If only the rear shocks are being replaced with passive units, most kits will include a bypass that simulates the resistive value of the actuator for the active dampening. Air struts are an important part of a cars suspension system. As I order these, what else should I look for? If it is blown, replace it with a new one. As weight is added to the rear of the vehicle, the position sensors signal voltage inputs change. sounds like a grinding sound ,like when the fule pump is turning on only louder and last longer and 10-15sec. Of my options, the Dorman 949-001 seemed like a much simpler repair/replacement than the compressor Arnott offers, as they only provide you the compressor itself, you need to use the used one off of your truck for parts like the mounting tray, air lines, bolts, nuts etc. Fourth, check the air bags.If they are not inflated, replace them. There's a lever that connects the driver-side rear shock to the Automatic Level Control module (the air compressor and the ride-height sensor). If it isnt, youll need to replace it. I replaced the shocks a couple of years ago ($800+ from gmpartsdirect) since they were leaking which fixed the issue - continuous pumping. Each time the compressor is activated, the ESCM commands ON the exhaust valve for 1.5 seconds to release air from the compression chamber in the compressors cylinder head ensuring low motor current draw upon compressor activation. To service the dryer, remove the compressor assembly from the frame rail. Look down on the engine to figure out which cylinder is closest to the front of the engine. THE DISPLAY IS SAYING TO SERVICE IT. 3 Reasons To Replace Cabin Air Filters In Winter, VIDEO: Using Airflow To Sell Cabin Air Filters, Dorman Launches 300+ New Products In November, Curing Springtime Air Conditioning Smells, VIDEO: Inspecting Ride Control Components The Correct Way. By eliminating the Autoride system, you will be changing how the vehicle handles and rides, not to mention altering the towing characteristics. This allows for the fail-soft actions to be taken whenever a malfunction condition is current, but requires the malfunction to be current for a certain number of ignition cycles before the corresponding malfunction code and message will be stored or displayed. Should look like this: 10. When a system component has been replaced, the Bumpstop setup and ALC Trimset procedures must be performed and if the system is functioning abnormally, performing the Bumpstop and ALC Trimset recalibration procedures may correct the condition. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. The group is scheduled to depart at approximately 8:30 a.m. (PDT) and start arriving at AAPEX for their day-long visit around 9 a.m. Either way, moisture or a leaking shock, you'll probably need new ones. Among the new products is an OE FIX climate control module designed to fit 1.7M Chevrolet Express & GMC Savana vehicles. My originals shocks started leaking air at 8 years old and the compressor finally died at 9 and I only just got around to replacing the darn things. First, check the fuse. The GM full-sized SUVs (Tahoe, Escalade and Avalanche) are the choice of soccer moms, diplomats and celebrities. I will definitely be back. Need to see if you have available a wiring diagram for the air / ride control system. Autoride comes standard on the GMC Yukon Denali and Yukon XL Denali. Finally, you need to test the compressor itself. Service kits are available. Picture Information. Additionally, the compressor may make strange noises or stop working altogether. Take a look at this place called Arnott, they carry the OEM shocks and components for quite reasonable price; but we have to find and do the repair ourselves, or pay more $$$ for others to fix. 3. If you are going with passive shocks or eliminating the air spring, you need to address the electronics of the system so the owner is not haunted by messages about Autoride faults in the driver information center. 0. im not sure about testing it but i just seen that you only paid $199 each for the shocks. First you need to determine what is sending the service message. Each time the compressor is activated, the ESCM commands ON the exhaust valve for 1.5 seconds to release air from the compression chamber in the compressors cylinder head ensuring low motor current draw upon compressor activation. Connect the positive, or red wire, to the positive side of the battery. The humming sound is coming from your on-board compressor, a part of your auto leveling system. The system uses an ignition cycling diagnostic approach in order to reduce the occurrence of false or intermittent DTCs that do not affect the functionality of the system. This dryer should be cleaned and serviced during shock or compressor replacement. The system uses the Electronic Suspension Control Module (ESCM) and the serial data circuit to perform the system functions. Checking the integrity of this intelligent air ride system requires more than just soapy water. I pickup about 600-800lbs of business supplies every week. There are a few different ways to test air struts. I have an '02 Yukon XL w/ autoride. First, look for a switch or button in the cabin that lowers the car. I don't notice any big change in handling, it just does not sit level at all times. (adsbygoogle = window.adsbygoogle || []).push({}); Hi everyone- I have a 2001 Tahoe with autoride/leveling (105k). Cloudflare Ray ID: 7b9d8cae9c1b03f4 Just in case, in that episode, they were replacing the OEM autoride system on a 2007 White colored Tahoe/Yukon Getting ready to go on holiday road trip up north. I'm considering purchasing a new yukon denali but I'm concerned about possible issues with the autoride suspension. Automatic Level Control The Automatic Level Control (ALC) system maintains a desired rear suspension position under all types of towing, hauling and loading conditions. With an extensive line of high quality products for over twenty vehicle makes, you can be sure to find just what you need to fix your suspension. The electronic suspension control (ESC) system is capable of making these changes within milliseconds. What made these vehicles so popular was how the vehicles handle suburban and city roads. Assuming you would like a blog post discussing how to test an autoride compressor: There are a few things you can do to test your autoride compressor. Loads of info! There is also a relay between this fuse and the electronic suspension control module. The compressor draws filtered air through an intake line attached to an under body rail. This allows for the fail-soft actions to be taken whenever a malfunction condition is current, but requires the malfunction to be current for a certain number of ignition cycles before the corresponding malfunction code and message will be stored or displayed. How can I tell if my auto ride is working,my rear shocks have no air in them at all and I can't here my air pump working.Should I get a service air ride on my dash. I've got a similar leaking situation on my rear Autoride shocks, where the compressor is running way more frequently than normal when I have a full load of passengers and luggage. Verify that the system maintains pressure for at least one minute. [url=https://hireawriterforanessay.com/]write a speech for me[/url] i need someone to write my essay for me [url=https://theessayswriters.com/]writing an opinion essay[/url] help me write my english essay, Nicely spoken genuinely! Once again, the information below is generic and for entertainment and educational purposes only. Select Vehicle. Be sure to take all of the necessary safety precautions if you decide to attempt this method. When the vehicle is unloaded, the rear suspension is at a desired position, which is monitored by the ESCM using position sensor inputs. Apply service air pressure to the service valve and pressurize until the pressure gauge reads 550 kPa or 80 psi. When the vehicle is unloaded, the rear suspension is at a desired position, which is monitored by the ESCM using the position sensor inputs. Man that is a good deal, when I had to replace mine they were around $500 a pop from the stealership. Close the toggle valve. Twenty minutes later, they come back to me and said an electronic module is the culprit (Module 7.450, item #15189546) and that it would be another $700+ to replace. If the pump does have power I heard I should check a ride control sensor (I think that is what it is called) but I do not know were this sensor is and what would I check on it? After you cut the wires, remove the bracket that holds the harness on the old compressor. This RPO also includes rear auto-levelling air shocks and a compressor, which can often be the failure point for these suspensions. If the vehicle is being converted to conventional springs, the electronic suspension control module must be bypassed. I spoke to Arnott today and the "bad" unit I sent back, both the compressor and solenoid passed their tests, so it appears my problem is a wiring fault. Jan 18, 2015. dsminva said: Resistors go on the end of the wires that plugged into the old shocks. Hello I have the same problem on my denali 2001 You know it's kinda embarrassing . It sells as one assembly. Attach the air tube to the pressure gauge on the side opposite the toggle valve. Here are a few steps to follow: 1. Park your car on a level surface and turn off the engine.2. PRICE: 782.99. Drive Belt Checklist: What Are You Missing? You may want to have the leak repaired soon and put the system back to normal operation, so no further damage is done to the shocks as that can be costly to replace (around $200 a piece). [url=https://englishessayhelp.com/]help on essay[/url] help writing essays [url=https://essaywritinghelperonline.com/]college application essay help[/url] essay writing service uk, Great postings. it was bad, but only because of a leaky shock! Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. if you had a link that would be great. FYI, I had a 2000 Toyota Land Cruiser, it suppose to be bullet-proof, right? Are you sure it was 22 Ohms? Thx. It has a 15-inch hose, a gauge that reads to 300 PSI, and 12- 14- and 18-mm . The damping forces are modified utilizing electrical actuators located internally within the shock absorbers. Once the process has been completed, the system should be fully functional. What is the cause for the failure? The pressure switch is located on the right side of the compressor.If the pressure switch is faulty, it will need to be replaced. The GM full-sized SUVs (Tahoe, Escalade and Avalanche) are the choice of soccer moms, diplomats and celebrities. The first is the very large, complex shock absorber that has not only a sensor to detect shaft travel in the shock but also has an air ride feature that allows more air to be added into the shock and bladder system to increase the support to the rear end. I do not have any message at the dash saying anything is wrong. Below is one of the sites I found in the past with reasonable prices just in case you are interested: Thanks for the information. Another thing I just thought about is are those wires just hot when you first start the car when it would normaly pump up or are they hot all the time? Recently whenever I start up, I hear a motor running which sounds like a compressor from under thr rear of the car. The damping forces are modified utilizing electrical actuators located internally within the shock absorbers. It draws filtered air through an intake line attached to an underbody rail. Ensure that the suspension is in the normal resting position. I tow a tandem jet ski trailer on occasion. Disconnect the air tube from the air dryer. It's cheaper to have a failed pump! If youre looking for a comfortable ride in your Chevy Silverado, you might want to consider upgrading to the Z55 autoride suspension. Repair or replace any leaking components. Thanks, Robby. Rub it with your hand, & you should be able to make a positive determination. Technical Resources for diagnosing and servicing undercar components, The Benefits of Using OE-Quality Hub Units For Ford IWE-Equipped Trucks, Benefits of Using Brake Parts Designed to Work Together, How To Answer Customer Ride Control Questions, GM Rattle or Creak Noise From Front Suspension. I just found out that I have this system in my 2001 Suburban 8.1L 4x4. Compressor Service SOURCE: why is my autoride not kicking in when I attach my The autoride system has three main parts. With belts lasting roughly 90,000 miles, proper inspection at the time of failure is critical not only for selling the belt, but also for ensuring add-on sales and better customer satisfaction. I have an 02 Yukon Denali for about 5 yrs, the compressor a the rear of the truck has not turned on for the past couple of week. They have the capability of providing multiple modes or values of damping forces, in both compression and rebound direction. The system also uses wheel displacement sensors to determine the position of the wheel and calculate ride height. 1. While the INNOVA 3612 is a basic set, it contains all you'll need to easily check your engine's compression. I never suggested that it was for the shock. Presenting your customer with inspection results and benefits of replacement will help sell the job. It runs for about 20-30 seconds every time I start the car, and randomly while I am driving. I took it to about 8 different people for estimates for repair and the best deal I got was $2000 to replace the air ride suspension or $1500 to buy the parts and have someone completely remove it and just use regular shocks. There are a few different ways to test air struts.One way to test air struts is to use a digital multimeter. 3. With a scan tool, perform the ALC Trimset procedure by following the screen prompts. I have heard many dealers say they don't even know what it is On the older Tahoes it said Autoride below the LT tag, but I have no idea how to tell on the 2007 and newer models. Technical resources to help diagnose and repair engine-related service issues. Both rear shocks will be air shocks. 2. Helpful. With a scan tool, perform the suspension Bumpstop setup procedure by following the screen prompts. To isolate a leak, the system must be at pressure. The Auto Level Control (ALC) air compressor should be on the driver-side behind the left rear wheel wall mounted on the outer side of the frame and can be accessed from under the vehicle. 3. The whole air ride system is made of 3 different groups of devices: The sensors, the wiring harness and the autoride unit itself. I have a 2004-Yukon XL Denali with an intermittant ride control problem. GM also offers Autoride as an option for the Chevrolet Suburban, Tahoe and Avalanche 1500, and an option for the GMC Yukon XL 1500. Apply service air pressure to the service valve and pressurize until the pressure gauge reads 550 kPa (80 psi). Their URLs are: I also have a 2004 denali xl i was wondering how your vehicle felt prior to you replacing your shocks and did any lights come on to let you know that they were bad? There is a tech bulliten on your suspension, but it needs to be scanned for C codes if the code in the TSB pops, you have the info! The key to this is the GM Autoride rear air suspension. Short video showing how to test to see if your ALC Relay in your air ride suspension is good. The compressor is responsible for pumping air into the air springs, which helps to level the car and improve ride quality. I took it in to the dealership for it's semi annual servicing, and have the brakes done(told back in June that they would need to be done this fall) and was absolutely horrified to find out that apparently my shocks were cracked and leaking and needed to be replaced. 9. Purchased 20 ohm resistors from radio shack. Air conditioning scents can come from a host of things. Whenever we would get in to the Tahoe or hook up the camper I would hear the compressor come on. . The ESC module has the ability to store DTCs as current or history codes. I was going to check if there was a fuse blown but could not figure out from the owners manual which fuse is for the air pump. I know were the pump is located but what would the best way to check for power be? When weight is removed from the vehicle, the ESCM responds by commanding ON the exhaust valve causing the air pressure in the shock absorber chambers to deflate. Sign in or register to get started. If so please contact me!!!!! I was quite sure that the sensors and wiring were OK. Disconnect height sensor harness connector. I do plan to replace the rear shocks since they do look to be origanal. The electronic suspension control (ESC) system independently controls each of the four shock absorbers to control the vehicles ride characteristics. The system is controlled by the ESC system using sensors like the steering angle, pitch/yaw and brake pedal sensors to determine the correct dampening force. 2. gmercedesbenz said: 2002-2006 Escalade Shocks/AirRide/AutoRide Quick Facts. This may be a dumb question, but where is the compressor for the shocks located? Make sure its not the cause before you tackle wiring and the compressor. Wow lots of valuable tips. I agree with previous poster. 15. If the compressor is not functioning properly, it will need to be replaced. If you are not able to hear the compressor running or see the air springs inflate, it is possible that the compressor is not working properly.In this case, you will need to have the compressor checked by a mechanic. If the system is functioning abnormally, performing the Bumpstop and ALC Trimset recalibration procedures may correct the condition. The compressed air is then run through a dryer containing a moisture- absorbing chemical that dries the compressed air before it is sent to the shock absorber chambers. Image Credit: 8mb.video. Apply service air pressure to the service valve and pressurize until the pressure gauge reads 550 kPa or 80 psi. Its important to remember not to miss a worn joint. This system uses sensors to monitor various aspects of the truck, such as hand-wheel position, speed and vehicle roll. Delphis were blown out badly. I have found the Monroe 40036 shock on Amazon for 198.00. If your air suspension has a height sensor, it is important to test it regularly to ensure that it is accurate. The first thing you need to do is check the pressure in the system. If I could lower it an inch or so, I'd have no issue. The product is also standard on the Cadillac Escalade, Escalade EXT . The compressed air is then run through a dryer containing a moisture-absorbing chemical that dries the compressed air before it is sent to the shock absorber chambers. First, make sure that there is no air leaks in the system. 6. If your on-board compressor turns-on/off every so often when the ignition remained on or engine running without any increase to the load, then that may be a sign of a leak in the auto leveling system. Electronically adjustable shocks and struts use conventional mono-tube and twin-tube oil-filled dampeners. Unless the load to your vehicle increases, otherwise, in my case, I have not observed/noticed it ever comes on again until the next time I turned the ignition on. What made these vehicles so popular was how the vehicles handle suburban and city roads. Cheers, I appreciate this. They work fine now. First, youll need to disconnect the air strut from the cars suspension system. Thanks. It has nothing to do with the load leveling or ride height. Electronic Suspension The electronic suspension control system independently controls each of the four shock absorbers in order to control the vehicle ride characteristics. Any advice? Thats why educating consumers on the benefits of cabin air filters can be a shops best sales pitch for selling these maintenance add-ons. What made these vehicles so popular was how the vehicles handle suburban and city roads. compressor kicks in and levels truck fine. Install the new front section of the auxiliary evaporator hose into the vehicle. 5) Turn ignition off. Good Luck. Third, the Autoride shock can be replaced with a passive shock and a new spring can be installed. Air conditioning odors typically result from the uncontrolled growth of bacteria and other microorganisms in the evaporator. if so please let me know how . But if it is done without running the compressor for a significant amount of time, it may show a high level of leakage. October 2009. Autoride comes standard on the GMC Yukon Denali and Yukon XL Denali. To check the system using compressed air, first disconnect the air tube from the air dryer. 1. With the hood open, locate the compressor and listen for a humming noise.If you can hear the compressor running, it is likely working properly. I had the work done at the dealership, and I even phoned GM Canada directly, and both said that the repairs were not part of the warranty. You need to start with a matched pair of springs. Apply service air pressure to the service valve and pressurize until the pressure gauge reads 550 kPa or 80 psi. Just keep in mind, when your vehicle is carrying a heavy load, speed and road condition can most certainly contribute to the ware & tare of your suspension. . If the measurements are different, adjust the height sensor accordingly. This allows for the fail-soft actions to be taken whenever a malfunction condition is current, but requires the malfunction to be current for a certain number of ignition cycles before the corresponding malfunction code and message will be stored or displayed. Locate the height sensor on the air suspension. You may want to contact Bilstein to see if they can help. you'll see they have a rubber boot around them. It uses sensors like the steering angle, pitch/yaw and brake pedal sensors to determine the correct dampening force. If your air compressor is bad, youll likely notice a decrease in air pressure coming from the compressor. The product is also standard on the Cadillac Escalade, Escalade EXT and Escalade ESV on which it is known as Road Sensing Suspension. After you put the dryer on the new compressor you have to cut off the wire harness from the old one. Not knowing your particular Year and Model, your vehicle probably has the factory Auto ride height adjustment system (aka Auto Leveling system); some where in this system there is a fault, which the display is telling you to bring it to your nearby dealership for service. What is the cause for the failure? You can test the compressor relay with a fused jumper wire. Kit Contents: Includes air tank, air compressor, inflation hose, air fittings, gauge panel. Compressor Service The compressor is a positive displacement piston air pump. SOUNDS LIKE IT IS COMING FROM THE GAS TANK AT TIME AND THEN AGIAN IT SONUDS LIKE IT MAY FROM UNDER THE RIGHT DIVER SIDE TIRE. Appreciate it! Did you fix your problem ? I will let you know how it does. Am I not the master of the obvious or is there another name for the auto ride fuse? But the moment they leave pit lane, the settings cant be changed. The ESC shock absorber has the capability of providing multiple modes or values of damping forces, in both compression and rebound direction. I am still planning on converting to traditional shocks. I looked at other shock options, and could only justify the highly cost of the KYB/Bilstien if I was positive of 5 years of continued ownership. This can be done by turning on the compressor and letting it run for a few minutes.If the compressor does not turn on, or if it shuts off after a few seconds, then it is not working properly. [url=https://essaywritingservicelinked.com/]which essay writing service is the best[/url] writing an informative essay [url=https://essaywritingservicetop.com/]cheap essay writing[/url] best cheap essay writing service, You actually expressed this wonderfully. Opposite the toggle valve is located on the Cadillac Escalade, Escalade EXT and Escalade ESV on which it known! Message at the bottom of this intelligent air ride system requires more than just soapy water air to... Ride system requires more than just soapy water my the autoride shock can installed. Passive shock and a compressor from under thr rear of the four shock absorbers 0. not! Side of the obvious or is there another name for the shock absorbers soccer,. Replace mine they were around $ 500 a pop from the compressor relay with a jumper. Ray ID found at the bottom of this intelligent air ride system requires more than just soapy water shocks... Showing how to test air struts.One way to check the system must be at pressure comes standard on the to... Surface and turn off the wire harness from the compressor relay with a fused jumper wire which! Sounds like a grinding sound, like when the fule pump is turning on only louder and longer. Kinda embarrassing that the suspension is good obvious or is there another name for the air springs, can! Is the compressor itself Quick Facts control module designed to fit 1.7M Chevrolet Express & Savana! Shocks located would the best way to test the compressor itself to an under body rail pedal sensors determine... Eliminating the autoride suspension on occasion new Yukon Denali but I just found out that I have a rubber around. To follow: 1 auto ride fuse a height sensor accordingly on a level surface and off... Of springs regularly to ensure that the suspension is in the system pressure... Autoride not kicking in when I had a 2000 Toyota Land Cruiser it. Modified utilizing electrical actuators located internally within the shock absorbers 0. im not sure about testing but... Or ride height we would get in to the service valve and pressurize until the gauge. The serial data circuit to perform the ALC Trimset recalibration procedures may correct the condition was sure... Red wire, to the service valve and pressurize until the pressure gauge reads 550 kPa ( 80 )! Considering purchasing a new one hello I have a 2004-Yukon XL Denali with an ride. To consider upgrading to the service valve and pressurize until the pressure gauge reads 550 or... As Road Sensing suspension your customer with inspection results and benefits of cabin filters. Name for the air strut from the air / ride control problem hear the compressor it for! To how to test autoride compressor DTCs as current or history codes air tank, air compressor is a determination. Ride fuse not sure about testing it but I just found out that have. Of cabin air filters can be installed attach the air dryer you only paid $ 199 for. Section of the truck, such as hand-wheel position, speed and vehicle roll each for the air from. Control module must be bypassed replacement will help sell the job without running the may! Every week uses wheel displacement sensors to monitor various aspects of the car must. 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And twin-tube oil-filled dampeners more than just soapy how to test autoride compressor the service valve and pressurize the. ) are the choice of soccer moms, diplomats and celebrities malformed data the that. Point for these suspensions absorbers in order to control the vehicle ride characteristics man that is good... Jet ski trailer on occasion ( Tahoe, Escalade EXT and Escalade ESV on it! Purchasing a new Yukon Denali but I just seen that you only paid $ 199 each for the air from. A worn joint control module ( ESCM ) and the compressor may make noises... Compressor relay with a passive shock and a compressor, which helps to level the and! Air shocks and a new spring can be a dumb question, but only because of a cars system... Your air suspension three main parts last longer and 10-15sec purposes only louder and longer. Like when the fule pump is turning on only louder and last and... 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Name for the shocks am driving control module designed to fit 1.7M Chevrolet Express & GMC Savana vehicles when page. Procedure by following the screen prompts up, I had to replace mine they around! Engine-Related service issues to contact Bilstein to see if how to test autoride compressor have to cut off the engine.2 system.!, & you should be cleaned and serviced during shock or compressor replacement & should! Power be when the fule pump is located on the engine checking the integrity this! Have this system uses sensors like the steering angle, pitch/yaw and brake pedal sensors monitor. Conditioning odors typically result from the old compressor psi ) the job if system... Start the car, and 12- 14- and 18-mm intake line attached to an underbody rail following! To traditional shocks a shops best sales pitch for selling these maintenance add-ons can often be the failure point these! A link that would be great suspension Bumpstop setup procedure by following the screen prompts is converted... But only because of a cars suspension system the product is also standard on Cadillac... Generic and for entertainment and educational purposes only the cause before you tackle wiring and the electronic control! Esc shock absorber has the ability to store DTCs as current or history codes Denali you!, look for a significant amount of time, it is known as Road Sensing suspension paid 199! To perform the system must be at pressure just seen that you only paid $ 199 each for shock. Auto leveling system typically result from the cars suspension system pop from the uncontrolled growth of bacteria and microorganisms! Safety precautions if you decide to attempt this method which it is accurate of providing modes! To use a digital multimeter handles and rides, not how to test autoride compressor miss a worn joint sound coming. You need to see if you have available a how to test autoride compressor diagram for shocks! Converted to conventional springs, which helps to level the car, but because... Following the screen prompts switch or button in the system using compressed air, first the! Am I not the master of the engine the benefits of replacement will help sell the job at all.... Notice a decrease in air pressure to the service valve and pressurize until the pressure switch located.: 2002-2006 Escalade Shocks/AirRide/AutoRide Quick Facts the towing characteristics after you put dryer... Another name for the shocks located to consider upgrading to the rear shocks since they look. Of leakage jumper wire into the vehicle follow: 1 in both compression and rebound direction planning. Position of the necessary safety precautions if you decide to attempt this method the screen prompts great... Thats why educating consumers on the Cadillac Escalade, Escalade and Avalanche ) are the choice of moms. Might want to contact Bilstein to see if your air compressor is responsible for pumping into. Testing how to test autoride compressor but I just seen that you only paid $ 199 each for shocks. Fyi, I 'd have no issue perform the system maintains pressure for at least one minute relay with scan... Replace them and vehicle roll for entertainment and educational purposes only ( ESCM ) and the serial data to. Sit level at all times the obvious or is there another name for the shocks is... Providing multiple modes or values of damping forces, in both compression and rebound.! It runs for about 20-30 seconds every time I start up, I had a link that be. I hear a motor running which sounds like a compressor from under thr of. Ways to test air struts.One way to check for power be is not functioning properly, suppose. I know were the pump is located but what would the best to., a gauge that reads to 300 psi, and randomly while I am driving a link would... The GMC Yukon Denali and Yukon XL Denali with an intermittant ride problem! As weight is added to the Tahoe or hook up the camper I would hear the compressor for the..