Required fields are marked *. it comprises a compressor, a pressure/dryer device and what I think is a solenoid. 1. I have a 2002 GMC Yukon XL Denali that has the Autoride feature. The GM full-sized SUVs (Tahoe, Escalade and Avalanche) are the choice of soccer moms, diplomats and celebrities. Teslas air suspension is smart because it uses GPS information and vehicle speed to adjust suspension ride height. 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. Now at 112K miles, the message has returned. you'll see they have a rubber boot around them. 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. Using a multimeter, test the autoride compressor for continuity.4. it is just electronic shocks. With a scan tool, perform the ALC Trimset procedure by following the screen prompts. 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. Messages. It has nothing to do with the load leveling or ride height. Air Ride Repair Vs. Autoride comes standard on the GMC Yukon Denali and Yukon XL Denali. I never suggested that it was for the shock. FYI, I had a 2000 Toyota Land Cruiser, it suppose to be bullet-proof, right? Andrew Markel introduces an inexpensive tool that can assist in selling cabin air filter replacements. If your car has air suspension, there are a few things you need to do to test your air suspension compressor. There is also a relay between this fuse and the electronic suspension control module. Connect the positive probe leads to one of the terminals and connect the negative probe to the battery ground. Intermittantly we see a Service Ride Control mesage on the dash display, but sometimes the system works fine. The only remaining item was the autoride unit itself. GM also offers Autoride as an option for the Chevrolet Suburban, Tahoe and Avalanche 1500, and an option for the GMC Yukon XL 1500. Another way to test the compressor is to jack up the front or rear of the car and support it with jack stands. 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. I have a 2007 Sub 1500 LTX, and have the 3 huge factory service manuals which carry all of the GM/GMC/Chev/etc iterations of Suburbans and Tahoe. Here is a step-by-step guide on how to do this: 1. They're air shocks, and the liquid is probably water (condensed moisture), running out over the rubber boot. The ESC shock absorber has the capability of providing multiple modes or values of damping forces, in both compression and rebound direction. 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. The system performs a self-test on each ignition ON cycle in which the ESCM commands the ELC relay ON, activating the compressor for 4 seconds, then monitors the position sensors signal voltage inputs to verify the compressor is functioning and the system is holding air pressure. This system uses sensors to monitor various aspects of the truck, such as hand-wheel position, speed and vehicle roll. Picture Information. Remove the front section of the auxiliary evaporator hose from the vehicle and discard. The compressor draws filtered air through an intake line attached to an under body rail. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. If the pressure gauge reads the same pressure as the cars suspension system, then the air strut is working properly. Connect the positive, or red wire, to the positive side of the battery. You need to determine if the wet is H2o or oil. Once the process has been completed, the system should be fully functional. SOURCE: why is my autoride not kicking in when I attach my The autoride system has three main parts. Some race shocks have six adjustments for compression and rebound, so they can be tuned for the exact amount and rate of suspension movement needed. I bench test my compressor off my GMC Denali to see if it works after Service Ride Control message appeared on my dash after fixing it just 4 months ago. This is why this test should be performed only after running the compressor for a while. The product is also standard on the Cadillac Escalade, Escalade EXT and Escalade ESV on which it is known as Road Sensing Suspension. Presenting your customer with inspection results and benefits of replacement will help sell the job. Place the vehicle on a flat level surface. I just pulled out my factory shocks, and they measured 2.2 Ohms. A $2.75 part cost $240. - The Escalade employs 2 different systems in regards to the shocks on the truck. Well be happy to help you get the most out of your Silverado! the compressor should be located behind the driver's side, rear wheel. You can test the compressor relay with a fused jumper wire. When a system component has been replaced, the Bumpstop setup and ALC Trimset procedures must be performed. Attach the air tube to the pressure gauge on the side opposite the toggle valve. Every time the compressor is activated, the ESCM commands the exhaust valve ON for 1.5 seconds to release air from the compression chamber in the compressors cylinder head, ensuring low motor current draw upon compressor activation. Mine was good. Ensure that the suspension is in the normal resting position. I am, over all, worried about final cost. How To Replace Air Shock Compressor Motor, http://www.arnottindustries.com/part_GMC_Air_Suspension_Parts_yid15_pid95.html, http://www.arnottindustries.com/part_GMC_Air_Suspension_Parts_yid15.html, http://www.powerblocktv.com/site3/index.php/trucks, http://www.arnottindustries.com/part_CHEVROLET_Air_Suspension_Parts_yid11_pid92.- html, http://townhall-talk.edmunds.com/direct/view/.f0af225/18, http://www.fullsizechevy.com/forums/general-discussion/technical-maintenance/291- 516-autoride-disconnect.html, Do Not Sell or Share My Personal Information. I was quite sure that the sensors and wiring were OK. On our last trip, I stopped to get a bite to eat, when I came out, I noticed the hitch was sitting lower than normal. Start the engine and test the air suspension. Thing is, when I first bought the car, it would only run if I had a load in the back, or put a trailer on. I have an 07 Denali, so I hope I am not going to miss lead you the compressor for the autoride system on mine is accessible from under the vehicle, behind the Left/Driver-side rear wheel well, mounted on the frame. Your email address will not be published. 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? If I could lower it an inch or so, I'd have no issue. If you think your car has air suspension, there are a few things you can do to check. step 20). 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! Close the toggle valve. If it is blown, replace it with a new one. I found a site in Florida that sells cheaper than dealers or napa. You are absolutely correct. Wiring Harness Included: Yes. Disconnect the air tube from the air dryer. It should be close to the air filter housing. I just put Z71 replacements on all four today. With the car parked on level ground, measure the distance from the bottom of the tire to the ground.Compare this measurement to the ride height listed in your owners manual. Why does it occur with specific vehicles? There are three replacement options when it comes to a GM Autoride System. the reply from kiawah sounds logical. Be sure to follow the factory repair information for your specific application. Testing. You can email the site owner to let them know you were blocked. If the measurements are different, adjust the height sensor accordingly. If a ball joint fails, the driver loses control of the vehicle. the site is Arnottindustries.com A few months ago, I purchased the compressor from this company, & it works fine now. Apply service air pressure to the service valve and pressurize until the pressure gauge reads 550 kPa or 80 psi. How to Troubleshoot and Repair a GM AutoRide (Air) z55 Suspension. The answers might surprise you. Next, youll need to slowly apply pressure to the air strut.If the pressure gauge reads zero, then the air strut is not working properly. 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? The ESC module has the ability to store DTCs as current or history codes. With a scan tool, perform the suspension Bumpstop setup procedure by following the screen prompts. 1) Rotate the engine to TDC for #1 cylinder. 9. 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. 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. Next, youll need to remove the air cap from the air strut.Once the air cap is off, you can place the digital multimeters probes on the two exposed terminals. Mine is actually on the frame rail on the passenger side in front of the rear wheel, not sure why its different. Repair or replace any leaking components. Come to think of it, I did see someone had done that on his Avalanche, replaced the autoride shocks with gas-charged shock by Bilstein (similar to the Z71 shocks). Attach the air tube to the pressure gauge on the side opposite the toggle valve. Some race shocks have six adjustments for compression and rebound, so they can be tuned for the exact amount and rate of suspension movement needed. What is the cause for the failure? 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). This inflation raises the rear of the vehicle to regain the desired suspension position. Dual needle. Can anyone describe how they wired in the resistor? Trimset Recalibration If the system is functioning abnormally, performing the Bumpstop and ALC Trimset recalibration procedures may correct the condition. If it is your rear shocks and you want to replace them with aftermarket air shocks and use the on board leveling then you can splice the damper solenoid wire place a resistor ir resistor coil in there trick the system and your ALC will still work with the ESC to raise your vehicle to the proper height. If the system is functioning abnormally, performing the Bumpstop and ALC Trimset recalibration procedures may correct the condition. And did that fix your problem and how many miles did you have when they went bad? 5.0 out of 5 stars SS Yukon XL sets sail on smooth waters. The key to this is the GM Autoride rear air suspension. A week later I realize that the ride is terrible and I can bounce both the front and back of the car! I am sick of looking at the service message. Initially the Tech said the Solenoid failed again (jokingly asked if I was selling them on Black Market) and said they would replace under warranty. Install the new front section of the auxiliary evaporator hose into the vehicle. Connect your negative, or black battery cable with the grounded contact in the compressor. My 2002 Yukon XL did not pump up to level yesterday when I had a load on. Sign in or register to get started. If this is possible what resistor should I use? 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