The 2008-2017 Chevrolet Traverse, Saturn Outlook, GMC Acadia and Buick Enclave are all based on the Lambda platform and represent a large portion of GM vehicles. These vehicles can be front- or all-wheel drive.
The customer may describe a creak or squeak noise coming from the front suspension. The noise is typically more noticeable during cold temperatures below 40 degrees. The noise may go away when the vehicle warms up.
Inspect the roll restrictor heat shield for witness marks that indicate contact was made with the engine roll restrictor-to-subframe retaining bolt head.
The Pathfinder’s brake layout is relatively straightforward with ABS and Traction Control on all four wheels. The system switches fluid pressure of each brake caliper to increase, hold or decrease via signals from the control unit in the ABS actuator and electric control unit.
Whether the customer brings in the vehicle with a TPMS light triggered, or one triggers as a result of performing some tire service, not being able to turn off the MIL can sometimes cause headaches for shops. Here are a few commonly overlooked issues that could be triggering a warning light.
Firing the “parts cannon” at an active ABS wheel speed sensor code often results in misdiagnosis and an unhappy customer. It may start with the wheel bearing hub unit or wheel speed sensor. If those parts do not resolve the problem, the technician may fire the parts cannon at the ABS hydraulic control module. Typically, the customer’s patience and wallet runs out before the car is fixed.
Autoride comes standard on the GMC Yukon Denali and Yukon XL Denali. The product is also standard on the Cadillac Escalade, Escalade EXT and Escalade ESV, on which it is known as Road Sensing Suspension. GM also offers Autoride as an option for the Chevrolet Suburban, Tahoe and Avalanche 1500, as well as the GMC Yukon XL 1500.
Customers may experience no ride height change with the truck in really cold conditions and they may also have a Malfunction Indicator Lamp (MIL) illumination. They may also notice the truck does not change ride heights when selected in cold weather.
Most suspension system components pivot upon a rubber bushing that is compressed between an inner and outer metal sleeve. Because the compressed rubber bushing has no moving parts, it allows a maximum range of travel throughout a single plane without the frictional wear created in a conventional metal-to-metal bushing.
Brake fluid replacement is more critical than ever before. Since 2008, almost every vehicle has come with some form of ABS and a hydraulic control module mounted under the hood or on a frame rail. Since 2012, every light vehicle sold has been equipped with stability control that has added valves and complexity to the hydraulic control unit. The hydraulic control unit needs fresh brake fluid to operate and protect valves and passages from corrosion. An additive package helps control the pH, cavitation and viscosity.