Most of the time, you’ll feel it when it engages. It only activates when it detects that your Express is not moving in the direction you steered or if it detects that a skid has been overcorrected. Loss of StabiliTrak assistance is not going to be noticed during everyday driving. Service StabiliTrak Symptoms: Chevy Express Here’s a video from GM that shows precisely how the system works. The StabiliTrak control unit uses data from its sensors to apply a specific brake or reduce the engine power to correct the slide and get your Express pointed back in the right direction.įor example, if your Express is sliding on ice, StabiliTrak can apply one of the rear brakes to help get you pointed in the right direction. Hydraulic System– Can activate one brake at a time.It can also tell the powertrain control module to cut engine power if needed. Control Unit– Takes the data from the three sensors listed above and determines when to activate the StabiliTrak system.Steering wheel position sensor– Measures how many degrees the steering wheel has been turned.Rotation rate sensor– Measures lateral speed and rotation around the van’s centerline.Wheel speed sensors– They measure how fast each particular wheel is turning.Stabilitrak uses a complex system of sensors to detect whether or not your Chevy Express is appropriately responding to your input in emergencies. The number one reason that the StabiliTrak system fails is a wheel speed sensor issue. If you have a service StabiliTrak message, your van will no longer be assisted when a loss in lateral traction is detected. It is one of the most innovative and vital safety features on your Chevy Express and can keep you from crashing when skidding. It does much more than a standard traction control system. StabiliTrak is GM’s electronic stability control system. One of the most common issues with the Chevy Express, or any newer GM vehicle, is the “Service StabiliTrak” warning.
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