StabiliTrak is an electronic stability control system that uses a steering wheel position sensor to compare the position of the wheel to the vehicle's actual steering response. In the event that something is off, StabiliTrack will make small adjustments to the brake or engine torque to help a driver maintain control.
When there's a problem with the sensor, you'll likely see a Service StabiliTrak light on your dashboard. The light might also be accompanied by TRAC (traction control), STAB (another light for stabilitrak), or ABS (anti-lcok braking system) warnings lights. If those lights are on, the systems are off so drive accordingly. Or use the opportunity to do some wicked donuts in the parking lot. Your call.
The safety systems help you when the road is slippery or you need to make an emergency turn, so when they're disabled you might want to give yourself some extra space. And that'd be fine, but there are some reports of reduced engine power, a hesitating transmission, and poor MPGs all happening when the safety systems are off.
The problem is widespread enough that it's coming up on LemonLaw.com.
Potential Reasons for the Service Light ∞
The reason why some of these systems are failing is rather complex. GM recommends you try to reset the StabiliTrak system yourself by turning off the engine for at least 15 seconds, and starting the engine again.
It's sort of like what Internet Servive Providers tell you to do with your modem in that it's complete crap and rarely works, especially if the problem is a faulty sensor.
What sensor? you might ask. Well, some of the sensors that owners have reported needing to get replaced include:
- Steering wheel position sensor
- Park assist sensor
- O2 sensor
- Bank 1 Sensor 2 - Range Performance
And each of these sensors can run from $250-$400 to replace.