RepairPal's independent, master mechanics track down the best of the best in auto repair. Learn more »
Get the latest advice about your car
SERVICE ENGINE LIGHT NOT COMING ON. NEED A PLACE TO START CHECKING.
The Check Engine Light illuminates when there is a problem detected in the Emission Control System on your vehicle. Learn more here; http://repairpal.com/check-engine-light
Common Problems > GMC Sierra 1500
Q&A > GMC > 2001 GMC Sierra 1500