2010 GMC Sierra Denali Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2010 GMC Sierra Denali
2010 GMC Sierra Denali Problems
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Units with 4 wheel disk brakes may develop at situation where the park brake does not hold as it should. Our technicians tell us this can be caused by worn park brake shoes located inside the drum section of the rear brake disks. The worn shoes should be replaced and properly adjusted to correct this issue.
One or both secondary air injection check valves may become restricted causing poor air flow resulting in illumination of the Check Engine Light. It is often recommend to replace both check valves even if a fault code is set for only one bank of cylinders. Replacing only one valve may result in a return trip to the repair shop.