GMC Yukon XL Denali Problem Report
GMC Yukon XL Denali Check Engine Light Due to Gas Cap Issue
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
This has happened twice that the check engine light came on with the message of tighten gas cap - Visitor
Check engine comes on. A bottle STP gas treatment or dry gas fixes it. - Visitor
Check engine light due to gas cap issue. - jabureh
One or both secondary air injection check valves may become restricted causing poor air flow re...
FLUTTERING NOISE WHEN I ACCELERATE AND CHECK ENGINE LIGHT BLINKS
WHEN I CHECK WITH ONSTAR DIAGNOSTICS THEY SAY IT IS NO LONGER A PROBLEM BUT HAVE IT CHECKED IF...
how do you get the light to go off?
my evap code keeps coming on and the local auto parts guy tells me it should go off in a few da...