The engine may develop a misfire due to worn valve seats. This fault will cause the Check Engine Light to illuminate. Our technicians tell us the misfire may or may not be felt while driving. They further recommend that both cylinder heads be removed and thoroughly inspected and repaired as necessary.
Car problem reports
Problem with your car? See what our experts say or submit your own.
Most reported 1997 GMC Suburban 1500 problems
A Loose or worn gas cap may cause Check Engine Light to illuminate.