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.
1997 GMC Suburban 1500 Problem Reports
Most Reported 1997 GMC Suburban 1500 Problem Reports
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A Loose or worn gas cap may cause Check Engine Light to illuminate.