1998 GMC Suburban 2500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1998 GMC Suburban 2500
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1998 GMC Suburban 2500 ProblemsEngine Misfire Due to Worn Valve Seat
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.
A Loose or worn gas cap may cause Check Engine Light to illuminate.
One or more fuel injectors may become stuck closed causing an engine misfire and the Check Engine Light to illuminate. Our technicians tell us that this problem can be caused by some fuel additives. There are special procedures which may be able to restore the affected injector. If this fails the affected injector must be replaced.