1998 GMC 1500 Pickup Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1998 GMC 1500 Pickup
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1998 GMC 1500 Pickup ProblemsCheck Engine Light With Code P1870
Vehicles equipped whit a 4 speed automatic transmission may develop a harsh 1-2 shift and/or illumination of the Check Engine Light with code P1870 stored. This can be caused by wear of the bore for the TCC isolator and regulator valves in the valve body. This condition does not commonly occur until the transmission reaches normal operating temperature. If the valve body is worn, replacement will be necessary to correct this concern.
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.
The quick-connect fittings for the heater hoses tend to leak engine coolant. This problem commonly occurs because the metal housing has become brittle, which can break and cause leaks.
1998 GMC 1500 Pickup QuestionsMy passlock security light won't turn off after several reset attempts (1 answer)
After my truck died in some real bad rain I replaced the distributor cap, wires, and plugs. Then there was no fuel pressure! So I replaced the fuel regulator (on spider injector), fuel filter, and fuel pump. She had great fuel pressure, spark and compression! So now I'm at the anti-theft pas...
Vacuum is good with crankcase out of the circuit, when running won't accept full throttle unless you ease into it, played w with timing, cap and rotor not 2 bad haven't checked codes. Vortec V8 350
1998 GMC 1500 Pickup RecallsFuel Tank Rubs Causing Noise And Possible Leak
The fuel tank may rub on the body at the front inner corner, causing a noise and possible fuel tank damage resulting in leakage of fuel. Dealers will inspect the fuel tank for wear and install a spacer between the fuel tank and body, as well as replace leaking tanks free of charge to resolve the concern.