1998 GMC 2500 Pickup Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1998 GMC 2500 Pickup

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1998 GMC 2500 Pickup Problems

Check Engine Light Due to Gas Cap Issue

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

Replace spark plugs every 100,000 miles

The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.

Check 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.

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1998 GMC 2500 Pickup Questions

What transmission does my truck have? (1 answer)

I have a 98 k2500 with the 6.5 diesel and a 5 speed manual the repair shop can't give me an accurate estimate without knowing if I have the nv4500 or a different transmission. the vin is 1gtgk24fxwz502196. Any help would be great as the estimate doubles if it doesn't have the New Venture...

What could the knock be (3 answers)

Has a knock and has white smoke coming from the exhaust. I know the smoke is from oil but the knock comes and goes after it runs for a min and gets warm the knock starts. Once the truck cools down the knock goes away. When the knock first happened there were metal in the oil. However I change th...

Brake warning light came on after hitting the brakes hard. Won't go off? (2 answers)

Had to suddenly hit the brakes at a stop light - - someone stopped a bit short in front of me. Hit the pedal hard, truck stopped just fine, but then, the brake warning light on the instrument panel came on and the pedal now goes way down - - almost to the floor. There is fluid in the brake master...

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