1998 GMC 2500 Pickup Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1998 GMC 2500 Pickup
Never overpay. Check prices with our estimator
Verified by mechanics, reported by drivers like you
Ask a mechanic in our community
1998 GMC 2500 Pickup ProblemsInstrument Panel Lights Flickering and Exterior Lights Intermittent
The headlight switch used on the GMC Sierra 2500 is known to fail through normal operation. Since the headlight switch is also integrated into the interior lights, a malfunctioning switch can cause issues with interior lights as well.
- Symptoms of a failed headlight switch include:
- Headlights and taillights failing to turn on or off
- Interior lights flicker, or fail to turn on or off
- Gauge cluster lighting off or flickering with headlights on
- Parking light malfunctions
This issue is well known with General Motors Trucks and SUVs, and is solved by testing and, if needed, replacing the headlight/dimmer switch. Bad grounding wires at the tail-lights, and dirty/corroded tow package wires can also lead to some of these issues.
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.
1998 GMC 2500 Pickup QuestionsWhat 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...
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...
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...