1999 GMC 1500 Pickup Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1999 GMC 1500 Pickup

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1999 GMC 1500 Pickup Problems

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.

Replace Fuel Filter Every 30,000 to Prevent Fuel Pump Failure

The fuel pump may fail causing the engine to stall and not restart. Our technicians recommend replacing the fuel filter every 30,000 miles to help prevent undue strain on the fuel pump.

Windshield Wipers May Fail Due to Faulty Wiper Motor Control Board

The windshield wipers may not work intermittently due to a faulty wiper motor control board. Our technicians tell us that lightly taping on the wiper motor when the fault occurs should temporarily get the wipers working again. Some vehicles were recalled for this problem and some were not. You will need to check with your local dealer to find out if a specific vehicle was included.

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1999 GMC 1500 Pickup Questions

Why does my oil smell like gas...and white smoke come out of exhaust system. (2 answers)

New exhaust system n o2 sensor ..still smoke with the engine warm up ..but sometimes no smoke..and other times a lot ..the oil is not milky ..but oil cap looks like water bubbles on it ..Please help me out..thank you

The battery is fully charged but engine will not turn over. (1 answer)

When the key is turned nothing happens except lights come on. When turned to the start positive n trans. Indicator lights go out and all 2wd/4wd lights come on.

do you need the park brake or is their a secondary or is that the only emergency (1 answer)

like on the disc itself like most trucks not this alien craft i ended up with stupid set up

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1999 GMC 1500 Pickup Recalls

Seat Belts Not Proper For Vehicle

The seat belts installed on the vehicle may not meet proper federal requirements. Dealers will replace both front seat belts free of charge to resolve the concern.

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