GMC 3500 Pickup Repair and Maintenance

A guide to problems, costs, maintenance and repair for your GMC 3500 Pickup

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GMC 3500 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.

Fuel Level Sensor Failure

It is common for the fuel level sensor in the fuel tank read the fuel level incorrectly. The sensor must be replaced to correct the condition. Our technicians recommend having the complete fuel pump module replaced on high mileage vehicles.

"No start" due to anti-theft system failure
The anti-theft system may fail causing a no start condition, the security light may illuminate. Our technicians tell us that the ignition switch may need to be replaced to correct this fault.

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GMC 3500 Pickup Questions

Why does my truck stalled when I push the accelerator (2 answers)

Why does my truck stalled when I push the accelerator it started happening all of a sudden one night when I was driving home had to have the truck towed home

Why would my tranny quit working all the sudden its automatic 1977 (1 answer)

what causes the 4 wheel drive actuator to not engage the differential? (1 answer)

I put in an actuator that I know is good, that one does not extend either, the transfer case shifts into 4 wheel drive and will spin the front drive shaft but the differential will not lock in. I am curious if there is a common wiring issue or if someone knows how much power should be at the fron...

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GMC 3500 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.

Seat Bolts Loosen And Fracture

The bolts that secure the seat recliner to the seat frame may loosen, fatigue and fracture, causing the seat back to recline suddenly. Dealers will remove all foam and fabric sandwiched between the recliner and frame, install washers between them, and install new bolts, tightening them to a higher torque specification free of charge to resolve the concern.

Reclining Seats Create Pinch Hazard

The easy entry recliner seat operation may allow fingers or hands to get caught and pinched within the recliner mechanism. Dealers will install a protective cover over the recliner mechanism free of charge to resolve the concern.

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GMC 3500 Pickup Reviews

I bought a 91 dually with 31000 original miles it runs better than my 2009 ever thought of .
I love my 3500 pu dully it is a real work truck ;I have put allot of toys in it because it paid me back it is in showroom condtion,the ony problem I have is the A?C heater control panel it sometimes blows fuses;Sometimes I feal my Steering floats,other than that ITS great I'll fix the other 2 stuff in time
This year paint was not GMC's best. I have had problems with the paint peeling off in strips.Overall strong truck 7.4 454 big block. I tow a 30' toyhauler and this truck can pull.

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