GMC Sierra 2500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your GMC Sierra 2500
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GMC Sierra 2500 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.
The fuel pump may fail causing the engine to stall and not restart.
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.
GMC Sierra 2500 QuestionsMy fuel gauge would not work on long trips it froze and wouldn't move until I turn the truck off. I replaced the fuel pump and the sending unit and still the gauge freezes up. Any ideas (1 answer)
Truck has 100,000 miles on it. Just a long trips. When Im idling the gauge moves.
Fuel pump is working fine.
The Green lamp light on the dash is on but no daytime lights. The head lights work fine when you turn them on.
GMC Sierra 2500 RecallsRecall 07V521000
The retainer clip for the fuel rail pulse damper may fracture and allow the damper to come loose from the fuel rail. A fuel leak in the presence of an ignition source may result in a fire. Dealers will replace the engine fuel rail pulse damper free of charge. The recall began August 31, 2006. The GM recall number is 06080.