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Toolhut
Toolhut, ASE Certified Technician
Category: GMC
Satisfied Customers: 494
Experience:  Owner of a mobile diagnostics company assisting auto technicians with difficult vehicles
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GM SIERRA: HAVE AN 05 GMC DURAMAX. STALLS OUT SOMETIMES NOT

Customer Question

HAVE AN 05 GMC DURAMAX. STALLS OUT SOMETIMES NOT FOR A WEEK, AND SOMETIMES EVERY 1/4 MILE. HAVE HAD IT TO TWO GM DEALERS, NO CODES AND CAN'T FIND THE PROBLEM BUT IT KEEPS HAPPENING NANY IDEAS? BOB
Submitted: 1 year ago.
Category: GMC
Expert:  Toolhut replied 1 year ago.
Do you have any modifications to truck? It must be starving for fuel have you replaced fuel filter? How many miles on truck?
Expert:  Toolhut replied 1 year ago.
Did you figure anything out?
Customer: replied 1 year ago.
No modifications, new fuel filter, 246K
Expert:  Toolhut replied 1 year ago.
With it being an 05 I would recommend adding a air dog lift pump. It is likely that your CP3 pump is going bad or you have a leak. either the CP3 pump or a stciky injector.Do you have access to a scanner?
Customer: replied 1 year ago.
YES I DO HAVE ACCESS TO A SCANNER.
Expert:  Toolhut replied 1 year ago.
do you have any faults? Look at fuel system for high pressure pump reading when running.