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GM SIERRA: HAVE AN 05 GMC DURAMAX. STALLS OUT SOMETIMES NOT

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HAVE AN 05 GMC DURAMAX...
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: 2 years ago.Category: GMC
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Answered in 15 hours by:
7/22/2015
GMC Mechanic: Toolhut, ASE Certified Technician replied 2 years ago
Toolhut
Toolhut, ASE Certified Technician
Category: GMC
Satisfied Customers: 551
Experience: Owner of a mobile diagnostics company assisting auto technicians with difficult vehicles
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Do you have any modifications to truck? It must be starving for fuel have you replaced fuel filter? How many miles on truck?
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GMC Mechanic: Toolhut, ASE Certified Technician replied 2 years ago
Did you figure anything out?
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Customer reply replied 2 years ago
No modifications, new fuel filter, 246K
GMC Mechanic: Toolhut, ASE Certified Technician replied 2 years 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?
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Customer reply replied 2 years ago
YES I DO HAVE ACCESS TO A SCANNER.
GMC Mechanic: Toolhut, ASE Certified Technician replied 2 years ago
do you have any faults? Look at fuel system for high pressure pump reading when running.
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Toolhut
Toolhut
Toolhut, ASE Certified Technician
Category: GMC
Satisfied Customers: 551
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