Before Fuel Pump Module Replacement, Check Ground G110 - kw GMT800 GMT805 GMT806 GMT820 GMT830 stall hesitate fuel pump nostart no start wire inoperative L18 L59 LR4 LM7 LQ9 LQ4 4.8 5.3 6.0 8.1

The following diagnosis might be helpful if the vehicle exhibits the described symptoms in the PI.

Some customers may comment that their full size pickup/utility stalls, hesitates or does not start. Some dealers have been replacing the fuel module reservoir assembly to correct this condition. Prior to replacing the fuel module assembly, refer to Fuel Pump Circuit Diagnosis ( SI document number 843906 ). Ground G110 has sometimes been found to be loose. While Bulletin # 04-05-25-002A refers to loss of communication with Brake Module, a similar situation appears to be causing unnecessary replacement of the fuel module assembly, where the G110 ground may be loose.

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Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

(2004 Chevrolet All Full Size Trucks and Utilities) and (2004 GMC All Full Size Trucks and Utilities) and (2004 Cadillac All Full Size Utilities)

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