1993 GMC Forward Control 5.7 K, _NA_, CNGFACTORY OEM SERVICE PROCEDURE

Code 54, Fuel Pump Circuit

Code 54 will set if ECM does not see 12 volts on fuel pump signal voltage monitor during the first 2 seconds after ignition is turned on.

Fig 1: CODE 54, Schematic, Fuel Pump Cir. (5.7L C,K & P Series; 5.0L & 7.4L C & K Series; All W/ M/T)
G93D76425
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