1992 gmc sierra 4.3 losses power in 5th & 4th gear

Asked by ORDFO1 Oct 06, 2013 at 01:24 PM about the 1992 GMC Sierra 1500 C1500 Standard Cab LB

Question type: Maintenance & Repair

no back fire, but loses pwr in higher gears. ok if I shift down

2 Answers
280

Sean answered 11 years ago

most likely fuel pump or pressure issue. high gear at highway speeds while trying to slowly accelerate is a high load condition-pump may not be able to handle the demand.

Mark helpful

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