Fuel System

Asked by May 27, 2017 at 01:03 PM about the 1993 GMC Sierra 3500 2 Dr C3500 SLE Standard Cab LB

Question type: Maintenance & Repair

started when i would go up hills it would act like i'm running out of gas then
when i would go flat run good. after that it would do it off an on flat or up hills
most time it wouldn't die all the time come out of it. Mechanic told me it was
fuel pump do with gravity changed fuel pump still does same thing hopefully
you will no what it is. appreciate your help thank you

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