Prime the pickup

Asked by Jun 19, 2016 at 06:10 PM about the 1990 GMC Sierra 2500 2 Dr C2500 Extended Cab LB

Question type: Maintenance & Repair

I don't know how to prime my new pickup the fuses
are good the fuel pump runs but there ain't any gas
getting to the carberator

1 Answer

15,675

'99 GMC Seirra is fuel injected called TBI (throttle body fuel injection) you need to check the fuel filter and pressure from the fuel pump, using a gauge connected to the fuel line between the pump and TBI (looks like a carburetor) read how many PSI. Just a running pump doesn't mean there is enough fuel pressure.

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