Question about 1988 Chevrolet C1500
I personally have 1988 GMC truck and had to replace the fuel pump. I found all the info including wiring diagram in a haynes repair manual. These can be purchased in most automotive parts stores. Something I found interesting is that the fuel pump's operation works through the oil pressure switch, located by the distributor screwed into the engine block. If this switch is stuck or sticking it will affect the fuel pump. Replaced a good fuel pump for nothing! The truck had sit up for awhile and the ground wire connections had to be cleaned as well.
Posted on Sep 17, 2009
1988 Chevy Dually changing from diesel to gas already put enging in and stuck at the wiring harness.
Posted on Apr 07, 2010
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Posted on Jan 02, 2017
Fuel pump fuse is cut out by a relay and I believe the oil pressure switch.
The goal is to have the fuel pump shut down automatically if there is an accident and the engine stops.
Posted on Jan 03, 2010
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