20 Most Recent 1991 Chevrolet C1500 - Page 7 Questions & Answers

The sock filter on the bottom of the pump is bad and it burned up the pump. You will need to drop the gas tank and replace the pump.

sounds like the brake switch is sticking. its on top of brake pedal arm. when applying brakes the pedal makes contact with the switch and turns on brake lights. if the switch sticks or its out of adjustment brake lights will stay on.

Did you make sure all your wire harnesses are all connected,if so start looking for a bad ground

The easiest place to begin diagnosis on the fuel pump circuit is at the relay.GM usually has this in the underhood fuse/relay center.You can get the pin diagram for the relay by looking at the pin numbers on the bottom of the relay and the diagram on the side of the relay housing.Use this to make sure you have 12 volts coming in,continuity to the feeds to the relay coil,and continuity to the pump.The PCM will turn the relay on for 2 seconds when the key is turned to "run"(I can't remember if this is a switched 12v or ground).You might try a short cut-there are several relays that are identical.Mark the fuel pump relay to avoid mix-up,and swap it with one of the others(I like to use the A/C compressor relay).This will tell you if the relay is bad(a likely possibility,especially since you already replaced the pump)

The governor gear may have stripped,it's plactic. Just in front of the tailshaft there is a round cover about 4 inches around,some have a wire clip over the cover.Pop the cover off,(might lose about 1/2 cup of fluid)Pull the governor out (should be very easy)If the plastic gear on the end is "apple cored" or at all damaged ,it will keep the ****** in low.As will having no vacuum to the modulator valve.

if it does not need a tuneup, then I would say to check the coolant tempurature sensor. if bad it will result in. poor cold idle, stalling, rich mixture and ******** timing, slow idle speed, cold hesitation, stumble, poor fuel milage. good-day! if need be. change plugs and wires first ! this could also be your problem.

push button type floor shift type high range2wd does transfercase motor make noise did you burn transfercase clutches out? front not engaging but low range for rear help us help u

Air in system