20 Most Recent 1996 GMC Sierra - Page 7 Questions & Answers

the new fuel pump you bought is it new or second hand? is it with the correct pressure sending or is something else? is it working accordingly or does it cut out? From what you state if is new even sometimes even new are faulty especially are imitation and the other hand is if is new probably with not enough pressure output is. Check also your fuel filter too.

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Check your wiring in the column. you may have a break in the wiring and it makeing contact

Don't drive it. Call a mechanic.

For the rear seal, remove the drive shaft, and the seal should be very visible there. Very fortunate, as this is the easiest and cheapest seal there is to replace! Be extremely careful installing the new one, if using a hammer or similar installation item. If it isn't seated properly the leak will continue. Good luck.

control mudle is hooch,

Hit it with a big hammer and spike or a chisel ,even a old long screwdriver ,if you lose it inside the engine dont lose sleep over it it wont hurt just fit the new one and make sure you have 50% antifreeze added to prevent internal corrosion

U prolly have a blown fuse problem.

You need to determine is it a fuel problem or a ignition problem or other. You can squirt fuel into the throttle bores and try cranking and see if it starts. If it does it is fuel issue. Pull plug wire and stick screw driver in and hold over ground while cranking and look for spark, or use spare plug and ground outside while cranking and look for spark. (Note do not hold metal shank as some HEI Ignition systems are capable of 100,000 KV output) If you see spark then it is not Ignition. Last would be check for compression on all cyl. and all should be equal and at least about 100 psi. If timing chain chain is bad it could cause low compression. This a basic series of quick checks to narrow down where the problem is. If any of these fail then further diagnostics it that area will be needed to determine cause.Good luck.

no heat from heater could be a result of a malfunctioning water valve, plugged up heater core/radiator, a stuck open thermostat, air bound system, broken water pump impeler...

You would need to take a meter or test light and check the starter for voltage, then the circuit from the starter to the key switch including the neutral safety switch.

check if the air filter is not blogged and if your fuel pump is working in the recommended results

On the blower motor under the dash "if" it has one. Only three things are connected with the blower motor. The fuse, the motor itself and the controls on the dash.

Too low a pressure. Best to drain old fluid and replace it. Try to first replace about half the fluid and run the truck turning the wheels back and forth right to left to let the new fluid move around. I could suggest a cleaner but you may ruin the seals in the piston. Drain again. Then refill all the way and see if this helps.

I think that is the first time I have heard of that in the 40 yrs I have been working on cars.I would start by unplugging the headlight switch and checking the circuits for shorts. Let me know what you find out.

Looks like a 30amp circuit breaker marked ACC-BAT.