1990 GMC 1500 Pickup Questions

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350motor,700R4 auto trans,4whldrv, used to be a farm truck.wires torn out all over,replaced fuses but still nothing. Is there more disable links or an inertia switch idkbout somewhere?
Have a rebuilt need to pull the old and install the new
all other lights work on 88 Silverado.bulb,socket ,and fuse good.
I have a 1988 gmc 1500 Silverado.why aren't my tag lights working?i believe the fuse is the same as the park light fuse.the fuse and the light socket and bulb are good.neither light works.
My 1990 GMC has given me so many problems for the last year. So many parts have been replaced! Now it cranks, has spark and almost start and if this makes sense it will start for 1/2 a second. Have replaced the starte...
Replacing the whole rear on my truck, and I need to know what rear differential to get. Unfortunately, my glove box was broken and taken out a few years ago, so it's just an open space to look at wires. Also the drive...
Would it cause the truck(an automatic) to shift late? A super rich smell? An injector not to spray?
It cranks and acts like its going to start but wont. It is getting spark. The fuel injectors are not simultaneous. One will spray and then the other one....back and forth. Is it the fuel control module or coil? I thin...
My truck has been running horrible...we knew it was some type of sensor issue. Hubby finally figured out it was the throttle positioning sensor so he fixed it. Truck ran better for maybe 3 or 4 days. Now we start the ...
Also my truck backfires when I press on the pedal too hard, it bogs down, idles up and down...not consistent, wont stay started, sometimes has a rich smell, check engine light will sometimes come on and fuel consumpti...