20 Most Recent 1986 GMC K1500 - Page 3 Questions & Answers

The fittings on the engine will come with the o-rings and plastic fastener Run to parts store and pick one up

overdrive servo/ solenoid is not operational , either from failed unit or wiring problem check transmission actuator for operation or adjustment as well

maybe your running hot, check your coolant to water ratio.

If the engine is trying to flood, it will kill the engine. If you have the spider fuel system, it is noted for problems. If it cranks good but won't start, have a helper crank it while you check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure, also, check fuel injector pulse. I don't know if this may be a problem? below

maybe wiper arm mechanism on way out

Parts stores sell a Haynes trans manual for GM which should cover this.

Drive shaft carrier bearing.

Id guess shift linkages are messed up. or controls for the change to 4 by 4. Guess you got what you paid for? Drives in 2 wheel ok right? At least that part is good?

under hood fuse block If you need further help, I’m available over the phone at https://www.6ya.com/expert/mike_9693b5ad75773352

front hub may not be pushing gear into hub remove hub check spring and gear If you need further help, I’m available over the phone at https://www.6ya.com/expert/mike_9693b5ad75773352

Hope this helps.

What you can try doing is purchasing just a new connector that if you can still use the same actuator. They do sell them depending on the year of your truck. Or try a junk yard.

Try your dimmer switch, when they go bad we either have bright or dim.

I would make sure your fuel pump is fully operational and is pushing the recommended pressure of 35 psi. You will need a fuel pump pressure gauge (tester). I would start here and them move forward.

Need to check neutral safety switch on automatic trans.

When you cycle ignition to on position , you should hear fuel pump relay under hood buzz for a few seconds then it stops .

There's a routing diagram sticker under the hood. Look for it on the radiator support , the front shock tower or on the hood itself. type this on google and see what you get...gmc k1500 serpentine belt routing diagram