20 Most Recent 1990 Chevrolet K1500 - Page 6 Questions & Answers

probably Idle air control valve or EGR. under the dash there is a diagnostic port! with key off bridge terminal A & B turn key to on position (do not start) this will flash any trouble codes VIA the check engine light the first blink(s) are confirmation. then count blinks EXP,*** **= 32 , ***** ***= 53 , ** ********= 28... then just google GM OBD1 trouble codes and see what the problem is .

There are fuses for the 4x4 system check your owners manual for a description and location of the fuses. There is a electrical solenoid actuator on the transfer case which engages the 4x4.

have you tried spraying starting fluid into the carb?

The sensing unit in the fuel tank is worn outToo old to drop the tank now & too much money & work

Need to remove steering wheel get a manual make sure no air bags if so walk away. I believe its straight foward remove steering wheel cover plate, find a location to stick a small thin screw driver down to push down a tab to release and to pull out cylinder,, replace with a new one with new keys from GMJoe

Could be a defective radiator cap or a blockage in the radiator or engine.

try to replace the transmission 1 to second synchronizer

http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f80c90e51Here's the way.

left side trans

the problem is switch faulty +cross wired test it for defective see the diagram attached:

any time you have a random misfire the light will flash untill misfire stops. if light is just coming on like a flicker you may have a short in dash or mill light circuit.