Close

1990 GMC S15 Questions

Get answers to questions about your 1990 GMC S15 at RepairPal. Find solutions, diagnose problems and get back on the road.

Refine by vehicle
×
Choose your vehicle
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
23
questions

coolant leaking on floorboard. Also, the blower barely blows so I was gonna replace the blower motor as well. But does replacing the heater core have anything to do with the A/C? Thanks!

i replaced coil, distubetor ignition coil im getting spark, fuel from fuel pump but injectors wont pulse ran a ground check from ecm and ran a hard ground to one injector and it sprayed but wide open , it wont pulsate please help. its actually a 1987

i replaced coil, distubetor ignition coil im getting spark, fuel from fuel pump but injectors wont pulse ran a ground check from ecm and ran a hard ground to one injector and it sprayed but wide open , it wont pulsate please help

1989 GMC, S-15, 4.3 V-6, basically, cranks but no spark...Help from NAPA, new coil, ECU computer, ICM, and checked fuses. Seems to have 12v at one input wire to coil with ignition turned on. Been a "shade tree" for 50 years, 85k mi., pristine truck.. Thanks...John

I am asking because I have to remove my transmission to replace my rear main seal for my oil.

it shifts fine after you do get it to go into gear

It is really a 1985, but your list didn't go back that far. It is hard to put into first gear, and it grinds going into reverse. It is a v6, but not sure which one.

Now it won't stay crunk either

Filled the gas tank and headed down the road, I got a lil warm so I turned on AC for first time this year. Immediately after flipping the switch, the truck died and oddly, now I don't have headlights either. I put gas into carburetor (?) and it started for maybe three seconds. Dash lights, door chime, brake lights come on, all fuses check good, battery is charged. It sounds like it might start but won't. Things I have done in the past month are new fuel pump, new starter, new fuel pump relay, new alternator, new plugs. I am at a loss. The book is no help to me. I am a single mom and have never been trained on auto mechanics, so I don't know all the terminology. Thanks for any help.

When i turn the key on the throttle body fills up

I charged the battery & checked all connections & it still wont even turn over

does this damn thing have a fuse relay were is it