Top 20 1989 GMC K1500 - Page 6 Questions & Answers

You may have to replace the o-ring or gasket but first you would have to have the system evacuated as it illegal to let it go in the atmosphere. Then, replace the O-ring/gasket pull a vacuum on the system to remove any moisture inject the right amount of refrigerant oil and then charge the system with the proper amount of refrigerant. If you do not have the right equipment to do this job bring the vehicle to a professional where they can further assist you. It is important to remove the moisture from the system as it may cause performance issues and even damage later on.

i would imagine you blew the bulbs so check them first before you go on the magic relay quest,

I'm not sure exactly what your problem is. When you "click" your lights to low beam, your high beams should not work. But if your low beams work when you "click" them on, but your high beams don't work when you "click" them on, you either have a blown fuse, bad relay or high beam elements burned out on both lamps. (Not so unusual) Possibly a bad "dimmer" stalk switch or bad wiring, too, but a little less likely.

The 88 up to 2000 model of this truck utilizes 5 types of automatic transmissions with both 700r4 transmission and the 4L160E. They should bolt on together. Watch out for the lines that go with it including the ground connectors.

ok number one on distributur should be marked and its 1-8-4-3-6-5-7-2 in clockwise order and on engine, right side is 1-3-5-7. left is 2-4-6-8. couldnt find a good diagram but thats correct

Hi, Sounds like you may have a vacume leak and soap will just be sucked in to the motor.I would check for loose bolts on throttle body or rubber seals that are loose.Check for cracked rubber hoses also or loose hoses. Throttle body may have a split gasket as well.You can use a stethoscope that can be bought at auto parts to pin point noise or soft piece of paper. Thank Y for choosing FixYa.

they should not. the 700r4 is a lock up conveter and the TH 400 is not.

please explain in more detail. thanks.

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check the ecm fuses first. then check to see if a scan tool will communicate with the ECM. if not, then check to see if you have a sensor shorted out that is shutting off the 5 volt circuit of the ECM and not allowing to truck to start.

have ya checked fuses

if computer command truck with an ECM replace the engine's oil pressure sensor. It has 3 wires to it and one runs to the fuel pump to prime upon starting the engine. Once oil pressure is acheived the computer switches that senors wires circuit off and turns on the fuel pump relay to take over the fuel pumps operations till you shut the engine off

may want to check the fuel pump relay. also the crossed out oil pressure switch is a safety feature to stall the engine if oil pressure drops. it is possible the oil sending unit is bad also.

HI there i see you replaced distributor cap .
on distributor cap is two small screws on some caps
the screws are too long and the has a gap and moister
can effect the distributor. if so tack out and reuse old ones
or tack back to store where you got them ok

First thing to check is the cabin filter..The vehicle will tell you where the filter is ,,and how to change it..Also make sure there is no obstructions in the return..Usually under the glove box area or around the cowl which is outside underneath the wiper arm

if fuel pump is working ? then your float or floats are stuck try softly tapping around carb with a rubber mallet while cranking. dont help floats could be bad, or float seat ****

you may check the amount of voltage by voltmeter at the blower motor connector with your ignation on ( car on idle) and AC running, you need to replace the motor if it reads 12V below. You may also try cleaning the air exhaust for that matter.

a 700R4 is the same as a 4L60. if you have a large round plug on the passenger side of trans , thats a 4l60e and will not interchange (it's computer controlled)

Here how it looks like

check the relays & fuses

Hello: .060 is the recommended gap.