20 Most Recent 1989 GMC K1500 - Page 2 Questions & Answers

Very common of the GM's, I've changed out many climate controls! You should be able to pick 1 up at most any salvage yard for a very reasonable price and it never hurts to check with the parts stores as well as they have started carrying them too! Hope this helps you.

i have a similar problem but my left signal works, when i turn the right on it just does an annoying buzz sound. if you can think of any explination for such shinanogins help would be greatly appreciated

Timing. Your probably not TDC.

fuel pump , fuel pump relay on fire wall, fuel filter, may all need replaced, pump in tank, inspect all wiring in this circuit, especially all grounds,, grounds get overlooked & that is sometimes the problem. I have a 1988 gmc 2500, I 'm talking from experience. can you hear if fuel pump runs for 2 seconds, when you turn key on ? if not, ground problem or pump problem. relay has a fuse in it, check that. check all fuses. NOW, spark ! coil ? plug wires ? distributor cap & rotor ? replace them if you haven't !!!!!!!!!! get to work, see how you do ! good luck !

If you take off the inside Door Panel. You should see a Belt that goes through the gears, check and see if it is broke. You probably need to replace it.

Check the vacuum modulator and the hose going to it. Also check for vacuum leaks on or around the engine. Have you checked the fluid level or changed the fluid in the transmission? How about the throttle position sensor? (if it has one).

It should be on the right side of the column under the gear selector right behind the steering wheel. Its a little knob.

one element is for brakes/turn the other one on the same bulb is running lights how ever the part about brake lights go threw the turn signal switch the turn signal switch has diodes in it so that both rear light don't light up when turning i hope my explenation helps and yes some years gmm had bad tail light circuit boards you can test the connector at the lens housing with a test light there is also a plug connector where the bed meets the frame in the rear

Drive your truck to get the light to come on find a place to pull over and read the codes. Here is how >> link to page

i have a 1988 k1500 seirra truck, that will idle fine then it will choke its self out and stall out.(i have a new egr synolyd,new egr, a 1992 ecm pulled from a junk yard,new cap,rotor, plugs wires,distributorand, a new coil,,map sensor,and a 2 year old tps sensor; and the copression is 140- 155 in all cylinders), but it wont say running, what can i look at next to help it run and stay running?

when mine was pulling up the code it pulled a 12,33, and45

Are you a TBI?(throttle body injector) if you are take the top of the air cleaner out step on the gas pedal(do this in park hood open fire extinguisher on the ready.) does it backfire through the air cleaner if it does you are in need of a whole distributor unit the distributor unit has a relector that has a high tendency for failure by the way the vehicle sound there is only 2 possible problems you coil is faulty and this includes the connection to the coil which has a tendency to seperateor the connection to the ICM.(ignition control module where the coil is) or the whole distributor reluctor

You can ground it pretty much to any existing bolt on the frame. If the area you choose is painted, sand it down to the metal for good continuity and you're set.