20 Most Recent 1989 Chevrolet C1500 Questions & Answers


I am looking at my owners manual for my 2003 Trailblazer Vortec 4.2L L6 (this is the inline 6, the option for a V6 is not available for the 6 cylinder). Per the owner's manual Spark Plug gap is .042 inches and the firing order is 1-5-3-6-2-4

1989 Chevrolet... | Answered on Aug 15, 2018


First thing to do is check for fault codes, all you need is a paperclip to do this. link to instructions is below, also make sure you have correct fuel pressure. FAQ How to read older GM codes for free

1989 Chevrolet... | Answered on Jan 18, 2018


Without testing the electrical circuit's for the headlamps we'd only be guessing . Looking at wiring diagrams an testing the circuit's with a DMM - digital multi- meter is the way to find the problem , not just replacing part's . Sound's like you know nothing of automotive electrical system's ,an testing . Suggest you take your vehicle to a qualified repair shop.

1989 Chevrolet... | Answered on Nov 30, 2017


The wire to the sender in the fuel tank is shorted. If it was open or disconnected it would read full.

1989 Chevrolet... | Answered on Oct 16, 2017


Any codes? Dirty throttle body.Fuel filter.Air filter.

1989 Chevrolet... | Answered on May 01, 2017


Usually one on each side of the exhaust before it comes together. This helps diagnose issues to the left or right bank of cylinders.

1989 Chevrolet... | Answered on Jul 18, 2016


Are you having trouble with brake lamps? The orange wire is voltage for brake lamps, voltage comes from fuse. When brake switch is activated, the white wire goes hot, goes to turn signal switch. Your lower brake lamps are wired through turn signal switch.
Any other wires may be for cruise control, where applicable. I'm probably leaving something out, I just can't think what it is, at the moment?
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1989 Chevrolet... | Answered on Jun 18, 2016


Well you can find the horn on the front by the grill or on the wheel well. I prefer the easy way. Pull the fuse for the horn.
Hope this helps. God Bless :O)

1989 Chevrolet... | Answered on Feb 21, 2016


I had same problem mine is a regular cab I almost went crazy til I saw it was only 1 torx bolt on each side of the bench. I loosened those and.. VOILA.. worked. Of course retighten after. Hope it helps

1989 Chevrolet... | Answered on Feb 21, 2016


Paul, you do not have to remove motor just unplug it, if you do not want it powering up. Open hood and see if you can see antenna base through a inner fender access hole, if you can,be careful of sharp metal, you will have to reach in and unplug.
press the helpful button

1989 Chevrolet... | Answered on Feb 11, 2016


I'd have to check actuator movement for defrost. The actuator is electric according to my database. The actuator should be under dash at end of hvac housing.

1989 Chevrolet... | Answered on Dec 10, 2015


Not unless you bypass it so the pump gets power.

1989 Chevrolet... | Answered on Dec 05, 2015


Does it have a distributer ? or DIS ignition system ? Sounds like bad ignition module .

1989 Chevrolet... | Answered on Dec 01, 2015


Should be one line comes from the fuel tank to the pump and the other line goes from the pump to the carburetor or injector body. Some cars have a third line that relieves fuel pressure from the pump to the return in the tank. This third line is much smaller than the other 2

1989 Chevrolet... | Answered on Nov 09, 2015


what engine?

Do you have power to the injectors? if not check the ECM1 fuse. If blown check the wiring harness around the throttle body for pinched wires to the injectors. Really common on the early throttle body engines.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

1989 Chevrolet... | Answered on Aug 20, 2015


I agree with the above comments. You have to be sure you got the firing order correct. If in doubt, look it up and double check it. When a car is backfiring, it can be from running the fuel too lean. You can always buy a compression tester tool and make sure you have compression on all cylinders.

1989 Chevrolet... | Answered on Apr 20, 2015


According to Dan B. on answers yahoo.com: "missing spacer. The heavy wire from your alternator goes directly to the battery. If that wire is grounded, you are sending battery power directly to ground - blowing that link. That wire is not a ground wire - I don't care what the color of the insulation is - black or red. "

1989 Chevrolet... | Answered on Apr 20, 2015


Enter this in your web browser 'image' search bar/box
"Chev 1989 c1500 lighting wiring diagram"
a bunch of diagrams pop up, you need to go thru them to find the one you need.

1989 Chevrolet... | Answered on Mar 28, 2015

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