20 Most Recent 1991 GMC K1500 Questions & Answers

Wiring, schematic, electrical diagrams, fuse diag, error codes, torque settings etc are basic contents of these online books they have here on this website www.reliable-store.com I have attached. Must check it out

1991 GMC K1500 | Answered on Mar 14, 2018

You should be able to readjust the aiming screws to reset them to the way you want. Remove the head light bezel and you should see the aiming screws.

1991 GMC K1500 | Answered on May 09, 2015

Yes, by any chance you know your transmission ratio and your differential. If they are very different then you have to change the rear ratio. By changing the ring and pinion.

Now you play there is a bolt with a screw head and a nut around it. Loosen the nut but do not let the screw turn with it as you loosen the nut. Turn the screw bolt 1/4 to 1/2 a turn clockwise and keep checking it for your satisfaction, but do not take it all the way off.

1991 GMC K1500 | Answered on Jan 20, 2015

Should be Dexron, you should be able to tell by removing the side plug. You see red it is Dex.

1991 GMC K1500 | Answered on Jan 19, 2015

Check for spark/fuel??

1991 GMC K1500 | Answered on Dec 17, 2013

NO, but if in question replace it, not difficult. I replaced mine on my 1988 gmc k2500, but thats me, I did a total rebuild, like to make things run perfect, run good, these trucks last like they should.

1991 GMC K1500 | Answered on Feb 15, 2013

You also have no carburetor on a 1991 vehicle

No one on the internet would know either without
a picture of the problem

1991 GMC K1500 | Answered on Oct 10, 2012

yes you do have to knock shims out if you go get it alined they charge you alot more to do that becouse they cant aline the frontend with them in there they are in there in to keep the front end alined from the factory

1991 GMC K1500 | Answered on Sep 11, 2012


Why your old truck keeps (or doesnt) running

It cannot be stressed enough, that basic routine maintence is the best way to prolong the life of any car or truck. The sad fact is people overlook some of the most important parts of maintence. First i would say, transmission maintence, ie. ****** flush and filter replacement. Most high mileage problems can be avoided by having this done as per your manufactor suggests. Second is ignition, regular replacement and testing of the ignition system can prevent/repair many problems. Another overlooked aspect is body lube points. There is a zerk for almost anything that is bolted to anything else.

on Aug 17, 2012 | 1991 GMC K1500

A bad ignition module can give you fits!!!! Replace it even if it doesnt fix it! You will be glad you did! Most likely that is the problem ,however!

1991 GMC K1500 | Answered on Apr 30, 2012

If this vehicle has high miles, the camshaft timing gear nylon teeth may be breaking off and going into the lower part of the oil pan, blocking off the oil pickup tube screen. Oil starvation.

1991 GMC K1500 | Answered on Mar 25, 2012

Below is the master help link provided to go through belt routing diagram:---Timing belt,drive belt,serpentine belt,accessory belt,fan belt,engine belt routing diagrams for all types of car models?
Click the link below :----http://carbeltrouting.blogspot.in/2012/02/timing-beltdrive-beltserpentine.html
----------This will help.Thanks.

1991 GMC K1500 | Answered on Feb 17, 2012

as long as it is a 5.0 or 5.7 and still a vortec series they will intechange fine

1991 GMC K1500 | Answered on Feb 27, 2011

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