Question about 1991 GMC K1500

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The glow plug system does not operate when you turn the key on

I need a wiring diagram for a 1991 GMC Sierra with a 6.2 diesel

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Go to your local auto parts store and look for a book, Haynes Diesel Engine Repair Manual, Part number 10330. It has your wiring diagram and a lot more. I got mine at Canadian Tire.

Posted on Jun 03, 2009

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Posted on Jan 02, 2017

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2 Answers

Won't start- cranking, not rolling over started w/o glow plug warm up one too many times? troubleshooting plan : -crank it like you mean it -check batteries -check glowplugs en route to get...


Hi,
If you plan on keeping the van with the 6.2 diesel, My recommendation would be to by a Haynes Manual for the 6.2 Gm Diesel engine.
You have a glow plug controller, ( back where the distributor used to be ) a temp switch in the passenger side head, a couple of relays, and the glow plug themselves. The glow plus are along side each injector, about the size of a pencil with a wire hooked on the end. The injectors can be found by tracing the STEEL linens along side the valve covers.The Haynes Manual for the diesel gives a simple step by step guide to trouble shoot the glow plug system. A simple dc volt meter is all you need and a few tools.To copy that for you here would take many pages then you would have to print them out to take to the van. So hopefully you can afford to buy the manual. It will make your life way easier.
I have owned 6 of those engines. I love em'.
Wayne

May 07, 2011 | 1984 GMC VanDura

1 Answer

2003 GMC Seirra Duramax Deisel won't start


If it cranks and won't start then it is probably your glow plug system which is used to help with starting as diesel engines have no plugs and rely on compression. It also helps to run a lighter oil in the winter so it will crank faster. You can ohm out the plugs to see if they are broken. I am not sure of the wiring on the GMC but usually diesels have several wired in parallel

Dec 11, 2010 | 2003 GMC Sierra 1500

1 Answer

I have a 1994 GMC Sierra 6.5 turbo diesel and sometimes won't start or when running a at any speed will stop. I have changed the glow plug selenoide and the glow plugs and still got the problem. is normal...


First off the glow plugs are not the problem. Diesel's run purely off of compression. The basic principle behind them is compress the gas and and it will "spontaneously" ignite as long an the cylinder is hot. All glow plugs do is provide the initial heat that is needed. Once it is started they shut off. If you turn your engine off for a little while and then crank it back up, the glow plugs won't come back on as long as the engine is still warm. So now onto the actual problem. You have a FSD (Fuel Supply Driver) also known as a PMD (Pump Mounted Driver) that is failing. It tells the fuel injection pump when and where to deliver fuel. When they start going bad you will notice hestitation, to random stalls (usually when hot) to no-start situations. There is a forum I found which goes into much greater detail about it and how to fix it and help prevent it from happening again. CHeck it out. 6 5 NEWBIES START HERE
And here is a relocation harness kit made by Dorman:
Amazon com Dorman 904 113 PMD Relocation Kit Automotive

Jun 22, 2017 | 2008 GMC Sierra 1500

2 Answers

How to install plug wires in order? need to know which wire goes where.


V-6 1-6-5-4-3-2 V-8 1-8-4-3-6-5-7-2 Both turn clockwise. Number 1 is at the 5 o,clock position standing at the radiator.

Apr 02, 2010 | 1991 GMC Sierra

1 Answer

I have a 2003 gmc sierra duramax diesel and im in need of a glow plug diagram?


The diagram is simple each glow plug is connected in a series circuit like this -0-0-0-0-0-0-0 that's a in-line 6 for a V-8 it would look like this
[-0-0-0-0
[-0-0-0-0
and the plugs would be hooked up on the back then if you follow the wire to the glow plug relay you will find that the relay has four wires one to battery one to the glow plugs one to the ignition switch and one to ground in the box. If you want you can purchase a manual for 5.99 on-line. and it covers the three fuse-able links for this system and the new Glow plugs available for this truck here is the web page. http://www.wiring-diagram.com/?gclid=CMuAvJ3Ql58CFQZfagod0jpAxQ

Jan 09, 2010 | 2003 GMC Sierra 2500HD

1 Answer

Can a glow plug wiring harness from a 1982 gmc witha 6.2 diesel be used on a 1998 gmc sierra with a 6.2 diesel


As long as there is not damaged areas, and all connections are the same. Should work.

Apr 22, 2009 | 1998 GMC Sierra

1 Answer

My 98 gmc 6.5 diesel runs good then dies and won't start back.


there is a injector driver module relocation kit with a heat sink to mount it to because the module in the orgional location the module would overheat. also check the glow plugs the quick easy way to do this without removing them is to unplug all the glow plugs then hook a jumper wire up to battery positive and and touch it to each glow plug there should be a spark and if there isn't then the glow plug is bad.

Mar 16, 2009 | 1999 GMC Sierra

2 Answers

Need a wireing diagram for distributer on 1991 gmc 2500 sierra


I can help but I need to know what size of motor...and if it is a C1500/k15-2500/ Suburban....
please let me know and I can post a diagram for you.

Mar 15, 2009 | 1991 GMC Sierra

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