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2004 gmc 7500 ecm wiring diagram - Vandura GMC Cars & Trucks

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6ya6ya
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Posted on Jan 02, 2017

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skychief2001
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SOURCE: wiring diagram 5.7 gmc sierra knock senser

Looks like the wire from the sensor to the module is dark blue.
You can find the engine diagram on autozone's website under repair help.

Posted on Sep 03, 2012

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I need the wiring diagram on a 2004 GMC 7500 Diesel 26' Box Truck. The Tail Lights are not working but everything else is. There is also a beeping like as if the E-Brake is on. Any suggestions?


check the wires in both trailer connections
check that the beep is not from a reversing alarm that is mis-wired in the plug and trailer connection

Dec 23, 2015 | GMC Cars & Trucks

1 Answer

I need a gmc safari diagram for fuel pump 1991


I don't usually do diagrams due to copyright laws.
From the fuel pump you have a gray wire and a black wire.
The black is ground and the gray is power from both the pump relay and the oil pressure switch.
The oil pressure switch provides power to the pump once the engine starts.
At the relay, you have a green and white wire that provides power from the ECM with the key switch on. You have an orange wire that provides power from a 15amp fuse.
The gray wire going to the pump, and a black and white wire for ground for the relay.
The ECM provides power for 3 seconds when the key switch is turned on to boost line pressure for startup.

Jan 30, 2013 | 1997 GMC Safari

1 Answer

ECM fuse keeps popping and fuel system don't work


There should be two ECM fuses. Number one powers the injectors and some of the solenoids along with the ECM. Number two or B powers the fuel pump relay and the rest of the ECM including the sensors that provide data to the ECM. Both are 10amp circuits.
You may need to get a shop manual to have the wiring diagrams to troubleshoot the circuits.

Sep 20, 2012 | 1988 GMC S-15

1 Answer

2004 GM 4.2 6L engine wiring diagram


either go on line internet look up engine wire diagram or buy a gm factory manuals they not cheap cost $198.00 or let dealership look up your engine wiring diagram.

Sep 09, 2012 | 2004 GMC Envoy

1 Answer

Wiring diagram 5.7 gmc sierra knock senser


Looks like the wire from the sensor to the module is dark blue.
You can find the engine diagram on autozone's website under repair help.

Sep 02, 2012 | 1994 GMC Sierra

1 Answer

P0340


I think the 2004 Accent only came with a 1.6 liter engine as far as I know. In any case below is as much information I have as far as your code including a wiring diagram of that circuit (CMP sensor). The wiring diagram doesn't tell the wire colors but does tell you where the wire goes or what "pin" number it is at the connectors. I included the connectors which is by number and marked the ECM connector for you. I had a picture of the CMP sensor location but not the ECM location but can tell you the ECM connector is located behind the dash fuse panel. Hope this helps....

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Mar 14, 2012 | Hyundai Motor 2004 Accent

1 Answer

ECM I fuse keeps blowing in my 1996 1 ton gmc sierra 4x4 with a 454 v8 engine whats causing it


For the ECM 1 fuse to open you obviously have a short to ground , start with the injector disconnected and see if ECM 1 fuse still blows.If it does disconnect crank sensor, also inspect wires for the injectors or any rub through wires here is a diagram cansmo_178.gif

Sep 09, 2011 | 1999 GMC Sierra 3500

1 Answer

I need a diagram for my ecm ground. its a 1992 gmc vandura G3500cargo. i am not getting a pulse to my injectors. also check engine light wont come on.


The ECM acts as the ground for the injectors. Sorry to say but your ECM is shorted out. The ECM is grounded threw the case connected to the body and or has several grounds in the wiring. But these grounds are not the problem, the problem is the quad drivers in the ECM.

Aug 23, 2011 | GMC G3500 Cars & Trucks

2 Answers

Need a wiring diagram for a 2004 gmc denali yukon


There is no "freebie" for this one, however, if you go to www.alldata.com it's 25 or 26 for a year and will give you everything from bolts, nuts, wires, common problems, Technical Service Bullitins from GMC and specific to your vehicle. I use it for my Denali and it's well worth the money! It will show you every ground, every power, cpu, light bulb, and how to pull it apart and put it back together. Hope this helps

Mar 23, 2009 | 2004 GMC Yukon

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