05 GMC C5500 Duramax Diesel Wiring

Anyone have the wiring info for this vehicle? If not, do you have any ideas on where to find the glow plug wire? I can probably find the rest of the wires by testing. These don't have an anti-theft system do they? I have one coming into the shop this weekend and the owner couldn't tell me much about it.

	Battery		RED		(+)		IGNITION SWITCH HARNESS
	Ignition 1		PINK		(+)		IGNITION SWITCH HARNESS
	Ignition 2		WHITE		(+)		IGNITION SWITCH HARNESS
	Ignition 3		BROWN		(+)		IGNITION SWITCH HARNESS
	Accessory 1		ORANGE		(+)		IGNITION SWITCH HARNESS
	Starter 1		YELLOW		(+)		IGNITION SWITCH HARNESS
	Anti-Theft Type		GM PASSLOCK II® ANTI-THEFT SYSTEM
	Anti-Theft Descript		THE BCM MODULE MUST SEE A SPECIFIC RESISTANCE VALUE BEFORE THE VEHICLE WILL START PROPERLY
	Key Sense		TAN		(-)		IGNITION SWITCH HARNESS
	Tachometer		LIGHT BLUE		(AC)		AT ECM MODULE NEAR DRIVERS SIDE OF FIREWALL...PIN #76 - CLEAR PLUG
	Wait To Start		DARK BLUE		(-)		AT ECM MODULE NEAR DRIVERS SIDE OF FIREWALL...PIN #36 - CLEAR PLUG
	Glow Plug		YELLOW		(-)		AT ECM MODULE NEAR DRIVERS SIDE OF FIREWALL...PIN #6 - CLEAR PLUG
	Crankshaft Sensor		DARK BLUE/WHITE		(-)		AT ECM MODULE NEAR DRIVERS SIDE OF FIREWALL...PIN #12 - BLUE PLUG
	Camshaft Sensor		BROWN / WHITE		(-)		AT ECM MODULE NEAR DRIVERS SIDE OF FIREWALL.PIN #73 - BLUE PLUG..
	Speed Sense		DARK GREEN / WHITE		(AC)		AT ECM MODULE NEAR DRIVERS SIDE OF FIREWALL...PIN #50 - CLEAR PLUG
	Parking Lights		BROWN		(+)		AT VEHICLE LIGHT SWITCH
	Brake Lights		WHITE		(+)		AT SWITCH ABOVE PEDAL
	Reverse Lights		LIGHT GREEN		(+)		AT DRIVERS DOOR SILL HARNESS OR TRAILER CONNECTOR
	Horn		BLACK		(-)		IGNITION SWITCH HARNESS

Power Unlock		WHITE		(+)		AT DOORLOCK RELAY MODULE ON PASSENGER SIDE OF TRANSMISSION HUMP NEAR FIREWALL	...PRESS THE LOCK BUTTON ON EITHER DOOR TO LOCATE THE CLICK MADE BY THE RELAY MODULE TO AID IN LOCATION
	PowerLock		LIGHT BLUE		(+)		AT DOORLOCK RELAY MODULE ON PASSENGER SIDE OF TRANSMISSION HUMP NEAR FIREWALL

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M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!

Although it does randomly list security...When it is not present...This is what the notes say...

	Anti-Theft Type		GM PASSLOCK II® ANTI-THEFT SYSTEM
	Anti-Theft Descript		THE BCM MODULE MUST SEE A SPECIFIC RESISTANCE VALUE BEFORE THE VEHICLE WILL START PROPERLY

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M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!

Thanks a lot, I couldn't find that info anywhere. Do you know if the Brown Ign3 is like most GM's where it is just for the radio and other accessories?

I could not find the ECM mentioned above. There was nothing on the drivers side of the firewall either under the dash or under the hood. There was what I would assume was the ECM above the passenger wheel under the hood, but there was no clear plug. So needless to say, i couldn't find the tach wire or the wait to start wire. i did not see a wait to start light on the dash either. I found a lt. Blue wire that I am pretty sure came from the cluster but it only registered about 50mv but it did increase when the gas was pressed. It did not work as a tach wire. Any ideas on this anyone? I couldn't find any more information on this vehicle anywhere.

does this truck have a Duramax diesel, or is it a little CAT?

Duramax Diesel. I am not sure of the engine size, but it is a fairly base model with no power windows or door locks. I would guess it is a 6.6L but that is just a guess. Thanks for any help you can give.