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Old 02-23-2008, 03:05 PM   #1
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Default 5.3 wiring harness Wiring diagrams here!!!

Thanks to my man Mark west for hooking this up for me these are fuseblock and PCM and other essential wiring diagrams
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Old 02-23-2008, 03:13 PM   #2
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Old 02-23-2008, 08:04 PM   #3
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Thumbs up Nice Info!

Good stuff...Thanks for posting up!
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Old 02-23-2008, 08:21 PM   #4
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Sweet Jesus. Your a life saver!
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Old 02-23-2008, 08:43 PM   #5
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what is the differance between pcm1 and pcm2
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Old 02-23-2008, 11:04 PM   #6
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which one is the blue one and which is the red
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Old 02-24-2008, 12:12 AM   #7
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C1 should be blue C2 should be red verify by comparing the wire colors to the proper pin outs.
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Old 02-24-2008, 03:44 AM   #8
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I smell a sticky!
What year are the diagrams?
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Old 02-24-2008, 06:30 AM   #9
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Default What year

I bet they're 2005!!
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Old 02-24-2008, 08:31 AM   #10
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Model of 5.3? There are more than a half dozend of them with at least 3 differnt ECM's plus E38 ECM's (taken from the 6.2) with support for the 6L80/6L90.
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Old 02-24-2008, 10:03 AM   #11
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Quote:
Originally Posted by Gm-LSX View Post
Model of 5.3? There are more than a half dozend of them with at least 3 differnt ECM's plus E38 ECM's (taken from the 6.2) with support for the 6L80/6L90.
they are from a 2005/2006 Tahoe with a 4L60E 2WD
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Old 02-24-2008, 04:25 PM   #12
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Quote:
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Model of 5.3? There are more than a half dozend of them with at least 3 differnt ECM's plus E38 ECM's (taken from the 6.2) with support for the 6L80/6L90.
Yep. Some '05 5.3L motors use the E40 ECM like the one I'm installing in my Jeep now.
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Old 02-25-2008, 02:59 PM   #13
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thanks i will be going throuh the wiring this weekend. hopfully it will start
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Old 02-03-2010, 08:47 PM   #14
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This is as close as i have gotten to finding the (PIN OUT) for the computer to this engine i just got! I have a LQ4 6.0 liter out of a truck(2002), any one can give me a link to it. Ive been looking for hours, and all anyone says is do a search, i did and cant find it HHHHEEEELLLPPPPP!!!!! I just want to see if i can use the stock harness, and comptuer i got with the engine.
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Old 02-04-2010, 02:00 AM   #15
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Quote:
Originally Posted by MillsMotorvation View Post
This is as close as i have gotten to finding the (PIN OUT) for the computer to this engine i just got! I have a LQ4 6.0 liter out of a truck(2002), any one can give me a link to it. Ive been looking for hours, and all anyone says is do a search, i did and cant find it HHHHEEEELLLPPPPP!!!!! I just want to see if i can use the stock harness, and comptuer i got with the engine.
I think i used this one for my 2000 pcm. I didn't even know what year is was until i down loaded the tune. Yours should be close, just use common sense. Many of the wires are easy to figure out on your own by the plugs. Cam, crank, tps, iac plugs etc. If your color does not match then rethink it.

I don't use all the plugs & fuse block. I cut all that off & wire up my own set up. 15 amp each +12v for bank one & two coils, 15 amp each +12v for bank one & two injectors, a few other power & grounds & it will run.

http://www.lt1swap.com/99-02_vortec_pcm.htm
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Old 04-09-2011, 03:12 PM   #16
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hi all, does anybody have the PCM/ECU/ECM pinout for the 1999 GMC Yukon Denali V8?
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Old 04-06-2014, 11:18 PM   #17
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i need the 2001 schematic for a silverado 1500 :C all the ones i have found so far come nowhere close to matching my c1 layout
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Old 04-20-2014, 02:16 AM   #18
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Quote:
Originally Posted by axelfoxx View Post
i need the 2001 schematic for a silverado 1500 :C all the ones i have found so far come nowhere close to matching my c1 layout
see attached
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File Type: pdf Document ID_ 652964.pdf (139.3 KB, 274 views)
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