Does anyone know where I can get a 2012 GMC Engine harness diagram ?
I have looked at a lot of websites and it always gives me some other info or a 100 other models that I don't care about. I need to find out why my harness has a few problems
Does anyone know where I can get a 2012 GMC Engine harness diagram ?
I have looked at a lot of websites and it always gives me some other info or a 100 other models that I don't care about. I need to find out why my harness has a few problems
2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
2013 Silverado 5.3, 6L80k 8.8
Alldata or www.acdelcotds.com
Are you looking for pinout on the PCM? Or the entire harness assembly wiring. I will help you if you need the pinout but the entire harness assembly is a lot of work. Well over 40 pages. Send me your VIN and I'll get you the pinout. Other than that as gtstorey said....
AC Delco tds is $22 for three days. I can't get you all those wiring diagrams and pdf them to you fr that.
Thank You!Originally Posted by gtstorey
2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
2013 Silverado 5.3, 6L80k 8.8
Thanks for the pinouts. I had a temp subscription to alldata, and thought my problem was the pcm. So I didn't print out the diagrams. Got a new pcm and same problem. All the injectors are wide open at key on. 12v across the injector plug pins. so, now I have to figure out WHERE my harness is messed up. I will get another subscription and download the diagrams. Cheaper than a new harness.
The harness is a stand alone internet harness with no diagram. The engine is in my 2000 Camaro. No BCM or any of that stuff.
I guess the correct way to put it is that I have ground applied 100% of the time to the injectors. All of the ground wires are pinned to the correct number in the ecm plug. I have the whole harness unplugged now. I just don't know where to start looking without a diagram.
Last edited by Lakegoat; 11-29-2023 at 07:52 AM.
2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
2013 Silverado 5.3, 6L80k 8.8
Your best bet is to go through all of the schematics for engine and trans and print to pdf. That way you will have them as a better printable reference.
Thanks, I am getting ready to sign up for a few days
2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
2013 Silverado 5.3, 6L80k 8.8
I got the schematics. My store bought harness is bad. Sent it back.
While I was searching, I ran across a video on Utube that showed starting a LS with a stock harness. I happen to have one and the truck fuse box. I hooked it up and it fired up. That harness cost me a lot of time and money. China
2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
2013 Silverado 5.3, 6L80k 8.8
It is worth while to at a minimum if you buy the cheap china garbage to do a thorough testing. That includes getting a few appropriate pins and ohm out all of the wires. Also right before pull on each wire pretty firmly to ensure the terminals have been crimped
haha. ive got a buddy that buys a bunch of them chinese wiring harnesses then spends most part of a day trying to trouble shoot them.
Bad thing---I didn't know I was buying a China harness. And you are right about pulling wires. Three pins in the X1 plug were not seated. Even after I pushed them in, it didn't make any difference. Lets see, so far it has cost me hours and hours of trouble shooting time---buggin' tuners on here---, three oil and filter changes (gas in oil), another e38, licensing the new e38, rigging up the truck harness, electrical parts. And no way to get any money back for all of that. Disgusting!
2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
2013 Silverado 5.3, 6L80k 8.8
RDFI
I hope he quits buying them
2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
2013 Silverado 5.3, 6L80k 8.8
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