91parkave

iTrader: (4)

Thanks to my man Mark west for hooking this up for me these are fuseblock and PCM and other essential wiring diagrams

91parkave

iTrader: (4)

brentg454

iTrader: (7)

Good stuff...Thanks for posting up!

SheldonZ28

iTrader: (4)

Sweet Jesus. Your a life saver!

orangefun

iTrader: (5)

what is the differance between pcm1 and pcm2

orangefun

iTrader: (5)

which one is the blue one and which is the red

91parkave

iTrader: (4)

C1 should be blue C2 should be red verify by comparing the wire colors to the proper pin outs.

fast400

iTrader: (1)

I smell a sticky!
What year are the diagrams?

eagleuh1

I bet they're 2005!!

Gm-LSX

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.

50adrod

iTrader: (1)

they are from a 2005/2006 Tahoe with a 4L60E 2WD

98blackSS

Yep. Some '05 5.3L motors use the E40 ECM like the one I'm installing in my Jeep now.

orangefun

iTrader: (5)

thanks i will be going throuh the wiring this weekend. hopfully it will start

MillsMotorvation

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.

code4

iTrader: (30)

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

richard_lyew

hi all, does anybody have the PCM/ECU/ECM pinout for the 1999 GMC Yukon Denali V8?

axelfoxx

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

91parkave

iTrader: (4)

see attached

John McPherson

Ok it is now 2015 and this information is still useful :-)
have had the 5.3 in a '87 T-Top LS Monte Carlo and just getting to the A/C - it is important to run the A/C through the PCM to avoid over pressure and have A/C compressor clutch off at WOT. Thanks to all who posted here. going to upload some additional content because the wire descriptions are the same, but the pin location is different from 2000 and 2007 - 2008 to 2012 then again 2013 to 2017. LT1swap has a lot of good information there. People who buy ready made harnesses really miss out because when something goes wrong the intimate knowledge of how it all works is missing and then they are stuck. Kudos to all posting here.

tta656

iTrader: (5)

Thanks