Delphi P12 PCM (Second Gen PCM for GM 4.2L Inline 6)

[Gampy]

Well, that's half the answer ... Or one end of the cable.

Nice PDF ... Thank you!

[Gampy]

To answer to my own question ...

OBDII ------> P12 PCM
Pin 4 & 5 --> Blue Pin 7 ----> -12v Battery (ground)
Pin 16 -----> Blue Pin 20 ---> +12v Battery --> Ignition Switch --> Blue Pin 18 & 19.
Pin 2 ------> Blue Pin 15 ---> J1850 VPW
Pin 6 ------> Blue Pin 1 ----> CAN+
Pin 14 -----> Blue Pin 2 ----> CAN-


OBDII ------> E67 PCM
Pin 4 & 5 --> Black Pin 23 --> -12v Battery (ground)
Pin 16 -----> Blue Pin 20 ---> +12v Battery --> Ignition Switch --> Black Pin 13, Blue Pin 18 & 19.
Pin 6 ------> Grey Pin 53 ---> CAN+
Pin 14 -----> Grey Pin 33 ---> CAN-

[spyder09]

quick post to reference the 49 page p12 forum for development as well. I have cross referenced a few of the different vehicle p12s and they all seem to match up pin for pin (as I expected) just some do and do not use specific pins. It would be nice to have a full cross reference between all the p12 vehicles if someone has access to alldata to help pull those.

2006-2007 GMC Envoy, Envoy XL, and Envoy XUV (4.2L)
2006-2007 Chevrolet TrailBlazer and TrailBlazer EXT (4.2L)
2004-2007 Chevrolet Colorado (2.8L, 2.9L, 3.5L, 3.7L)
2004-2007 GMC Canyon (2.8L, 2.9L, 3.5L, 3.7L)
2006-2007 Buick Rainier CXL (4.2L)
2006-2007 Isuzu I-Series (4.2L)
2006-2007 Hummer H3 (3.5L, 3.7L)
2006-2007 SAAB 9-7X (4.2L)
2005-2007 CobaltSS & Saturn ION (2.0L S/C only)
2006 Chevrolet Malibu 2.2L
2005+ Ariel Atom (2.0L S/C)

[mechanicalmatch]

I found this guy a while back. He has some ecm pinouts listed. I have used his schematics more than once.

https://www.customecm.com/bench-harness ... ss-pinouts