I've figured out that the 99-02 harness have the blue and red connectors
the 03-07 has the green and blue connectors

the stock relating pcm connectors supposedly fit (i have not verified) and the 03-07's have a faster chip and double the memory.

can you use a 03-07 pcm on a 99-02 harness?
will it even work without repining? is there any benefit to using it this way?

 

ok i finally figured it out....

for those who find this buried in a search

this was taken from...... http://forum.efilive.com/archive/index.php/t-10715.html

12200411 may be an F-body and Vette service number only. I think the trucks use a slightly different PCM (different how, I have no clue), and in any case it is the 02 Xpress Van calibration that you need loaded into ANY capable PCM. Someone just figured out the 12200411 will adapt for MANY MANY GM vehicles (possibly the most for one PCM service number).

I'm pretty sure you can use _most_ if not _all_ (but I cannot confirm this) PCM's that are 512k, unless anybody knows of any specific exceptions. (Maybe the 97-98 Vette PCM's? Quite possibly those are no good to use!)

unless I'm mistaken, all 12200411's are 512k, the 97-98 vette PCMs aren't 411's, the number I found for them is #16232148, though that could be wrong, either way, they look quite a bit different than the 411 too.

this is rock auto's list for the 411 PCM usage. I actually think theirs isn't complete, but a good basis. one from any of these vehicles should work, just make sure its actually a #12200411. there are 1mb PCM's from later vehicles which look just like the 411 with different colored connectors.

CADILLAC ESCALADE 2002
CADILLAC ESCALADE EXT 2002
CHEVROLET ASTRO (2001 - 2002)
CHEVROLET AVALANCHE 1500 2002
CHEVROLET AVALANCHE 2500 2002
CHEVROLET BLAZER (2001 - 2002)
CHEVROLET BLAZER TRAILBLAZER 2001
CHEVROLET C3500 PICKUP HD 2001
CHEVROLET C3500 PICKUP HD CHASSIS CAB 2002
CHEVROLET CAMARO SS (2001 - 2002)
CHEVROLET CAMARO Z28 (2001 - 2002)
CHEVROLET CORVETTE (2001 - 2003)
CHEVROLET CORVETTE Z06 (2001 - 2003)
CHEVROLET EXPRESS 1500 (2001 - 2002)
CHEVROLET EXPRESS 2500 (2001 - 2002)
CHEVROLET EXPRESS 3500 (2001 - 2002)
CHEVROLET S10 PICKUP (2001 - 2002)
CHEVROLET SILVERADO 1500 (2001 - 2002)
CHEVROLET SILVERADO 1500 HD (2001 - 2002)
CHEVROLET SILVERADO 2500 (2001 - 2002)
CHEVROLET SILVERADO 2500 HD (2001 - 2002)
CHEVROLET SILVERADO 3500 (2001 - 2002)
CHEVROLET SUBURBAN 1500 (2001 - 2002)
CHEVROLET SUBURBAN 2500 (2001 - 2002)
CHEVROLET TAHOE (2001 - 2002)
GMC C3500 PICKUP HD (2001 - 2002)
GMC JIMMY 2001
GMC JIMMY ENVOY 2001
GMC JIMMY SLS 2002
GMC SAFARI (2001 - 2002)
GMC SAVANA 1500 (2001 - 2002)
GMC SAVANA 2500 (2001 - 2002)
GMC SAVANA 3500 (2001 - 2002)
GMC SIERRA 1500 (2001 - 2002)
GMC SIERRA 1500 HD (2001 - 2002)
GMC SIERRA 2500 (2001 - 2002)
GMC SIERRA 2500 HD (2001 - 2002)
GMC SIERRA 3500 (2001 - 2002)
GMC SIERRA C3 2001
GMC SONOMA (2001 - 2002)
GMC YUKON (2001 - 2002)
GMC YUKON DENALI (2001 - 2002)
GMC YUKON DENALI XL (2001 - 2002)
GMC YUKON XL 1500 (2001 - 2002)
GMC YUKON XL 2500 (2001 - 2002)
OLDSMOBILE BRAVADA 2001
PONTIAC FIREBIRD FORMULA (2001 - 2002)
PONTIAC FIREBIRD TRANS AM (2001 - 2002)