don teeter

Does anyone have PCM serial number decodes?

Bo185

One way to tell year is by the connectors at the PCM. 99-02 RED/BLUE connector and 2003-2007BLUE / GREEN PCM connectors.

As for the PCM the Service numbers

PCM ID Service# Year(s) used Engine and Platform
16238212 1997-1998 LS1 5.7L
09254896 1999-2000 4.8, 5.3, 6.0L
09354896 1999-2000 LS1 5.7L
12200411 2001-2003 4.8, 5.3, 6.0L LS1/LS6
12576106 2003 4.8, 5.3, 6.0L
12586242 2004 LS1/LS6
12586243 2004 4.8, 5.3, 6.0L
12598343 2004 6.0L GTO & SSR
12589463 2005-2006 4.8, 5.3, 6.0L
12597191 2005 LS2 6.0L Corvette
12597883 2005 LS2 6L Corvette,GTO,SSR
12583560 2006 4.8, 5.3, 6.0L
12583561 2006 4.8, 5.3, 6.0L
12596679 2006 SSR 5.3L
12603892 2007 LS2/LS7
12597121 2007 4.8, 5.3, 6.0L

poconojoe

iTrader: (43)

They're the service numbers, not serial numbers, but that might be what he's looking for.

By the way
12598343 2004 6.0L GTO & SSR
2004 GTO's were 5.7 and used service number 12586243 PCM's

dkiller2135

Do have to use the ECM that match your harness?

Ive got a 1999 LQ4 harness pinned for a 09254896.

The PCM that came with it is a 09354896 (1999-2000 LS1)

Does the harness need repinned or another PCM installed?

TipsyMcStagger

iTrader: (1)

Totally random post but the the sake of the archives and anyone who might be searching in the future, my 2006 GTO LS2 E40 PCM is also Service #12596679 (in addition to the 2006 SSR 5.3L listed above).

Tipsy