For the Gen IV engines, it seems that one of the better options to use is an E67 ECM. Specifically, it allows you to keep the cruise control without needing to have a BCM. I also believe that the E67 can be used with either a manual transmission, 4 speed auto or a 6 speed auto (depending on the OS your trying to use). To help out, I would like to fill in the blanks on which vehicles came with E67's from the factory.

Note: I tried to break this down by the early E67's and the 2009+ E67's [2009+ E67's have a higher {B4001} Injector Flow Base (7.99999 increased to 15.999998 grams/sec)]

Here's my stab at a list:

2006-2008
CTS-V - 2006+ (LS2 (6.0L)
Hummer H3 - 2008 (LH8 (5.3L))
LS4 FWD (2007 MOnte Carlo, 2007-2008 GP GXP, 2007-2008 Impala SS, 2008 LaCrosse Super Sport)
TB - 2007-2008 (LH6 (5.3L))
TBSS - 2007-2008 (LS2 (6.0L))

2009+
Camaro - 2012+ (LSA (6.2L)
Colorado / Canyon - 2009 (LH8 (5.3L)); 2010-2012 (LH9 (5.3L))
Corvette - 2009+ (LS9 (6.2L))
CTS-V - 2013+ (LSA (6.2L))
Hummer H3 - 2009 (LH8 (5.3L))
Impala SS - 2009 (LS4 (5.3L))
TB -2009 (LH6 (5.3L))
TBSS -2009 (LS2 (6.0L))

Not sure I got the LS4 stuff correct or not. Also would like to verify which transmission were available. I know the TB, TB SS, Colorado/Canyon only got 4 speed autos. Same thing for the front wheel drive. Not quite as sure about the CTS-V's.

As always, thanks for your help in filling in the blanks.