Because the vette came out in 2005, 2004 if you count the caddy XLR.Originally Posted by kidturbo
SSDOS
OS 12628982
World Manufacturer Index 2G1 General Motors Chevrolet - Canada
Year of manufacture 9 2009
Model WT Impala LT 3.5 Sedan
Engine K LZE, L36, L36, LEA
Engine size K 3.5 litre V6 SFI, 3.8 litre V6 SFI
Well that pretty much covers the V6 Impala's.
Ok Ben, your turn to show an "Early model" GMLAN example we can compare with.
I'm gonna go out on a limb here and say, it's a Vette thing. The BCM in the Vette's from 6-12 doesn't look anything like ones in other GM trucks or cars I've seen. More like a SAM module found in MB or other German chassis. If this protocol difference was only release date related, why didn't they upgrade the Vette's? Hardware supplier contracts maybe?
So that very early introduction of GMLAN on the 04 XLR/05 vette was 2 years before GM introduced "common architecture". Common arch was the first GM car/truck electrical architecture that was 100% GMLAN, using GMLAN on the interior and completely abandoning Class 2.
They called it common-architecture because 95% of all the modules were all the same regardless of car/truck/SUV...just different trim plates to accommodate different dash/interior designs. The common-arch era/generation Caddy DTS, CTS, acadia, silverado, tahoe, impala, express van etc all use the exact same door modules, HVAC modules, switchgear, radios, RCDLR, RPA, BCM, CAN messaging etc.
Why GM's first foray into CAN used the older ID subset, and then they retired it on new platforms 1-2 years later when common arch began to be rolled out....I have no idea.
CAN wasnt on the 05 Impala. It started in 06.
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