[Martinjlm]

Originally Posted by PDXSSCE

I was about to begin a new thread, then decided to post the inquiry in the knowledge thread.

I understood that the LaCrosse second generation (2010–16) had the Epsilon II platform, which was replaced with the third generation (2017-19) E2XX platform.

Although, I read that the third generation had the P2XX (longer) platform. It doesn't make sense, because the LaCrosse had the same wheelbase as the Impala.

Additionally, I understood that the Impala tenth generation (2014–20) had the Epsilon II platform.

Now, I read that it had the Epsilon II platform in 2014-15 and switched to the E2XX platform in 2016.

What are the facts?

E2XX is a program identifier. E = Epsilon 2= 2nd generation of the platform 1st X= body type, 2nd X = brand. So E2SC would be a Chevrolet Malibu Sedan on second generation Epsilon.

Impala, Lacrosse and Cadillac XTS were built on a long wheelbase variation of the Epsilon platform. I remember that the XTS program code was P1LL. Easy for me to remember because it spells pill and i used to refer to it as the pill. I can’t remember if Impala was P1LC or E1LC. Technically, either could have worked. I’m pretty sure Lacrosse was E2LB. Regal was E2SB.