So, here's what I've learned last night/today. My E67 (GM PN 12636660) started life intended for 07-08 Hummers. I think it's true that 07-08 E67s are incompatible with OS's written for 09+ E67s.
Given that, it seems I'm stuck. Getting a later E67 and a newer OS (like from a ZR1) is beyond my current abilities, I think.
I have read that HPTuners has an OS patch to support PWM fans, but I can't seem to find any such animal.
Anyway, that's the situation as I see it. Am I wrong? Would it be doable to get GM's ZR1 tune working with my crate motor LS9 if I got a newer E67?
Paging Dave Mikels, paging Dave Mikels. Dave Mikels to the E67-challenged section, please!
thanks!
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