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Thanks again Taz.

A clarification, though it's not actually material: The transmission/TC is actually not from the donor pickup. It's assembled from rebuilt 70's era components. I'm not overly...

Great info Taz, thank you! I'll follow up also to your message on my question in the Conversions forum.

That's two parts of the info I really needed:

1. There are different 1Mb PCMs within the...

Hi Erik, GAMEOVER,

I keep neglecting to say clearly that this is definitely a Silverado Classic... that is, LS1 not E37, and I suspect it's identical to the 2006. I just don't know for sure that...

No, it's not drive by wire. Standard cable-driven throttle body. I've wondered if any of the V6'es got DBW, but this one for sure isn't.

Hi folks,

Can someone answer a LS1 PCM hardware/os compatibility question for me?

Can I do a full reflash and put a 2007 OS and tune on a 2003 1Mb PCM?

Does anyone know if all of the 1mb...

Thanks Erik.

I'm going to have to learn a little bit to get a good tune going. I already know that I'm going to have to compensate for:

- no VATS (trivial)
- no cats or post-cat O2s (off-road...

My memory from bench to web is bad...

The 2006 tune I found is from a GMC Sierra 1500 4.3L V6, not from an Express Van. The Express Van was one of the physical PCMs available locally for...

Erik,

Thanks, that would be good news if the 1mb PCMs are all physically the same, and can be interchanged by flashing a new OS on them. Sounds like you suggest I wait till someone else agrees...

Hi Erik,

Thanks... I wasn't very clear in my description, sorry. I've confirmed from the VIN code that the engine is from a Classic, and used an LS1 PCM.

I've done a bit more research and I...

I'm swapping a 4.3L V6 from a 2007 Silverado Classic (Gen III) into an old Volvo C303 military vehicle. The mechanical work is all done. I'm trying to sort the EFI, and I could use a little help. ...