cobalt20yellow

Ive got a Gm stage 3 pcm looking to trade this for a stage 2 or aftermarket pcm that is open or sell it i want to do a custom tune on an UNLOCKED pcm...have custom things done want a custom tune...although the gm stage 3 tune..is VERY GOOD...afrs solid 14.5 daily driving and on hard pull SOLID 12-11.7...but i want to custom tune like i said and have an open setup that i can get into...
any ideas, comments whatever id appreciate them

(i can also do deals on stock pcm that i dont want anymore trade sell this one also prolly)

Sizzle06

iTrader: (4)

I think trifecta can unlock it for you.

cobalt20yellow

hmm..didnt know that, thanks. what i was told is that there is like no way to get inside it because gm was all secretive about what the tune was but ill look into it thanks, how much would it be to unlock you know? be cheaper just to tune a stocker and reflash to the stage 3 parameters??

SS_NH

iTrader: (4)

I have a random LJS pcm sitting around, guy I bought it off said it had a tune on it.
Idk what year its for tho.

Erick161

Does it matter? Can you use an 05 in an 07? Sounds like a stupid question i guess, but i wasnt aware there was a difference. I have a spare PCM laying around and i hadnt even thought of the possibility that it wasnt compatible with my car.

And how can you tell?

SuckMyBalts

iTrader: (-1)

If you get a pcm you will need to change the vin with hptuners otherwise the car won't start.

Staged07SS

iTrader: (25)

They sure can.

Pyros777

iTrader: (4)

This is false. I've run PCMs with VIN's of all years in my car. You're probably referring to the security relearn.

Erick161

Ok, so I can run an SS SC PCM in my 07, regardless of year PCM, no problem? Can the dealer address any relearn? Like the case relearn or VIN swap? Hell, or even ZZP? I'm sending them the spare one to flash their can tune in

SuckMyBalts

iTrader: (-1)

Sorry for the misinformation, I was talking about the relearn my bad man!

Have you tried to write the entire file to the pcm? It usually takes a bit more then a failed write to brick a pcm. I have failed many writes and just re do it without an issue. If the vin thing pops up I simply close everything on hpt, reboot it and then turn the car off open the door, close it and put the key to run and re-do it.

I am kind of "specific" though with my tuning and do all sorts of weird things in an order lol. Opening the door after each tune, turning the car on and off, blah blah blah.

Pyros777

iTrader: (4)

You can run any P12 PCM in your car, as long as its reprogrammed for your car of course.

If you get a PCM from an 05 or early 06 SS S/C and just change the VIN though, your fuel gauge will read backwards.

If you're going to get it reprogrammed anyway, then this is a list of cars that came with the P12:


Anyway, to the OP: I'd suggest getting the Trifecta unlocked GMS3. It re-enables the A/C and makes the PCM readable/writable by HP Tuners. Feel free to PM me or check the link in my sig for more info.