Chevy_tuner

iTrader: (1)

I have a 2010 RPD SS with a PCM locked via Trifecta. Looking for a stock PCM please. One that isnt locked ofcoarse.

Thank you.

soundjunky

iTrader: (4)

you would need to get any replacement PCM reflashed for your car;
the PCM (aka: ECM) neess to communicate with the BCM, and if there is any inconsisancy, then the car will not start.

You're probably going to need access to a Tech2 ~ maybe booking in at a dealer, to unlock things...
(but they might also put hte stock/updated tune for your car while they're at it.)

Unfortunately this is not an OBD1 or early OBD2 car which would permit swapping ECM's without hassel...

Cobra2255

Just wandering how offten dose this happen to ppl?

Chevy_tuner

iTrader: (1)

Okay so just to confirm. To remove my Trifecta tune off my PCM

i need to go to the dealer

have them flash in a file from another year SS

flash back in my stock file

then do the clutch relearn procedure

soundjunky

iTrader: (4)

To simplfy things for reasons of understanding;
1) forget what "Tune" is on the ECM;
2) Unless the ECM is programmed with your car's VIN, it's going to need to be unlocked.
3) To unlock an ECM (to the best of my knowledge) you need access to a Tech2

Why are you talking about a clutch relearn?

Chevy_tuner

iTrader: (1)

I searched and the thread that I found that soulution ended with a cluth relearn.

Basically the guy had taken it to the dealer and had issues getting hptuners to read.

So he finally had them flash a 2010 SS file on his 2008 SS. Then after that flash his stock file on.

Then Hptuners would read but the car wouldnt start.

Then he posted later it was a clutch relearn he had to do to get it to start. He even stated Vince helped him find a solution to this.

I have a friend that works at GM, so access to a Tech 2 is not a problem.

I also have HPtuners but I just want to confirm the above process before I under go it since the Cobalt is currenlty my daily driver to get to work and back.

soundjunky

iTrader: (4)

I'm glad you got it figured out!

I need a tech2.

Chevy_tuner

iTrader: (1)

Well I have yet to attempt it. I just wanted to see if more than one person have tried this process.

Im going to remove my K&N SRI today unitl I get a downpipe. I refuse to update my trifecta tune. I want a HPtuned PCM.....so i can use my hptuners.

So back to the stock filter box with k&n drop in filter for now. Car runs great no doubt but i did still log KR.

Could be LNF false KR. I havent had a chance to see how my knock sensors are clocked.