Hello everyone. I've been hard at work lately on 2006-2008 3800 Grand Prix computer tuning

As most who own an 06+ 3800 Grand Prix know, you have non reprogrammable PCMs. At least, you did.

I'm very excited and pleased to post that I'll be offering a proper tuning solution for 06-08 GPs using your original PCM modules. What this means is:
-no more searching for 2005 PCM modules
-no more non-returnable computer cores
-no more extra expense just to make your vehicle tuneable.

You'll be able to purchase an Overkill PCM tune, receive a 06+ PCM module that's been reprogrammed, and send back your old module for the core charge refund.

Also, 2007-2008 owners, you'll be pleased to know that I've been able to correct the operation of the fuel gauge on your vehicles with an aftermarket tune, so when you purchase an Overkill PCM for your 07-08 you'll receive a PCM that won't cause your fuel gauge to read backwards.

All of this announcement is exclusive to Overkill Motorsports. I've worked very hard lately for 06+ owners to provide better tuning solutions.

If you've purchased a 2005 based Overkill PCM for your 2006+ vehicle in past, stay tuned, I'm going to see what I can work out to allow you to return your 2006 computers for at least a partial core charge refund regardless of when you purchased. Please email me willoverkill@gmail.com if you'd be interested in this.

My website will be updated shortly with the changes! :: Overkill Motorsports ::

Any questions please post or email. As always, I appreciate the business from fellow W-Body owners!

Best Regards
- Will

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I'm pretty sure today is not April 1st so its not a gag.

Dude you have become my new hero.

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2007 Pontiac Grand Prix
CAI, HV3, ER Rockers, PLOG, Overkill Tune
http://www.cardomain.com/ride/2990036

lol would I do that? No its not a gag, I had a customer this afternoon running his 2006 GT on a programmed 2006 module.

I also had a very kind gentleman come for an in-car tune about a month ago and allowed me almost 3 hours of swapping PCMs back and forth and reprogramming and filling up at a gas station inbetween in order to recalibrate the 07 gas gauge once I figured out how. Its definitely backwards compared to -06 but I got it sorted

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its no joke, Will tried it out in my car, and it fired right up and we went for a spin. no problems at all. his tunes really wake up the car. Good work Will!

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Mine: Black 06 GP GT, TOGS, Overkilled PCM, 1.9 rockers, Wizair CAI, Thrasher MPS, GMPP STB's & T/A's, F-Bodies...so far thats it...

Hers: Red 2011 Cruze LTZ turrrrrrrbo, stock and mad slow.

Nice going.....Oh Canada........

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2005 GT owner [Non S/C] with a "big DIC".
Two years later and I still love the car.
Thanks Pontiac...Bleen is keen!

is there any issues with the TPMS not working after installing the retuned PCM? 06+ GP's

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2007 Pontiac Grand Prix
CAI, HV3, ER Rockers, PLOG, Overkill Tune
http://www.cardomain.com/ride/2990036

Not 100% certain yet but the TPMS is in the BCM not the PCM if I recall correct. TPMS is in 08 only or other years?

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07 for sure, if it is in the BCM then disregard my question

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2007 Pontiac Grand Prix
CAI, HV3, ER Rockers, PLOG, Overkill Tune
http://www.cardomain.com/ride/2990036

I believe thats only GXP related

About time some broke the 06+ PCM

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Why have more money than brains? Cuz RACE CAR :

this is huge. i have got to figure out how to get this sh!t going on my '07 pcm

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'07 GP Base SD Headers - hv3 - open cone - HPTUNERS user

Will . . . . YOU DA MAAAAN! That's really awesome that your working hard to make legitimate progress with a "dead platform"
Kudos to you!
FWIW I'm pretty sure my 04comp g has TPMS(ever since i put afterket wheels i get "check tire pressure" on the DIC)
i've got a spair 06 pcm i'll PM ya about

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Comp G: 3.2-E85-65's-headers-rockers-104's-DHP tune & "other stuff that doesn't matter"

My 04 CompG didn't have TMPS, it just went based on tire rotations. When I put my 18s on, I remember resetting the tire check system in the DIC and it cleared the message. 08s probably have TMPS, I believe that's the year they were standard requirement by law? GXPs probably had them but again I'm pretty sure that's body control module, not affected by the ECM/TCM in their case.

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my 06 has it, i lost it when i swapped in the 05 PCM, and now i can get it back

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Black 06 GP GT
S2 IC, 1.9 Rockers, TOG Headers w/ full custom exhaust, CAI, 104 Autolites, Custom Tuned PCM, 3.3....
And still Working its way up....

GTPmchn, what shows up on the dash? Do you get any codes?

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I emailed u and never got any reply, for a new PCM purchase
everything shows normal, but when u try to reset it nothing happens, and it doesnt actually sense that the tires are loosing pressure, so it just sits there to look pretty LOL

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Black 06 GP GT
S2 IC, 1.9 Rockers, TOG Headers w/ full custom exhaust, CAI, 104 Autolites, Custom Tuned PCM, 3.3....
And still Working its way up....

04-06's used the "dumb" TPMS and just counted number of rotations via the wheel speed sensors, as Will said. There are no actual pressure sensors in the wheel itself like the 07-08. You have reset the system (while in park and go through the DIC menu, you can't just press the back arrow cause that only removes the message until next startup).

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Dubs:00 VW GTI VR6, Low and Slow 91 VW GTI 8v, Shave the Bay!! 91 VW Cabriolet 8v, bitch Basket
GP's:04 GP GT, Past now G-Ma's Girlfriend's 97 GP GT, "Project Pink Power"

Mine is an 05 and has the sensors in it along with the system.

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2009.5 SBM G8 GT
November 2011 Car of the Month

this new pcm is unlocked right?

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2007 Pontiac Grand Prix
CAI, HV3, ER Rockers, PLOG, Overkill Tune
http://www.cardomain.com/ride/2990036

^Ooooh good question. could a guy with dhp or hp tune it once you unlock it?

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Comp G: 3.2-E85-65's-headers-rockers-104's-DHP tune & "other stuff that doesn't matter"

that would be nice to know

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2007 Pontiac Grand Prix
CAI, HV3, ER Rockers, PLOG, Overkill Tune
http://www.cardomain.com/ride/2990036

This is kickass!
That's great news for the guys/gals that picked up '06+ GPs

I'd also like to know if they will be unlocked, so they can be taken farther.

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No trees were destroyed for this message.
However, a great number of pixels were extremely inconvenienced.

I believe in dragons, sane women, & other mythical creatures.

has anyone heard back from this guy?

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Black 06 GP GT
S2 IC, 1.9 Rockers, TOG Headers w/ full custom exhaust, CAI, 104 Autolites, Custom Tuned PCM, 3.3....
And still Working its way up....