Dealer replaced my EFI tuned PCM... uh oh lol

[AllBlkdOut07]

SES and ABS lights stay on after start up, different issues than when the Parking Brake Light and ABS light would come on after the first driven mile which was 4.88/35" tire/tune related. Unless this WAS the cause of the tune all of a sudden. Won't matter much, the EFI tune was never right to begin with.

So, I DEF lost 100% of my tune now being the whole PCM was swapped out in favor of a new one, diagnosis was a short within the PCM. My concern is, since they are sending my PCM back to GM will they discover the PCM has been adjusted? Or do they just toss these things into a recycle bin? I hope this doesn't affect my warranty going forward for the next 8 months.

I DEF need a BB tune now with an extra OEM PCM to swap out for trips to the dealer for warranty work.

What's the best way to reach BB? I want to get the ball rolling on this. How hard is it to swap out the PCM's? Where is it? Easily accessible under the dash?

I sent Jenna a PM, didn't know how to reach Justin.

[JWolfe75]

[JWolfe75]

tuning@blackbearperformance.com

[AllBlkdOut07]

Hook



me



up



JW

[WildChevys]

i would guess that GM is gonna check it out, but since they already did the job i doubt they are gonna charge now.

[AllBlkdOut07]

N/C, picked the truck up, the tune is long gone obviously, since it's a new PCM, speedo is waaaaay off again, lights come on. Well, now I can get AutoCal and be done with the ECS madness.

[speedracer326]

I honestly think 07 was the year GM became able to see whether or not the PCM was re-flashed even if you flashed it back to stock before hitting the dealer. Why didn't they flash the new one for your gears and tires?

[WildChevys]

because the new tune will take care of that

[HiSpdJunkie]

N/C, picked the truck up, the tune is long gone obviously, since it's a new PCM, speedo is waaaaay off again, lights come on. Well, now I can get AutoCal and be done with the ECS madness.

I have to say that the first trip I took to ECS was great. A week later I blew up my first transmission and it didn't feel the same after that. The second trip I had it tuned for the headers and I blew up another trans but this one was a race built one. Now I feel like it has no balls on the highway.

Moral of the story is ECS does awesome work on Cameros and Corvettes, not so much on trucks. Next time I have money for a tune I want to use BB.

[WildChevys]

i know Krazy House Customs also does tuning with EFI Live and they have a lot more experience with trucks.

[HiSpdJunkie]

This is true James. I always forget about them.

[speedracer326]

because the new tune will take care of that

I realize that, but in the meantime you're SOL. Then again, with 35s and 4.56s you cant be too far off of stock huh?

[WildChevys]

with 35s, and 4.88's your WAY off stock. not even close.

[speedracer326]

My bad, thought I remembered reading 456s which would be off of 3.73s and stock tires by about 200 RPM at 80mph. That thing must actually move out under its own power pretty good with a tune.

[WildChevys]

your talkin about 4.56's he has 4.88's

[speedracer326]

Thank you for pointing out what I had already realized on my last post.

[WildChevys]

no problem, thats why i'm here.

and as far as the speedo and odometer being off, whats the difference it's been wrong for MONTHS, whats another few months.

[speedracer326]

I was under the impression he'd just got this computer replaced. You be here all night?

[WildChevys]

he got the old faulty PCM which was tuned incorrectly with EFI Live replaced with a new one from GM. i intend to be here for a while, yes

[speedracer326]

Very nice. But unless I'm reading this retarded, he just got it replaced.