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Dealers Checking On People Doing Tunes?

sierra20076.0

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VMax2007 Senior Enthusiast

VMax2007

Posted
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Interesting.

 

I'm glad I decided to keep my original stock ECM/TCM.

 

I will say this though. If GM decides to find a way to eliminate the ability to tune future vehicles and they continue to over-use TM and all of the other "Nannies" that made my truck run like a 1974 Vega. They WILL lose my future business, and I am a lifetime GM guy.

asilverblazer Senior Enthusiast

asilverblazer

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I think if they are going to warrant these trucks they should have the right to protect what they are warranting. I don't think they should make it impossible to tune them, but I don't think they should have to warrant a tuned truck. Well except for things that are not affected by the tune. (Ball joint, door hinge, leaf spring, etc...)

VMax2007 Senior Enthusiast

VMax2007

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I think if they are going to warrant these trucks they should have the right to protect what they are warranting. I don't think they should make it impossible to tune them, but I don't think they should have to warrant a tuned truck. Well except for things that are not affected by the tune. (Ball joint, door hinge, leaf spring, etc...)

 

True, but from the sound of it, tuning even after warranty may be impossible in the future. Also, If GM doesn't want people tuning their trucks, maybe they shouldn't program the stock tunes to make a 350+ HP engine fall on it's face and run like a worn out Vega. Mark my words, if they continue to do this and make tuning impossible, they will lose ALOT of business. Mine included.

jhm Senior Enthusiast

jhm

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I never was able to relate to what people say about TM causing the truck to underperform. My truck does not have a custom tune and I have never had a problem with acceleration lag, problem passing, etc. Actually, if I slam it from a dead stop it will smoke the tires. When I am driving along at say 30 mph and hammer it, the acceleration is awesome. My truck is an '01, did they put more control on TM after this year? It would be interesting to find out which years started needing tunes to run "non-nanny".

VMax2007 Senior Enthusiast

VMax2007

Posted
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I never was able to relate to what people say about TM causing the truck to underperform. My truck does not have a custom tune and I have never had a problem with acceleration lag, problem passing, etc. Actually, if I slam it from a dead stop it will smoke the tires. When I am driving along at say 30 mph and hammer it, the acceleration is awesome. My truck is an '01, did they put more control on TM after this year? It would be interesting to find out which years started needing tunes to run "non-nanny".

 

 

GM trucks started using DBW (Drive by Wire) in 2003. TM did exist prior to 2003, but not anywhere near it's current use. Plus, GM has since added all of the other E-Nannies that basically decide for you how to accelerate, etc.

 

My 2000 also smoked the tires from a stop and I had no issues with TM either. Go drive a new one sometime.

VMax2007 Senior Enthusiast

VMax2007

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I wonder why Ford, Dodge, and Toyota haven't done the same then??

 

All mfrs use TM to some extent, GM just decided to over-use it and take it way beyond reason with all of the other E-Nannies.

Bish Senior Enthusiast

Bish

Posted
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I never was able to relate to what people say about TM causing the truck to underperform. My truck does not have a custom tune and I have never had a problem with acceleration lag, problem passing, etc. Actually, if I slam it from a dead stop it will smoke the tires. When I am driving along at say 30 mph and hammer it, the acceleration is awesome. My truck is an '01, did they put more control on TM after this year? It would be interesting to find out which years started needing tunes to run "non-nanny".

 

All I can say is if you go with a custom tune, YOU WILL DEFINITELY KNOW HOW CRIPPLED THE ORIGINAL WAS. I was ok with my Tahoe when I bought it. After a tune, it felt like a totally different vehicle and then I KNEW how crippled it was from the factory.

 

Regarding GM, I agree they should be able to tell if tuning caused the failure and they should not have to honor it. However, if they can't prove the tune caused the problem, it should nnot effect warranty INO. Kind of like the Magnus-Moss act regarding warranty. They should not be able to deny a warranty claim unless it is proven to be the cause.

 

If GM decided to prohibit changes, I may consider other brands. We are an ALL_GM family now but that could change.

sablowme Enthusiast

sablowme

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Ya know its weird, depending on what dealer you go to the difference of warranty strictness changes. Some dealers don't mind and will fix the problem without worrying about your custom tune.. Gm warranty admin says Its not the tune or the after market part that hurts your warranty its usually your excessive driving habits that kill it. There again if you remember the Mangusan moss act it states..somewhere that " just because a after market part is installed on a vehicle does not mean that your new vehicle warranty is void, they have to decide that the after market part is the cause of the failure first"

 

then again who has money to fight Gm on this. But i also am with you guys, i believe gm should continue doing what its doing and not warranty the trucks all beefed up but with a technical reason not just "we cant help you"

I would also like to see them delete the TM as well or tone it back cuz after you drive a couple of other trucks that don't have it as bad makes you mad at your chevy or gmc

alaska511 Senior Enthusiast

alaska511

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Interesting.

 

I'm glad I decided to keep my original stock ECM/TCM.

 

:D I saw this coming a mile away. As posted in a prior thread, I curently program many mfrs PCMs, TCMS, CPCs etc for diesels and HD transmissions and they all have an of an audit trail in my programming station.

Even though many tuners we use here on this site touted that GM couldn't spot this, it was only a matter of time until they could.

tobias Senior Enthusiast

tobias

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So, would using separate modules solve this problem? If so, this doesn't seem to be a huge issue, might just cost a guy a few hundred more bucks.

udeleon Enthusiast

udeleon

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Random Question:

I know just about all hard drives including flash drives have a limit to how many times you can write to it. Although it's WAY up there, they do add up and can reach their limits as this includes additions, deletions, of files etc...

 

How many files actually make up our factory tunes? How many files are written and removed while "re-programming"?

 

Do our ECM's have a limit to how many times you can "reprogram"

gvbhunt Enthusiast

gvbhunt

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I wonder about something. HPTuners has the ability to write the cailibration data as well as write the ENTIRE ECM/TCM back. Would this eliminate this problem? Instead of having software with little changes here and there, if you wrote the ENTIRE stock program back would it keep them from seeing this? I do not tune my truck for crazy performance as some others have been able to do, I just tweak it a bit to my liking. Technically my engine does not make any more power than it did when it was purchased, it just is able to use it instead of falling on its face.

alaska511 Senior Enthusiast

alaska511

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So, would using separate modules solve this problem? If so, this doesn't seem to be a huge issue, might just cost a guy a few hundred more bucks.

 

 

yes, you can purchase both of them on ebay for $200 right now, but you would need your factory calibration and I have no clue what that would run. GM dealer prices are high for factory modules, $345 for PCM and $115 for TCM

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