My GMC is a dog.

Akkeith · 11-01-2009, 03:36 PM

Why is my 09 Sierra 2500HD 6.0L such a dog? When I go to pass another vehicle first there's a pause then it has no acceleration. When it reaches higher RPM's it acts like its got some power but when I punch it going 55mph it acts like I have a six cylinder. My 04 2500 was quick off the accelerator and pushed you back in the seat. Is this something from the factory? Can I do something about it? Thanks for any help.

mudseeker · 11-01-2009, 03:57 PM

$300 custom tune from nelson performance to have the torque management taken out completely or reduced along with gaining a little hp.

Akkeith · 11-01-2009, 04:40 PM

Quote:

Originally Posted by mudseeker

$300 custom tune from nelson performance to have the torque management taken out completely or reduced along with gaining a little hp.

Mudseeker, not to be dense but what exactly is torque management?

mudseeker · 11-01-2009, 05:15 PM

it is a calibration built into the PCM (powertrain control module) or TCM (transmission control module) if your truck is equipped with a separate ECM (engine control module). GMs way of controlling all that horsepower the LS motor is capable of putting out.

betcha can't do burnouts either. get a tune and you will.

Akkeith · 11-01-2009, 05:21 PM

Thanks for the explanation. Why do they do that, you would think they'd want the best performance right out of the factory. Will a custom tune void any warranty?

mudseeker · 11-01-2009, 05:37 PM

no way for the dealership to know you have it unless you tell them.

the 6.0L is capable of 350+ hp out of the factory, you don't need that much as a daily driver, so GM de-tuned it. GM puts the LS engine base in everything from trucks to the corvette and each one is tuned to match the purpose of the vehicle it is in.

Akkeith · 11-01-2009, 05:41 PM

Thanks again! Custom tune it is.

11-01-2009, 03:36 PM	#1
Akkeith Full Member Join Date: Jul 2008 Posts: 21	My GMC is a dog. Why is my 09 Sierra 2500HD 6.0L such a dog? When I go to pass another vehicle first there's a pause then it has no acceleration. When it reaches higher RPM's it acts like its got some power but when I punch it going 55mph it acts like I have a six cylinder. My 04 2500 was quick off the accelerator and pushed you back in the seat. Is this something from the factory? Can I do something about it? Thanks for any help.

11-01-2009, 03:57 PM	#2
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,374	$300 custom tune from nelson performance to have the torque management taken out completely or reduced along with gaining a little hp. __________________ i'd rather be hunting

11-01-2009, 05:15 PM	#4
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,374	it is a calibration built into the PCM (powertrain control module) or TCM (transmission control module) if your truck is equipped with a separate ECM (engine control module). GMs way of controlling all that horsepower the LS motor is capable of putting out. betcha can't do burnouts either. get a tune and you will. __________________ i'd rather be hunting

11-01-2009, 05:37 PM	#6
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,374	no way for the dealership to know you have it unless you tell them. the 6.0L is capable of 350+ hp out of the factory, you don't need that much as a daily driver, so GM de-tuned it. GM puts the LS engine base in everything from trucks to the corvette and each one is tuned to match the purpose of the vehicle it is in. __________________ i'd rather be hunting

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11-01-2009, 05:21 PM	#5
Akkeith Full Member Join Date: Jul 2008 Posts: 21	Thanks for the explanation. Why do they do that, you would think they'd want the best performance right out of the factory. Will a custom tune void any warranty?

11-01-2009, 05:41 PM	#7
Akkeith Full Member Join Date: Jul 2008 Posts: 21	Thanks again! Custom tune it is.