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Home > Home & Garden > Cars & Trucks   »   2005 GMC Sierra 2500HD Tire Size Changes

 
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Old Sep 10, 2007, 09:32 AM
Marc Hebert
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2005 GMC Sierra 2500HD Tire Size Changes

Can or Will your local GM Dealer change the tire size parameters in your vehicle's computer to accomodate going from stock LT 245/75/16 to larger LT 285/75/16 and will it affect the warranty coverage ? Has anybody gone through this with your dealer ?

Thanks for your response !

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Old Sep 21, 2007, 09:45 PM   #2  
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Hi this is Macksmom's husband I have been a GMC mechanic for years...got bored tonight so logged in here

If you have a 2500HD with an allison transmission, you CANNOT change the parameters, it's a software issue with the tansmission programming.

Other transmissions can be set up to accomodate different tire sizes although you may be charged.

It will not be covered under warranty because you are making changes to the factory settings of the truck.

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Old Sep 21, 2007, 10:29 PM   #3  
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nauticalstar420 agrees: You should create an account. We can always use advice from a good mechanic

Hey girl Yeah I am sitting here while he gets his "fix" on cars lol...I told him how great this site was and to get his own account...so I'm sure he will
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Old Sep 21, 2007, 10:31 PM   #4  
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Quote:
Originally Posted by macksmom
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nauticalstar420 agrees: You should create an account. We can always use advice from a good mechanic

Hey girl Yeah I am sitting here while he gets his "fix" on cars lol...I told him how great this site was and to get his own account...so I'm sure he will
LOL thats funny. Of course it all sounds like gibberish to me, thats why i know he has to know what he's talking about..lol.
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Old Sep 21, 2007, 10:42 PM   #5  
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Originally Posted by nauticalstar420
LOL thats funny. Of course it all sounds like gibberish to me, thats why i know he has to know what he's talking about..lol.
yep...he got bored, and knows I am addicted to this site...so he was like "hey check out car questions" lol....I know NOTHING about cars....then he started answering every friggin question that had to do with cars....I told him he needed to create his own account so people don't start asking me about cars! LOL
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