Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

02 duramax P1621

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Old Sep 14, 2010 | 07:32 PM
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Default 02 duramax P1621

on my edge tuner it says TCM long term memory it sent my trans in limp mode once after i shifted down manually when in tow haul it didnt want to shift down on its own. No big deal just cleared the code and kept driving. The code comes back right away no mater what power level im in even stock. Fixing to replace it but was woundering if the TCM is vin specific. If anyone knows it would sure help. Thanks
 

Last edited by 02DURAMAX; Sep 15, 2010 at 07:27 PM. Reason: forgot word
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Old Sep 26, 2010 | 09:10 PM
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contact: kennedydiesel.com he is a pro at command modules.
 
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Old Sep 30, 2010 | 05:41 PM
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thanks acdc ill get in contact with them
 
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