Thread: GM8100 & Allison experience ?
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Old 09-29-2021, 03:14 PM
jerry455 jerry455 is online now
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Join Date: Oct 2007
Location: sterling hts mi
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My buddy has a 2004 GMC Sierra 2500 with that powertrain and he loves it. Fuel economy is not great but it sure pulls nice. He has not had an trouble with his. He maintains his vehicles well and has over 100,000 miles on it.

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