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Old 01-04-2021, 08:32 PM   #8
Bob Don
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Default Re: Chevrolet 8.1 Vortec advice
I had a 2002 2500HD 2wd with Allison tranny and 8.1 vortec. I got right around 10mpg towing about 8K #s. The tranny temp would go up a little going up hills but nothing too bad. When conditions allowed, I ran around 75 mph with the trailer with no issues.
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