Refer back to post #8 & get the 3500 then it won't make much difference whether 3.73 or 4.10 gears.
I've had several GM trucks to tow with (1/2, 3/4, 1 ton), all had 3.73s, all did a great job with decent fuel mileage empty & towing.
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Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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