2003 Avalache
We just bought a 2003 Chevy Avalanche 2500 8.1L - Do not now the gear ratio.. Standard Towing -10200 lbs Standard Payload -2146 lbs Standard GVWR - 8600 lbs Cargo is 2 adults(350lb, 2 dogs(130lb...
Forum Discussion
A 10,500 tow rating would indicate a 3.73 rear axle. I get 8 mpg towing our 8500 lb TT, you will likely do a little better with the 3.73. I get 10 around town and 12 on a good day with the wind at my back. You will enjoy towing with the 8.1.
