MrBill
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The 2500 makes an excellent high end towing machine. I know when I ordered my Avalanche I had a choice of gears 3.73 Vs 4.10. I will explain what I chose and why.
The Vortec 8100 V8 SFI engine in the Avalanche 2500 delivers 340 horsepower @ 5200 rpm and 455 lb.-ft. of torque @ 3200 rpm.
Below is what you can tow. Depending upon you configuration.
8.1L with 3.73 gears can tow 10,100 lb. or with 4.10 gears you can tow 12,000 lb.
My travel trailer is 34 feet long and weighs 6,354 lb. With an axle weight of 4,644 lb.
I chose the 8.1L with the 3.73 gears. The reason was simple. With all that horse power you can easily move a trailer as large as mine. You will get better gas mileage because of the lower RPM. Let me explain I will keep it very simple. This is just an example so please excuse me if I am off by a few hundred rpm.
Say you are traveling at 60 mph. The RPM with the 3.73 gears should read around 2200, With the 4.10 gears you will see the RPM around 2500. You say not a big difference, Try traveling 4,000 miles in one trip. You can see the dollars you can save.
Mr. Bill
P.S. Always use the Tow/haul button when towing.
The Vortec 8100 V8 SFI engine in the Avalanche 2500 delivers 340 horsepower @ 5200 rpm and 455 lb.-ft. of torque @ 3200 rpm.
Below is what you can tow. Depending upon you configuration.
8.1L with 3.73 gears can tow 10,100 lb. or with 4.10 gears you can tow 12,000 lb.
My travel trailer is 34 feet long and weighs 6,354 lb. With an axle weight of 4,644 lb.
I chose the 8.1L with the 3.73 gears. The reason was simple. With all that horse power you can easily move a trailer as large as mine. You will get better gas mileage because of the lower RPM. Let me explain I will keep it very simple. This is just an example so please excuse me if I am off by a few hundred rpm.
Say you are traveling at 60 mph. The RPM with the 3.73 gears should read around 2200, With the 4.10 gears you will see the RPM around 2500. You say not a big difference, Try traveling 4,000 miles in one trip. You can see the dollars you can save.
Mr. Bill
P.S. Always use the Tow/haul button when towing.