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Basic Vendor- Skid Plates
2007 chevy trailblazer_ls
3,700 Posts
The 32" tires are probably your killer, there... Your 3.73 gears are now 3.55 gears, and 65mph is actually 68mph... Not big differences, but when you're talking about towing a brick, and 60-65mph being the breakover point where wind really starts to have a larger effect, it is a big deal...

A tune with later shifts will cause it to downshift sooner.

A tune will, however, increase your static timing, and should give you more power...

If you're out of warranty, it can't hurt...

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