> If you can't read the tag on the rear end, you can do a quick and dirty
> guesstimtae by counting the number of times the driveshaft turns to make one
> revolution
It's gonna be 3.73-ish or 4.10-ish, I'm guessing.
The chassis and powertrain are the same either way, but the GM tow
rating is based on what the engine can pull.
Know from personal experience that combo will pull a 6000lb (steel-frame
wood-deck open car trailer with 3500 on the trailer plus a bunch in the
bed) over the lumps between California and Oregon quite handily with the
4.10.
My '03 2500 Suburban 4x4 with the 6-liter LQ4 is rated at something like
7500lb with the 3.73 it's got, and 11K with the 4.10, the
chassis/brakes/cooling are the same, it's all about the ability of the
thing to get out of its own way when loaded. The 6-liter LQ4 doesn't
mind having the crap beat out of it, but sometimes you really do have to
beat the crap out if it.
Shame they never offered the damn Sub with a Duratec. Swap cost is
prohibitive, an Edelbrock TVS1900 blower for the LQ4 is $5K-ish but it's
got 150K miles on it so...
John.
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