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wldlfnutz
Homer Glen, Illinois
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Joined: 04/12/2004
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We recently changed our tow vehicle to a 2007 Tahoe. This truck has a Tow/haul button, but I’m unsure if you put the vehicle in drive/overdrive and press the tow/haul or put it in 3rd gear. I used to tow with a ‘99 Suburban and always towed in 3rd, as I have always heard that you shouldn’t tow in Drive/ overdrive.
Jim
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Thermoguy
Graham, WA
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Joined: 01/04/2017
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Leave it in Drive and use the Tow Haul mode.
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wldlfnutz
Homer Glen, Illinois
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Joined: 04/12/2004
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Thanks! I appreciate the reply!
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mkirsch
Rochester, NY
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Joined: 04/09/2004
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The owner's manual describes how to use tow/haul mode. To paraphrase: Activate tow haul mode any time you are towing or hauling.
Putting 10-ply tires on half ton trucks since aught-four.
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deltabravo
Spokane, WA
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Joined: 09/08/2003
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Tow haul must isn't a "must use it every time you tow" feature.
It changes the shift points of the transmission, holding each gear longer.
Try it and see what suits your driving style.
I don't always use it when towing or hauling heavy.
2009 Silverado 3500HD Dually, D/A, CCLB 4x4 (bought new 8/30/09)
2018 Arctic Fox 992 with an Onan 2500i "quiet" model generator
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Grit dog
Black Diamond, WA
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Joined: 05/06/2013
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deltabravo wrote:Tow haul must isn't a "must use it every time you tow" feature.
It changes the shift points of the transmission, holding each gear longer.
Try it and see what suits your driving style.
I don't always use it when towing or hauling heavy.
But you’re comparing apples and oranges.
Although, the T/H in the 4L60 is “dumb” by current standards and certainly different than an Alli trans.
To the OP yes it will raise shift points. (“Both” of them, lol, but it doesn’t do squat for sensing when to downshift earlier.) And when accelerating with a trailer hooked up, the trans will shift later even not in TH mode.
IMO it’s actually more useful when not towing to keep the eco minded slush box from upshifting “early.”
But it doesn’t hurt to use TH. In the event you are accelerating very slowly it will hold a gear a bit longer and give you a slightly warm and fuzzy feeling.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold
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