2017 GMC 6.0 Vortec - Manual Shifting?
I notice when I am towing my RV, my truck seems to try and down shift sometimes when climbing a hill before it should. Do any of you guys manually shift to get more power or save gas in these situalt...
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We own a 2016 Chevy 2500 HD, 6.0/6sp. Tow 12,000 5TH. with trans in tow haul mode and M5. Let the computer do its job. Trans is also equipped with a grade breaking mode and it does work well, had no issues thru the Smokies this past June. Check your owners manual for instructions to insure it is engaged. Happy travel's
