- how does the tow/haul mode work?
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Jul 25, 2011 at 3:00 PM
FIXITMR
✓Experienced Mechanic
9,989 POSTS
It changes the shift schedule and activates a grade braking feature. For better towing. no OD and harder shifts. you can turn on and off anytime. when on highway turn off so OD works for better mileage.