Tow haul mode
I am sure this has been discussed before, but who uses it and how? I have a 1 ton diesel dually and will be towing a 5500 lb (dry) trailer. I am assuming it will lower fuel economy? Am I correct in as...
Forum Discussion
My TV is a 2002 Suburban 2500 with 8.1 L engine. My owner's manual says to use T/H only when towing at 75% or more of GCWR. On a previous trip I used it even though I was below that weight. Engine was winding out a bit in all gears including top. It didn't just change the shift point. Gas mileage came out to about 7 3/4 MPG. Then I looked at manual and saw the recommendation. Most recent trip I didn't use it (and didn't miss it). MPG was around 11. Obviously a huge difference. No noticeable difference in tranny temp. In the future I'll only use it in steep mountains if necessary. I tow about 6000 lbs.
