Tow haul button
I have a 04.5 duramax 3500 and I'm not sure when to use the tow/haul button on my gear shift also using this will it help my MPG? Thanks.
Forum Discussion
The owner's manual for my 2002 2500 Suburban with 8.1 liter recommends using tow/haul when towing 75% or more of GCWR.
I just finished a trip during which I was under the impression that tow/haul should be on whenever towing, regardless of weight. I tow a Hybrid Roo 233S at a weight I believe is around 5500 lbs loaded (ballpark anyway). At one point I forgot to engage tow/haul mode. I didn't notice for about 20 minutes or so. Maybe more. I didn't notice any change in driving or handling. Engine temp and tranny temp both stayed low. I began to experiment. The shift points were stretched out a little in tow/haul. I noticed that at 55 MPH I'd be at 2300 RPM in tow/haul and 1800 w/o tow/haul. Seems that for me, tow/haul is doing nothing but wasting gas. Although there were no steep hills involved; I guess that could change things a little.
Seems like cruise control is fine until you hit hills. My guess is that 50 MPH up the hill and 60 MPH down the hill works out to same average speed but uses less fuel.
Thoughts anyone?
I just finished a trip during which I was under the impression that tow/haul should be on whenever towing, regardless of weight. I tow a Hybrid Roo 233S at a weight I believe is around 5500 lbs loaded (ballpark anyway). At one point I forgot to engage tow/haul mode. I didn't notice for about 20 minutes or so. Maybe more. I didn't notice any change in driving or handling. Engine temp and tranny temp both stayed low. I began to experiment. The shift points were stretched out a little in tow/haul. I noticed that at 55 MPH I'd be at 2300 RPM in tow/haul and 1800 w/o tow/haul. Seems that for me, tow/haul is doing nothing but wasting gas. Although there were no steep hills involved; I guess that could change things a little.
Seems like cruise control is fine until you hit hills. My guess is that 50 MPH up the hill and 60 MPH down the hill works out to same average speed but uses less fuel.
Thoughts anyone?
