6 speed transmission questions.

I use manual a lot in my Duramax when towing heavy. It runs cooler when I do the shifting.

In my 2500HD with the 6.0 I have yet to use the manual function when towing heavy. I use tow/haul and plant the right foot to the carpet.

Thank you Texan, T/H on the end of column.

Downtheroad, its much more interesting getting comments here than reading the manual:)

Put it in D, press the tow/haul button and drive.

6 speed..GM automatic - does it have a button on the shift arm or on the column for Tow/Haul?

If so, just use 'D' and Tow/Haul when towing.
Did your Burb come with a manual in the glove box?

I tow TT or Horse Trailer about 6000. TT has Equilizer brand sway bars on it.

Excellent transmission. 99% of the time when towing, select D and T/H mode then let the tranny do the work deciding what and when. It has a built in transmission brake when T/H is selected and mine will hold us(10K trailer) at 60 MPH on a 7% downgrade for over 5 miles. When climbing a grade, if you are not satisfied with the speed, select M and then what ever gear you feel will do the job at a reasonable RPM. this transmission is so much better than the 4 speed it isn't even a close comparison.

Depending on the load, you may want to (M)anually select 4th or 5th for the top gear you will be using. Set the tow/haul mode and you are ready to go. It will downshift going downhill as needed.