I have a 2006 GMC Sierra 2500 Hd crew cab with the 6.6 Liter Duramax Diesel and Alison Transmission. I just took delivery of it so it has around 400 miles on it. I was looking for a little more horsepower in the engine and faster shifting in the transmission. I have been told to wait for the new Superchips Programmer to come out but I have'nt seen that one talked about much on this forum. Any thoughts on this Thanks

I was looking for a little more horsepower in the engine and faster shifting in the transmission.

I've been using the Bully Dog Power-Pup (Model 43568). It gives a "Pretty Good" boost to H.P. in the Tow/Econ mode. A "Hefty" boost in "Competition" mode. (I haven't tried the "Extreme" mode) Both "Seem" to enhance the transmission "Smoothness". (At least it feels like it to me)

I have no experience with the "Other" programmers, etc.

The Power-Pup is (relatively) cheap, and works well (for me) :exactly:

AND... :welcome2: :welcome: to the forum

kimosabe,

When you say "enhances the smoothness shifting" do you mean that in a good way or maybe in fact the trans could possibly be slipping?

Thanks for the imput, new to the DP.

When you say "enhances the smoothness shifting" do you mean that in a good way or maybe in fact the trans could possibly be slipping?

It "Seems" to shift smoother (in a good way)... Not "Mushy", more like "Definite" from gear to gear, like someone who knows how to shift with a "Stick"... It just feels better to me... I get a "Chirp" from the tires going from 2nd. to 3rd, with my foot "In It"... I don't know how else to explain it...

I like it. :exactly:

I'm running the Superchips on my 05 and love it. Have not tried any of the others so I can not speak of them. I would recommend the Superchips.