BI would recommend this to anybody looking on improving there HP and toully Dog 40420
 

I own a 2006 Chevy Express 3500 Van. It has a 6.6 CID Duramax Diesel coupled to a 4L85E transmission. Yesterday I installed a Bully Dog 40420 Diesel Tuner in my truck! All I can say is OMG! What a difference that bad boy did on my performance! Keeping in mind I use the van for my Electrical Contracting Business and is loaded with tools and equipment, I did the 1/4 mile test with it. The results were amazing. 15.2 seconds on the 1/4 mile with a speed of 92 MPH. Holy Moly. Still have to tweak it a bit but the difference was night and day! I think i'm going to enjoy having this bad boy in my truck! Any body looking to raising the bar should have a look at this product. I'm very happy! :jump::jump::jump:

sounds like fun

you might want to look into a beefed up transmission to accompany your Bully Dog tuner. from my understanding is that the Duramax in the vans is detuned to the rating of the transmission. once you put a tuner on it is automatically passed the limit of the transmission and it wont live much longer.

stay out of overdrive when pushing the go pedal if you want any kind of life out of it

Play healthy my friend

Thanks for the reply! I will defiantly keep it in 3rd gear! Cant really afford a allison transmission quite yet! :jump:

Give it some more air...:scare2: