HOLY SH!T...

gemarsh

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Just got a little box in the mail, took it out to the truck, followed the instructions, plugged it in, and took the 6.6 diesel for a test drive. It's like bolting on dual carbs and a shot of nitrous back in the day. Absolutely no traction. Didn't realize that diesel had that in it.

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Getting ready to order 2 more.

 

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I have found that Sport mode set on 4-5 is just right. It eliminated the dead spot programmed into the ecm, from a dead stop.

I will more than likely use the oem setting, when in tow mode, pulling equipment around. Tow mode doesn't seem to have that lag spot. Or it's programmed out just like 1st gear is programmed into tow mode.
 

I did the Edge programmer and airlift air bags! Like a totally different truck! Especially when pulling my Montana!

22 AT4 2500HD
 

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Just got a little box in the mail, took it out to the truck, followed the instructions, plugged it in, and took the 6.6 diesel for a test drive. It's like bolting dual carbs and a shot of nitrous back in the day. Absolutely no traction. Didn't realize that diesel had that in it.

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Getting ready to order 2 more.

So what parts did you buy? I'm a bit confused...
 

So what parts did you buy? I'm a bit confused...
 

Just got a little box in the mail, took it out to the truck, followed the instructions, plugged it in, and took the 6.6 diesel for a test drive. It's like bolting dual carbs and a shot of nitrous back in the day. Absolutely no traction. Didn't realize that diesel had that in it.

View attachment 31142


View attachment 3189


Getting ready to order 2 more.

I just ordered mine for my 25 HD AT4 after reading this post and reviews it sounds awesome …this is my first diesel so learning still..would a cold air intake from AFM be worth installing ? I did order it haven’t installed yet just jumped the gun without doing research should I just install it and see if it helps? As I understand they come with a cold air intake from GMC..any help much appreciated !
 

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