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You can get the HOT tunes for $50 for a limited time. Probably worth it. I think you also get some added features in addition to the HOT tunes, but I am not 100% sure about that.

Kennedy Diesel custom Tow/Performance tune (70 hp).

The KD ecm is pricey! IMHO, it is worth it to someone who puts a lot of miles on a truck. I put 40-50k a year on mine. With today's fuel prices and the improvement I am seeing in fuel economy, it is going to take about a year for it to pay or itself. I plan on keeping my truck til it has...

Yeah, I was real suprised with the resuts of the egr block and the exhaust. My egt's are considerably lower though, and I don't have all that soot geting back into my intake so it was worth it to me.

I did get a little better mileage on the 85 hp tune, but I didn't put enough miles on it to include it in the comparison.

I have used several different tuners on my '07 LBZ and I put together a summary of my fuel economy results. I have kept detailed records of my economy fron day one and all of the mileage is GPS verified and with 265-75-16's on the truck. I have run the Diablosport Predator, Edge Evolution...

What he said!

Ray, My pre-KD numbers were as follows: Hiway: 18.55 Daily: 17.07 KD numbers: Hiway: 20.11 Daily: 18.61 Improvement: Hiway: 1.56 Daily: 1.54 It looks like I gained a solid 1.5 mpg with the KD tune. The pre-KD numbers include stock, Predator 65 hp, EVO-1, and...

The Duramileage tune did give me some decent gains, but nowhere near the claims. I got low-mid 19's on the hiway and low 18's driving on country roads. I didn't have gauges at the time I tried it and I was a little nervous about the EGT's. They may have been fine but I was too chicken to...

CtChevy427 invited me over to join this conversation so I will try to help. I noticed that t2ch has already responded but I will give you my take as well. I have gotten as high as 20.8 mpg on the interstate @ 72 mph, but I usually average right around 20. Most of my driving is on country...