ATS diesel performance Epower tuner. 

2001-2004.5 LB7: +350 HP / +530 lb FT, Ten Power Levels, Speedo correction, Speed limiter removal, +2-3 mpg, DTC code reading, Gear Ratio Adjustment and Defueled Shift Option

Power Levels (LB7):

1. +50hp - +97 lb.ft. 

2. +90hp - +160 lb.ft.

3. +120hp - +200 lb.ft.

4. +160hp - +265 lb.ft.

5. +221hp - +332 lb.ft.

6. +270hp - + 349 lb.ft

7. + 300hp - +362 lb.ft.

8. +315hp - +383lb.ft.

9. +330hp - +503lb.ft

10. +350hp - +530lb.ft

2004.5-2005 LLY: +315 HP / +383 lb FT, Eight power levels, Speedo correction, Speed limiter removal, +2-3 mpg, DTC code reading, Gear Ratio Adjustment and Defueled Shift Option

Power Levels (LLY):

1. +50hp - +97 lb.ft. 

2. +90hp - +160 lb.ft.

3. +120hp - +200 lb.ft.

4. +180hp - +265 lb.ft.

5. +221hp - +332 lb.ft.

6. +270hp - + 349 lb.ft

7. + 300hp - +362 lb.ft.

8. +315hp - +383lb.ft

2006-2007 LBZ: +270 HP / +349 lb FT, Six power levels, Speedo correction, Speed limiter removal, +2-3 mpg, DTC code reading, Gear Ratio Adjustment and Defueled Shift Option

Power Levels (LBZ):

1. +50hp - +97 lb.ft. 

2. +90hp - +160 lb.ft.

3. +120hp - +200 lb.ft.

4. +180hp - +265 lb.ft.

5. +221hp - +332 lb.ft.

6. +270hp - + 349 lb.ft