04 gmc sierra 6.6 duramax power numbers?

Hello all,

how much power would the 04 duramax with a 5spd have? is it recommended that i should use any power adders?

thank you in advance for your help,
Don Cannon

Don,

The early 2004 models were equipped with a 300 hp LB7. The late 2004 models were equipped with a 310 hp LLY. If you're not sure whether you have an LB7 or LLY, look at the eighth digit in the VIN. The LB7 was a #1 and the LLY was a #2.

There's a wide range of options for power adders, from plug-in modules to handheld programmers to ECM programs. Check the Product Reviews page for some ideas. :)

Jim

thanks Jim

we went to see it and we both (wife and I) thought that the truck had too many miles although it had the 300hp engine.
thanks again,
Don

I have had a LB7, LLY with edge stuff on it , now I have a LBZ with a custom live EFI tune by Kennedy diesel. The EFI tune is much nicer to drive then the edge stuff , it pulls harder down low , improved fuel economy empty and towing . I would say this is the best option I have used to date. Dont put more then 70 hp more then stock threw a stock trans and it will live a long time , it you tow heavy you may want to back the power down to 40~50 hp added . Live EFI has the ability to do a few differnt programs in one ECM and change the tune on the fly with a in cab switch .