Hello everyone, please excuse my lack of knowledge when it comes to theses 3rd gens, because I am a 1st genner but I have been researching them for awhile and haven't yet found the answers to a few questions I had about these trucks.... Later on this year I am looking to buy a new truck.. Either a 1994-1998.5 So that I can get a P7100 pump, or A 2003-2005 body style cummins. I have definitely came to the conclusion that I want to stay away from the vp44... Now when it comes to the 2003 and new trucks what are the differences? I hear that a few came without cats built on and if you get the choice get one of those, and does anyone know of a way to interface a laptop computer with the ECM that runs the cummins engine? i have seen duramax guys tie their laptop to the computer and bring up all their gauges injection pressures ect... I know cummins makes software such as INSITE but I have found no information on it. I really appreciate the help guys, $28,000.00 is a lot of money to spend and I want to make sure that I am making the right choice...

 

Here is a break down of the motors and trannys based on year:

2003 S.O. Federal Emissions: 250HP/460lb.ft. Available with NV4500 or 47RE
2003 S.O. Calif. Emissions: 235HP/460lb.ft. Available with NV4500 or 47RE
2003 H.O. Federal Emissions: 305HP/555lb.ft. Only available with NV5600
2003.5 The 47RE was replaced by the 48RE automatic transmission and available with the H.O.

2004 S.O. Calif. Emissions: 235HP/460lb.ft. Available with NV4500 or 48RE
2004 H.O. Federal Emissions: 305HP/555lb.ft. Available with either NV5600 or 48RE

2004.5 (50 state legal) 325HP/600lb.ft. Available with either the 48RE or NV5600

2005 (50 state legal) 325HP/610lb.ft. Available with either the 48RE or NV5600

2005.5 The NV5600 replaced with the G56 6spd manual gearbox.

Now it is my understanding that in 03 and 04, the SO motors had cats, and the HO motors didn't. In 05, I think they all got them. As far as a laptop, I haven't heard of that for these, but could be wrong. If you are looking for more power from one, look at what others have done and ask how well it worked and then do what you can afford.

 

Yeah I think I am really going to have to look into that one, But thanks for the info, BTW how do I know the difference between the SO and HO will it be listed on the pump on the engine?

 

Listed on the sticker on the side of the valve cover. Tells HP for motor.