I am new, but I noticed your inquiry about the 2004 Dodge. Below is some information you may find helpful regarding the features for the 2004 and 2004.5 Dodge Cummins.

Looks like a great truck, but I would see if you can get the VIN number, and ask any Dodge Dealer Parts Department to run a vehicle stat sheet for the truck. This way you will know exactlty which features are on the truck at the time of factory delivery. The report is free, and usually is about 8 pages of detail, including the EPA emission zone the truck was made for regarding the state air quality regulations.

Frankly, I think the truck is over priced. A truck of this year and condition should not be over $30k in mint condition. I own several of these Dodge Cummins, and based on fair market value, the truck is too high. But, it's your call. You have to decide what is best for you, and the value you see in the truck.

Take care, and good luck. Hope this information is helpful.
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2004 and 2004.5 Dodge Cummins

2004 model engine ratings and transmission choices are
different for California, Maine, Massachusetts, New York
and Vermont. These states were given the 235 HP/460
ft-lbs engine only.

At mid-year the 2004.5 engine with 325 HP and 600 ft-lbs
torque is released. With it mid-year introduction this engine
is now the only engine offered (50-state certified).
Five-speed manual transmission is not offered in 2004.5
models with 325/600 engine.

2004.5 model is offered with uprated 48RE automatic transmission.
3500 Quad Cab, short bed now offered.
7/70 powertrain warranty, 7/100,000 Cummins engine
warranty.

Models Available:
2500HD as standard cab, quad cab, short bed, long bed,
4x2 and 4x4.
3500HD same as above. The dual wheel 3500 is not offered
with a short box.

Engine Ratings:
The 2004 engine is 305 HP and 505 ft-lbs and is available
with six-speed manual and 48RE automatic. The states
of CA, ME, MA, NY, VT are only offered the 235 HP/460
ft-lbs engine for the first half of the year.
The 2004.5 engine is 325 HP and 600 ft-lbs torque as
standard with no optional engine. Offered only with sixspeed
manual or 48RE automatic. This 50 state engine
was/is equipped with a catalytic converter.

Transmissions:
Early 2004 models for California, Maine, Massachusetts,New
York and Vermont: five-speed manual, NV4500HD 5th
overdrive.
All other states: six-speed manual, NV5600HD 6th overdrive.
Four-speed automatic 48RE 4th overdrive with revised
torque converter lockup clutch programming.

Differential Ratios Offered:
3.73 and 4.10 to 1

Maximum Tow Ratings:
2500 rugular cab and quad cab, 4x2 and 4x4, 235 HP/460
ft-lbs torque engine in the states of California, Maine,
Massachusetts, New York and Vermont:
▪ five-speed, 3.73 differential – 18,000 GCWR
▪ five-speed, 4.10 differential – 20,000 GCWR
▪ 48RE automatic, 3.73 differential – 17,0000 GCWR
▪ 48RE automatic, 4.10 differential – 19,000 GCWR
All other states with the 305 HP/505 ft-lbs engine or the
2004.5 325 HP/600 ft-lbs engine (all states approved)
were shown to have a 20,000 GCWR regardless of
transmission or axle ratio.

3500 single or dual wheels, regular cab and quad cab, 4x2
and 4x4, 235 HP/460 ft-lbs torque engine in the states of
California, Maine, Massachusetts, New York and Vermont:
▪ five-speed, 3.73 differential – 18,000 GCWR
▪ five-speed, 4.10 differential – 20,000 GCWR
▪ 48RE automatic, 3.73 differential – 17,000 GCWR
▪ 48RE automatic, 4.10 differential – 19,000 GCWR

All other states with the 305 HP/505 ft-lbs engine or the
2004.5 325HP/600 ft-lbs engine (all-states approved),
with either an automatic transmission or six-speed:
▪ 3.73 differential – 21,000 GCWR
▪ 4.10 differential – 23,000 GCWR

Summary: Varies by model and options. Maximum is quad
cab or standard cab 4x2, six-speed manual, 4.10 axle ratio,
4x2 = 23,000 GCWR.

Cab Chassis Models:
Not offered by the factory. Howeve,r commercial owners
could order a “box delete” option.

Comments:
The 2004 model year was an exciting one for Dodge/
Cummins fans. At year end, the bragging rights to the
most powerful diesel engine belonged to Ram owners with
an engine certification of 325 HP/610 ft-lbs torque.