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What's the difference in 5.9?

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Hey I'm buying a 5.9 soon but it's an 04, I see there's different catagories for 03-04 and 04.5-05? I'm confused what's the difference?
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How would I be able to tell if this truck I might buy is a 2004 or 2004.5?
 

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How would I be able to tell if this truck I might buy is a 2004 or 2004.5?
The easiest way to tell the difference between a 2004.5 and a 2004, is to look on the drivers side of the valve cover, look where it says "Advertised HP" and if it says 325HP its a 2004.5 and if it says 305 then its an early 2004.
 

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04.5 went to the high output version.
False info, the 03 cali was a 235hp edition truck and anything other than that 03-04 that had the 250hp motor was the SO, the 305hp 03-04 was the HO motor in the series, every motor in the 04.5+ series went to 325hp there is no HO motor for the 04.5+ series although they did change the TQ ratings on the 05's+ from 600ft lbs to 610 ft lbs (i believe thats when they changed it), other than that they are all equal. The 2003-2004 Trucks have 2 injection events and the 2004.5+ have 3 injection events. The 2004.5+ is an awesome motor to get power from if you are going to just throw a tuner, exhaust, and CAI on it and be done with it, The 03-04 are not as responsive to tuners as the 04.5+ due to the 3rd injection event in the 04.5+ trucks, when ran with tuners they run hotter than any 03-04 which cause melting issues, also the 03-04 had weak valve seats and common injector probs, but the seats only drop when under High Heat. Which in an 03-04 getting it hot with the proper mods is not easy to do. Also the 03-04 get better mileage due to the fact that they only have 2 injection events rather than 3, such as 04.5+. The 03-04 have a mechanically controlled wastegate, whereas the 04.5+ have an electronic wastegate. Also like I stated before, the 03-04 are not as responsive on tuners as 04.5+, but when the 04.5+ reach 800-900hp they stall, there has not YET been an 04.5+ truck (325) that has reached 1000hp+ on #2 only. The 03-04s can and do, do it.:thumbsup: Anything else just ask


Eric Brown 1138HP #2 only 2004 305/555 :)
 

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False info, the 03 cali was a 235hp edition truck and anything other than that 03-04 that had the 250hp motor was the SO, the 305hp 03-04 was the HO motor in the series, every motor in the 04.5+ series went to 325hp there is no HO motor for the 04.5+ series although they did change the TQ ratings on the 05's+ from 600ft lbs to 610 ft lbs (i believe thats when they changed it), other than that they are all equal. The 2003-2004 Trucks have 2 injection events and the 2004.5+ have 3 injection events. The 2004.5+ is an awesome motor to get power from if you are going to just throw a tuner, exhaust, and CAI on it and be done with it, The 03-04 are not as responsive to tuners as the 04.5+ due to the 3rd injection event in the 04.5+ trucks, when ran with tuners they run hotter than any 03-04 which cause melting issues, also the 03-04 had weak valve seats and common injector probs, but the seats only drop when under High Heat. Which in an 03-04 getting it hot with the proper mods is not easy to do. Also the 03-04 get better mileage due to the fact that they only have 2 injection events rather than 3, such as 04.5+. The 03-04 have a mechanically controlled wastegate, whereas the 04.5+ have an electronic wastegate. Also like I stated before, the 03-04 are not as responsive on tuners as 04.5+, but when the 04.5+ reach 800-900hp they stall, there has not YET been an 04.5+ truck (325) that has reached 1000hp+ on #2 only. The 03-04s can and do, do it.:thumbsup: Anything else just ask


Eric Brown 1138HP 2004 305/555 :)
So it's false info that the 04.5's had more horsepower than the 03-04's? lol

Maybe I shouldn't have called it a high output version, but there is a difference in power ratings.
 

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So it's false info that the 04.5's had more horsepower than the 03-04's?
I did not say that, the 04.5+ do have a higher factory HP and TQ rating, I was stating that the 04.5+ is not the HO for the CR in general it is a different series. In a sense I guess you could say it IS the HO CR, but..since the motor belongs to a diff series of CRs I do not see it that way, forgive me if I confused you
 

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No you didn't confuse me. I understand the difference between the versions. And I've seen Erick's truck firsthand, so I know what a 305 can be built to.

The point being, the OP wants to know what the difference is between an 04 and 04.5. And it's the factory power ratings - in addition to things you listed.
 

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No you didn't confuse me. I understand the difference between the versions. And I've seen Erick's truck firsthand, so I know what a 305 can be built to.

The point being, the OP wants to know what the difference is between an 04 and 04.5. And it's the factory power ratings - in addition to things you listed.
I covered most of them, if he has anything else he can ask, I will do my best to answer.


Never met eric, but I have read alot about the rig, it is nasty, I hope the 6.7 and 5.9 end up dominating the 6.4s and Lmms, I heard there are some 6.7s getting past 800hp, is this true? If so w/o spray they are ahead of the 6.4L, but in Febs edition of DPM there is an LMM GMC that has 1200hp:shock: Pisses me off, I am a Diehard Cummins fan, and hate to see the LMM or any truck surpass it (cummins) :(
 

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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


Now the question is, why is this in the 6.7 section??????
 

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I covered most of them, if he has anything else he can ask, I will do my best to answer.


Never met eric, but I have read alot about the rig, it is nasty, I hope the 6.7 and 5.9 end up dominating the 6.4s and Lmms, I heard there are some 6.7s getting past 800hp, is this true? If so w/o spray they are ahead of the 6.4L, but in Febs edition of DPM there is an LMM GMC that has 1200hp:shock: Pisses me off, I am a Diehard Cummins fan, and hate to see the LMM or any truck surpass it (cummins) :(
Back in 07 Erick and Reb took a Cab and Chassis 6.7 motor to 1080 hp and threw a rod through the block. That's when we discovered the first weak link in the internals - 6.7's need 12V rods when getting over 1000hp.
 

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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


Now the question is, why is this in the 6.7 section??????
Nice, where did you find those??


I didnt even notice this being in the 6.7 sec Oops!:shock:
 

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I made that many years ago and have added to it each yere there is a change. Here is the complete list.

Year Tranny Stock HP
1994 Auto 160
1994 Manual 175
1994 1 Ton 240
1995 Auto 160
1995 Manual 175
1996 Auto 180
1996 Manual 215
1996 California 180
1997 Auto 180
1997 Manual 215
1997 California 180
1998 12V Auto 180
1998 12V Manual 215
1998 12V California 180
1998.5 Auto & Manual 215
1999 Auto 215
1999 Manual 230
2000 Auto 215
2000 Manual 245
2001/2002 Auto 235
2001/2002 Manual 245
89-93 First Gen 12V rotary pump
94-98 Second Gen 12V P-Pump
98.5-02 Second Gen 24V VP44 electronic pump

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.

2007 6.7L Cab and Chassis 305HP/610lb.ft with either the Aisin 6spd Automatic or the G56 6spd manual gearbox

2007.5 (50 state legal) 6.7L 350HP/650lb.ft with new 68RFE automatic and 350HP/610lb.ft with G56
 
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