howe719

some one please tell me how the trucks got the name 04.5 why not just year 04 or 05 this is the first time i ever heard of this. just something i never knew and wanted to know. thanks

triplenickle

Any truck with a build date earlier than 01/01/04 will be a 2004. Any truck assembled after that date will be a 2004.5. Any truck prior to 01/01/04 has the HO 305 HP motor All 04.5, 05 have the 325 HP, and a cat, resonator, 3rd injection event..... Look on the inside door sticker to see the assembly date, mine is 09/03

howe719

so do they do that with every year then or just 04 because they started putting the cats on them and the other things

Charlie8301

not every year, but there's a '01.5 also

Randy

BigBlue

Yup. I've got an 01.5.

12valve@heart

and a '98.5 (12v/24v) and a '91.5 (non-intercooled/intercooled). The .5 designation usually indicated a major change in the middle of a model year.

Red3quarter

Isn't there also a 2002.5? After the first of the year didn't they change the front axle to being a non-CAD vs. CAD (2002 and below)?

John Halter

There was a 91 and a 91.5 to , made it a real pain for parts . Some parts were 91 some 92 it was always a hit and miss problem for me . One had a precooler and one didn't , the early one had a little more power with out precooler .

displacedtexan

At some point yes they did switch. Never heard them called 02.5, I thonk they just switched because they ran out of old parts. I don't think there are a lot of non CAD 2 gens.