How do i know if my 04 Chevy duramx diesel has an allison transmission?

Question

I bought a used chevy 2500 hd diesel turbo duramax, but not sure the trany is allison?

Answer 1

All models of the 2500HD chevy trucks with the 6.6 liter duramax came stock with the Allison 1000 5 speed automatic trans from 2001 through 2005.Starting in 2006 models the Allison transmission became a 6 speed trans.Best of luck.

Answer 2

IF YOUR NOT SURE TAKE IT TO THE CHEV. DEALER AND LET THEM PUT IT ON THE RACK,THEN YOU'LL KNOW.

Answer 3

take your vin number to your local Chevrolet dealership and they can give you all the information including that

Answer 4

If it's an automatic then it's definitely an Allison. Does GM even offer a Manual transmission behind the Duramax?

Answer 5

2001-2004 Diesel Chevy 2500  Trucks are Allison transmissions.

Answer 6

a true technican would say look at your opion label they not lie

Answer 7

If it is a duramax it comes with the Allison.  The only cheesy part is if you want to hook up a PTO you will need to do some major work on the allison to put in the necessary gear to do a PTO drive..