fast84

Got a mechanic buddy who just pulled a 6.0 out of a 2001 GMC 2500 HD. Had a rod knocking but still running. What #'s to look for on block?

GMCtrk

iTrader: (27)

It's an LQ4. LQ9 wasn't available until 02, and even then it was caddy specific.

1994Vmax

iTrader: (4)

Yup. Or after that in the Silverado SS's, Vortec HO, Denali Pickup ( 05-07) and Vortec Max.

For the difference in the engine I would just get a 2005+ LQ4 which has the LQ9/LS2 rods in it and be done. The difference of 0.6:1 Compression is not worth the dollars.

Block will have a big 6.0 cast on it and it will have 317 aluminum heads.

fast84

Ok. Thanks guys.

iregret

iTrader: (4)

That 2001 LQ4 also has iron heads.

zero2sixT

iTrader: (4)

I think 99-00 had the iron heads. '01 should be the 317s

iregret

iTrader: (4)

Oh, my mistake. I thought it went to 01'. Weren't the iron heads identical to the 317's but weighed like 40 pounds more?