early 6.0 Chevy engines

yoder519

Well-Known Member
Joined
Feb 1, 2010
Location
Abingdon, VA
Im in the market for a 01-02 reg cab 6.0. Ive heard a few people say the early 6.0s had a lot of piston slap. Anybody on here have that problem out of your early 6.0?
 
Piston slap affected more than just the 6.0. Some have it, some don't. It is more of an annoyance than a longevity issue. My 2001 6.0 had no signs of it at 135k when I sold it, my mother's 2002 5.3 Tahoe does, her 2002 5.3 Avalanche does not, my brother's 2003 6.0 with 300k miles did, so did his 2001 6.0 with about 80k when he sold it. Just listen to it, if it sounds bad enough that it will bother you, avoid it. Listen to it both cold and warmed up.

The only real 6.0s to avoid, and this is more for an engine swap aspect than in the truck is the 99-00 6.0s because they were iron head, and had a 0.400" longer crank, which won't mate up to the other later model GM transmissions, although it is just fine with the 4l80e, NV4500, and older transmissions like the TH350, TH400, 700R4, etc. (The 01+ 6.0s used a 0.400" spacer to mate to the 4l80e and a 0.400" thicker flywheel for the NV4500)
 
I've got a 2000 model with the 6.0 and 250k miles, and it has no piston slap cold or warm.
 
ok thanks fro the replies guys. I had a 2003 6.0 with the NV4500 and it did not have it either. I have just heard a couple say they "have heard" that about the 6.0s. But, we all know how that goes. Thansk for the info GCn. Matt, how is your 6.0 holding up? Ive seen a bunch on autotrader with 180k-300k go for less than $5500, although i wouldnt want one with more than 200k miles on it when I bought it. I know it mainly depends on how it has been treated. Our company trucks at work are 2wd 6.0s, none has less than 200k mi, one has 394k mi, they have had to put a rear end and a transmission in it about 50k miles ago. And we all know how company trucks are treated. Still though, if I get a truck and the trans and rear end hold up for 350k mi, I wouldn't complain.
 
I have a 2001 with 140,000 it has slap only when cold. After a 2 to 3 min warm up it is fine. I had a keyless start put on it and just fire it up

before I head out. Pulls my Jeep good though.
 
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