Chevy 6.0

[rustyplow]

2007 2500 HD 6.0 128000 miles. Good motor or not? Never had a chevy but I'm going to look at this one in the morning.

 

[psimmer]

I have driven two delivering auto parts for a GM Dealer. First was a 2004 one ton cube van. Head gasket went at 460,000 miles. I don't know the history on this one, as I started driving it in 2011. Currently drive a 2013 one ton cube van that when I parked it today had 379,600 miles on it. Both with the 6.0 gas in them. The 2013 is on its 4th transmission, and 3rd rear end, but the engines are fine. Run just about 10 miles per gallon year around, and don't haul much for weight, but do push wind with that tall box. All are driven by retirees who work part time.

 

[SVcummins]

Not bad trucks get about 8 mpg running at 8500 pounds 3/4 ton truck full of tools and air compressor and 6 pulling trailers pretty decent power

 

[scotty-mn]

I have a 2004 2500hd 200000 miles been rock solid . It gets 13-15 mpg as long as you dont drive over 65

 

[rustyplow]

Thanks for the response. Must of been a good truck. Was sold already when I got there. Was listed just yesterday.

 

[Nordic]

I have found the 6.0 L to be excellent for towing, I find it hard to know how they put out all that power... after all not that much bigger than a 350 but seems to have double the power when you hit the hills. My current truck is a 2500 HD which has 4.10 gears and that seems to be the ticket for success for the 6.0 L to tow. My previous one was 3.73, still impressive but not quite the same on steep hills as the 4.10. The 6.0 L has a good reputation by the machine shops I've heard of.

 

[kossuth]

(quoted from post at 20:46:23 12/17/19) I have found the 6.0 L to be excellent for towing, I find it hard to know how they put out all that power... after all not that much bigger than a 350 but seems to have double the power when you hit the hills. My current truck is a 2500 HD which has 4.10 gears and that seems to be the ticket for success for the 6.0 L to tow. My previous one was 3.73, still impressive but not quite the same on steep hills as the 4.10. The 6.0 L has a good reputation by the machine shops I've heard of.

sn t it amazing what computer controlled fuel injection and timing can do? Also factor in 50+ years of R+D over the old SBC and it s no mystery really.

 

[glennster]

i have an 18 2500 hd4wd. amazing power from the 6.0 i still have a gmc suburban, 1990 rv chassis, 454 w 410 gears and hd tow package. the 6.0 walks all over the old big block.

 

[Nordic]

I appreciate your comparison of the 6.0L to the 454 because I have been curious. I have a one ton with a 454 but have never towed with it. I always did wonder if the 454 could pull like the 6.0L.

 

[danofarming]

I have two 6.0. They are a good engine.

 

[johndeeregreg]

dad has a 2005 2500hd with the 6.0. think he has around 136000 miles on it, its been reliable, think he had to have manifold gaskets replaced a couple years ago and maybe a sensor here or there. 10-11 is about tops for mileage empty, down to around 6 when its on the trailer.

if i were looking for a truck i would be looking for one with the 8.1. they have the 6 speed Allison and came standard with the 4.10 posi rear end. and they get better mileage than the 6.0 does, anyone i talk to with one says they will get 13-15 relatively easy when empty.

dad just said today if he had it to do over he would have bought it with the 8.1 instead of the 6.0.

 

[rustyfarmall]

(quoted from post at 21:50:50 02/24/20) dad has a 2005 2500hd with the 6.0. think he has around 136000 miles on it, its been reliable, think he had to have manifold gaskets replaced a couple years ago and maybe a sensor here or there. 10-11 is about tops for mileage empty, down to around 6 when its on the trailer.

if i were looking for a truck i would be looking for one with the 8.1. they have the 6 speed Allison and came standard with the 4.10 posi rear end. and they get better mileage than the 6.0 does, anyone i talk to with one says they will get 13-15 relatively easy when empty.

dad just said today if he had it to do over he would have bought it with the 8.1 instead of the 6.0.

I believe the 8.1 was discontinued several years ago. About the same time that the Duramax diesel was introduced.

 

[BarnyardEngineering]

(quoted from post at 06:43:32 02/25/20)

(quoted from post at 21:50:50 02/24/20) dad has a 2005 2500hd with the 6.0. think he has around 136000 miles on it, its been reliable, think he had to have manifold gaskets replaced a couple years ago and maybe a sensor here or there. 10-11 is about tops for mileage empty, down to around 6 when its on the trailer.

if i were looking for a truck i would be looking for one with the 8.1. they have the 6 speed Allison and came standard with the 4.10 posi rear end. and they get better mileage than the 6.0 does, anyone i talk to with one says they will get 13-15 relatively easy when empty.

dad just said today if he had it to do over he would have bought it with the 8.1 instead of the 6.0.

I believe the 8.1 was discontinued several years ago. About the same time that the Duramax diesel was introduced.

The 8.1L was discontinued in pickup trucks in 2007, so the newest truck you can buy with an 8.1L would be 13 years old now. Most of them are pretty well used up at this point.

I have a 2002 with an 8.1L and it's a beast, but its not without its quirks. It boils off about a quart of oil per oil change, even with Mobil 1 synthetic.

 

[Scott 730]

6 speed Allison became available for 2006.
G80 locking rear was never standard equipment.

 

[Tony C.]

I have a 2008 3500 with 6.0 and 4.10. It gets around 13-15 mpg empty; this is about 2 mpg less than the 1999 3500 with 5.7 and 4.10 that it replaced. It's been very reliable so far.

I have a question, I seem to remember reading somewhere that they changed something on the 6.0 HD in the past one or two years; maybe added cylinder deactivation or something else like that. Hope it doesn't affect reliability. Anyone know what the change was, If any?

 

[Tony C.]

(quoted from post at 08:26:12 02/25/20) 6 speed Allison became available for 2006.
G80 locking rear was never standard equipment.

Are you sure the 6-speed behind the 6.0 gas is an Allison? I thought it's a GM TH 6L90.

 

[Scott 730]

I was referring to a post above about the 8.1l engine.

 

[Bob]

I believe the 8.1 was discontinued several years ago. About the same time that the Duramax diesel was introduced.

Actually, the 8.1 and the Duramax were introduced the same year, 2001.

The 8.1 was produced through 2009.

"The Vortec 8100 L18 was a V8 truck engine. It was a redesigned Chevrolet Big-Block engine and was introduced with the 2001 full-size pickup trucks. It is an all-iron engine (block and heads) with two valves per cylinder. It retained the same bore diameter as the old 7.4 L (454 cu in) Big-Blocks, but the stroke was upped by 9.4 mm (0.37 in) to reach 496 cu in (8.1 L), for a total bore and stroke of 4 1/4 in 4.37 in (108 mm 111 mm). Power output ranged from 340 to 550 hp (254 to 410 kW),[citation needed] and torque from 455 to 690 lbft (617 to 936 Nm).

Other important differences between the Vortec 8100 and older Big Blocks include a changed firing order (1-8-7-2-6-5-4-3), a new 18-bolt head bolt pattern, longer connecting rods, different symmetrical intake ports, different oil pan rails and the use of metric threads throughout the engine. The fuel-injection system for the Vortec 8100 is nearly identical to that used on Gen III engines, right down to the fuel and spark tables in the ECU.[30]

Vortec 8100s were built at GM's Tonawanda Engine plant. The last L18 was manufactured in December 2009. "