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2004 2500HD 6.0l lifespan

Has 140k what can I expect?

Re: 2004 2500HD 6.0l lifespan

Postby Neal » Apr 10 2014, 6:01am

Talking to our large animal vet tonight about their 13' 2500 6.0 bought back last Sept. already has 50k on it. Said the 08' 2500 6.0 the 13' replaced had 350k no major repairs just the routine stuff. Carries a vet box in the back all the time. Still has the 08' for use on their farm. I have a 06' 2500 6.0 with 159k that is used as a farm truck still running strong.
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Re: 2004 2500HD 6.0l lifespan

Postby 2015Duramax » Mar 02 2015, 4:33am

I have a 2006 WT silverado2500hd 4x4 that plows snow 20plus hours every 2 inch storm about 40hrs if more than 6 inches also carrys a 1.5 yd bulk salter along with towing a trailer daily for work in summer mostly 2 riders but we use to pull rocks and logs also with a 16 ft trailer.... I don't race it I'm easy on the gas pedal atleast after the first yr lol, I use synthetic oil and throw some bg44k in their about every 40k miles it now has 192,000 miles and I wouldn't hesitate to take anywhere in the U.S. From michigan runs good engine always has. Trans was replaced at 170,000 miles that was only because it got hot and I kept going thinking I could make it well I learnes u should stop and let it cool down if that happens, the trans cooler line got plugged and was not allowing the trans fluid to circulate I cooked it, before it overheated I had no issues with it. Other than that I've just replaced front wheel bearing around 100,000 miles alternator and battery around 150k and fuel filter, oil every 3k-5k miles mostly around the 3k mark. Keep the air filter clean I use a k&n since was almost new. Just replaced 1 control arm and both sides upper and lower ball joints at 180,000 miles I figured I'd throw some new shocks on it too since they were original ones still on their.... Overall no complaints with the silverado the 6.0 is a great dependable engine, although I did just buy a 2015 silverado with the duramax engine mainly because of resale value and a little better fuel mileage but dang this duramax has some power also finally bought a diesel because this one doesn't stink like most diesels and is as quite as my gas truck well almost it is amazing I think 400hp stock, but if I could of got the same truck I did in 2006 for the same walk out price of $21,000 I would have they went way up on price
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Re: 2004 2500HD 6.0l lifespan

Postby pawleyk » Mar 13 2015, 6:02pm

I've got 150k+ on my 2005 and it runs like new. Brother has 175k+ on his and we had one for the buisiness with over 300k on it. Both of those are 2004's. Both 2004's have had new transmissions, but are still going strong. The one with over 300k is used as a ranch truck now..

Just take care of them and treat them right. The small-block vortecs are great motors. Bad mileage. Great motors. I believe they will outlast the Duramax's all considered.
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Re: 2004 2500HD 6.0l lifespan

Postby tommy8768 » May 27 2015, 11:40pm

We have put oil pumps in a few at my shop. All had high miles- 150k plus. One had 283k on it and goes like we the f'n people now. thats the only real issue I've seen with higher mileage 6.0s
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Re: 2004 2500HD 6.0l lifespan

Postby wlofton » Jun 03 2015, 11:26pm

Hello all. I have a 2001 chevy 2500 HD 6.0L with 280,000 plus miles and use Rotella 10w-40 oil and it runs great average 12mpg and getting ready to put cold air intake , shorty headers, new exhaust without cats and a custom tune. hope to get near low 20 mpg.
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Re: 2004 2500HD 6.0l lifespan

Postby 95PGTTech » Jun 08 2015, 12:13am

ZRU-1 wrote:im with every one here i have 158k on my 02 with the 6.0 i run good oil ( royal purple i know i know im going to get some hate here) and i just treat her like my baby and ive had it over a year now and i have no real issues ( needs a wheel bearing) to speak of, treat it right and it will do the same


A particularly great customer of mine has 695,xxx miles on his 00 Sierra 1500HD last time I saw it (probably upwards of 720 now). Since about 400 it has had a nasty rear main seal leak that he has not wanted to get fixed (frankly, good decision, the rockers are almost completely rusted through and the hood almost to the point it won't close). We have done brakes, brake lines, fuel lines on it in the last couple years. He adds a 5qt container of generic walmart 20w-50 to it per WEEK it's leaking so bad and a bottle of lucas rear main seal "repair" (in the company's defense, it has not stopped but has significantly slowed the waterfall of oil). I can remember changing the filter maybe once in the last couple years, and I remember getting covered so badly it felt like the engine was running. It is his work truck and he is literally attempting to drive it into the ground (a 2015 sits in his driveway, still with 600 miles on it since purchase almost 6 months ago). He can't kill damn "Betsy."

Point is, it's all a roll of the dice. This guy does everything not by the book and after the fact (calls me to inspect brakes only when he is metal to metal sound). Some people spend $100+ per oil change on fancy internet **** oil and filters and follow the maintenance schedule religiously and they blow up at 150k. My advice: do good maintenance, don't empty your pocket on fancy oil/filters but change it often, and pray
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Re: 2004 2500HD 6.0l lifespan

Postby Sierrafan » Jun 11 2015, 10:35pm

Reading the posts here, am I to assume the 6.0 engines are pretty much junk? The reason I ask that is, I'm looking at a 2004 GMC 2500hd crew cab 4x4 with 173,000 one owner miles. From what I've read, you have to replace the oil pump at around 175,000 miles average. Compared with other posts in this forum, it seems everyone is getting 300,000 out of their 5.3's and not having that problem.
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Re: 2004 2500HD 6.0l lifespan

Postby 19trax95 » Jun 11 2015, 10:40pm

How the heck did you come to that conclusion?

The 6.0 is one of the tougher and long lasting motors out there. Gm designed it for abuse really. Abuse and a long life.
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Re: 2004 2500HD 6.0l lifespan

Postby GTX63 » Jun 11 2015, 10:46pm

Uh, no, the 6.0 engines are not junk. You read a post, meaning one, that mentioned replacing the pump. For every negative posted about the engine, there are dozens, if not hundreds of satisfied owners, including myself. As far as the 5.3, I've owned and maintained and built Chevy motors for over 35 years, so I know a little bit. The 5.3 is a good and durable engine. They are also prone to using oil, especially the flex fuel units. The 6.0's biggest drawback is fuel consumption, and that is mostly mentioned by those who use the 2500 series truck for pleasure rather than towing/work. You might want to hit the 6.0 section of this forum and read the threads there for a little more in depth background and opinion.
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Re: 2004 2500HD 6.0l lifespan

Postby Stormus » Aug 31 2015, 12:01am

I am sitting on a nice 420k. Just slapped in a new oil pump as pressure was a concern. Same ol' 4l80e and 4.10. Scary to thing how much fuel it has taken to get to this point.
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