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Old 02-27-2010, 10:55 PM
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How many miles can you expect out of a Duramax?

I ran across a nice 05 GMC with a Duramax in it. The truck has 199,000 miles on it. It is a good deal for $12,000. But I need to know how many more miles I can expect out of it.
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Old 02-27-2010, 11:22 PM
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Quote:
Originally Posted by BadRancher View Post
I ran across a nice 05 GMC with a Duramax in it. The truck has 199,000 miles on it. It is a good deal for $12,000. But I need to know how many more miles I can expect out of it.
Depending on how its been maintained, it seems they will hit the 300-350k mark. Maybe even more.
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Old 02-28-2010, 12:48 AM
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I was looking in to the 6600 Duramax engine and they seem to go 300-350 but I've seen some hitting 400-500 and one rolling at over 700. The 700 was on a GMC 5500.
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Old 02-28-2010, 09:09 AM
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There is one over @ dieselplace with 700,000 + miles on it. Original motor & tranny, still running well. There are many members over there with high mileage on oem motors & injectors!
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Old 02-28-2010, 01:32 PM
fool32696 fool32696 is offline
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I wouldn't pay that much for it regardless of options. Mine ran PERFECT when I sold it with over 130k on it. It used a little oil, maybe a quart every oil change which was about 8000-9000 miles.
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Old 02-28-2010, 04:23 PM
rcslawncare rcslawncare is offline
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Id stay in the 140-160k range, there going from 12-16k. If its clean and has records, then go for it! 5th wheel or gooseneck on it?
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Old 02-28-2010, 05:30 PM
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I got a chance to drive it today. The engine and tranny drive like a champ. I had a concern on what the dealer says are the tires. Also the oil pressure sits low when idling warm. I dunno if this is normal on diesels or not. Also I swear the temp guage has got to almost the 210 mark before it settles at the quarter ways mark. I got the guy down to 11000 on price, but I'm still not sure on it yet. As listed on KBB and NADA it is about $6000 less the what the dealer has listed. It looks to of never had a goose neck/fifth wheel in it, so thats a good sign of no real heavy pulling.
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Last edited by BadRancher; 02-28-2010 at 05:39 PM.
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Old 02-28-2010, 05:40 PM
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both duramax's i have had the oil pressure drops when at idle after it's warmed up. comes up fine when accelerating or when running.
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Old 02-28-2010, 05:45 PM
rcslawncare rcslawncare is offline
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Yea, thats what I look for in used trucks with a lot of miles. I see a lot of RV transports around here, what's with the tires? Hum or shake?
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Old 02-28-2010, 05:52 PM
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TBO is rated at 250K for Duramax V engines, but that's nothing these days for a diesel. Keep in mind you can get a Duramax 7.8L I6 in heavier C and T GM trucks that will more or less outlast the frame.

I had a 6.5L V8 GM diesel in a 3500 extended savanan (with insulated box and reefer on roof) that just turned 1million kms, or 600K miles before I traded it in. The drivers door fell off three hours away, and I never would have expected that which is why I decided to sell it. I'll also add that it would smoke heavily when you pushed the throttle down over 50%, even in low rpms. At around 75% throttle it would downshift and black smoke would be everywhere.
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