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View Full Version : How many miles can you expect out of a Duramax?


BadRancher
02-27-2010, 10:55 PM
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.

TXNSLighting
02-27-2010, 11:22 PM
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.

ProScape Canada
02-28-2010, 12:48 AM
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.

lawn king
02-28-2010, 09:09 AM
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!

fool32696
02-28-2010, 01:32 PM
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.

rcslawncare
02-28-2010, 04:23 PM
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?

BadRancher
02-28-2010, 05:30 PM
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.

tnmtn
02-28-2010, 05:40 PM
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.

rcslawncare
02-28-2010, 05:45 PM
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?

360ci
02-28-2010, 05:52 PM
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.

BadRancher
02-28-2010, 05:53 PM
Its like a shake and/or vibration.

I aprreciate everyones input. I do lawncare and I have a baby on the way so I need somethin that dependable for work foremost, dependable for my baby to ride in. I don't wanna be broke down on the side of the road in August with no A/C and a 2 month old in the back.

The dealer bought this from a business that sold trailers and golf carts. The business went out of business, so He picked it up from them.

BadRancher
02-28-2010, 05:55 PM
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.

Ha thats awesome. You don't here stories like that everyday. What is TBO?

GravelyNut
02-28-2010, 08:21 PM
Ha thats awesome. You don't here stories like that everyday. What is TBO?

Time Between Overhaul

Another rating is BIF, Before Internal Failure.

rcslawncare
02-28-2010, 08:54 PM
For that price, I would look for a little lower miles.

BadRancher
02-28-2010, 09:21 PM
So you guys think $11,000 is too high.

fool32696
02-28-2010, 10:08 PM
You can get a much cheaper gasser with low miles that will be cheaper to maintain. There's no way I'd spend $11k on a truck with that many miles. Screw a dealer, check ebay/craigslist.

zz4guy
03-01-2010, 02:53 PM
Untested sight unseen he probably paid $5000 for it. I'd offer him $9k cash take it or leave it. You need wiggle room if the engine torpedos on you.

PROPERTYLAWNSERVICELLC
03-02-2010, 08:12 AM
No way would I ever buy a truck unless it was a class 8 truck with 200,000 miles .
btw how do you know its only got 200,000 on the truck that might have been a year and half of hot shot trucking before they unplugged the odo just a thought .