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Silverado / Sierra 2500HD Duramax ... any thoughts?



  • lhagen2lhagen2 Posts: 1
    I have a 2003 Duramax with less than 8,000 miles. Last Friday while leaving on vacation the engine started hammering and blowing black smoke. Had it towed to the nearest dealer, as of today they still haven't given me an aboslute answer. I am sure it is a stuck injector. Has anyone else besides yamahauler had this problem?
    And what kind of long term damage is it going to cause.
    The last diesel I had was a chev 6.2 and I swore I would never own another and now my brand new $40K truck is in the shop & my vacation is OVER!!
  • secondurasecondura Posts: 1
  • pavery99pavery99 Posts: 10
    Have 15k miles on my '03 Duramax 2500HD with no engine/tramsmission problems. I think it took the first 12k to break in - now it's awsome for towing 7000lb 5th wheel trailer - maintains 75mph up most grades - consistent 14 mpg. Previous truck ('01 Sierra 2500 Vortec 6.0L) struggled with the same trailer, had drive line clunk/slip and weird transmission noises at 42k.
  • I have 6 months and 17,000 miles on my 2003 Silverado D/A 2500HD LT 2WD. Pulling generally about 9,000 pounds. Mileage is now around 14MPG under load, and 22MPG empty, up from 12/20 when the rig was new.

  • Is there any concerns about the Chevy Duramax having aluminum heads??
  • I have recently acquired a 2003 2500HD CC w/8ft bed (which was hard to find by the way) I love this truck. I had a 2000 6.0 and was thinking of becoming a Ford guy after that one. Everyone I know in my area who tows like I do said they loved 'em so I tried GMC again. I tow 7000-8000 all the time and it goes great and I have never seen less than 15.9 MPG where as the 6.0 did about 9-10 and a quart of oil every 1500 miles. The D/A combo is by far the best truck I have driven. I have a few gripes about squeaking interior but .... thats another post.
  • There is something very annoying happening to my truck. The inside is starting to make all kinds of crackling noise, and the doors squeak. First the doors on the passenger side squeak when going over bumps .... yes they are shut and come together fine (CC doors, 1 big one small). I have greased the hinges and latches but still noisy. The other thing is that the front pillars next to the windshield both "crackle" when traveling over 60mph, I don't know how to describe the sound better than that but I was wondering if anyone else had these problems and what they did about them. I am about due for the 7500 mile service and wanted to to be armed with info when I go in.... Thanks for any feedback.
  • jaijayjaijay Posts: 162
    I bet you have a bug deflector on your truck and is the culprit with the windshield noise. If this is the case, you may want to scan the forums as there is a fix for this.
  • Your dealer or GM are outright lying to you. The power is no different then the 2001 or 2002. I own a 2001 and happen to know the production history of Duramax firsthand. This has been a reoccuring problem with the 2003. Have dealer check ignition and throttle systems. If the dealer doesn't believe you then tell him go with you and tow your trailer with two different 2003's. Bet he won't agree to this.
  • I've replaced three fuel injectors, 2 at 40,000 miles and 1 at 60,000 and just this past weekend (80,000 miles)the problem happened again. The truck lost power and the service engine soon light came on. Now I have to take it back in and get hassled over whether or not it's covered under warranty. Any emission related problems are covered up to 100,000 miles but the dealerships do seem to like that part of the warranty. Has your problems been solved? and If so what did they do to fix the problem so I can give the dealership a heads up on it.... Thanks for any feed back.
  • I am considering a 2500HD Diesel, and I have been reading a lot on bulletin boards about two problems. One (the more serious) is a vibration problem. The other is that you must install a bed reinforcement kit if you want to put a tool box or ladder rack in it. I think most of these related to 2001, and 2002 models. Does anyone know if these problems still exist on the 03 and 04 models?
  • I am considering purchasing a DURAMAX equipped HD2500 4x4 ext cab PU. (I currently have a similar truck w/the 6.0L gas engine). My dealer has imformed me that GMC (and I assume GM) has cut back production of DURAMAX equiped vehicles to 5% of units sold (I didn't think to ask what it was before). Anyone out there have any idea why GM is doing this? I do know this: these units are very hard to find here in northern N.E.! Thanks for any info.
  • I live within the triangle made by drawing a line from Houston to San Antonio to Dallas/Ft Worth. Bunch of mega dealerships in this area. I wanted a light colored 6speed equipped DMax ext cab short box 4X4. The dealer that I used finally found one at a small dealership in NE TX. Very pleased with it through 23K miles. It handles big loads with ease and gets excellent mileage. I'll never own another gas powered rig.
  • Our fleet of 2500HD and 3500HD Dmax's have now passed the 200,000 mile mark without any significant mechanical problems. We use Royal Purple synthetic lubricants and have added additional fuel filter/separators. Routine service and clean fuels make a big difference. The coolant used by GM gave us some concerns and our consultant told us to stick with it and change at the required intervals. No cooling system problems either.
  • I am looking at buying a Duramax 2500 for work and my every day drive. I haul paper and other packaging materials 3 months of the year while the rest of the year I will drive it like a car on sales calls. I am thinking of selling my 2003 G35 and buying the 2500. Should I wait until the new engine's come out next month? Are the problems with the injectors that big of deal since they fixed most of the problems in 2001? Also the ride is a little rougher than some of the other trucks I have looked at. Does anyone have any experience with putting Edelbrach shocks on the back to soften the ride some? I want the best of both worlds and I think the 2500HD Duramax is the best buy for both re-sale and performance but I want to be sure???? any thoughts?
  • paisanpaisan Posts: 21,181
    What kind of milage do you guys get?

    My situation will be: City driving, and when not city driving towing 5000lb trailer @ 75-80mph on the interstate. Thanks for the input.

  • Does anyone have a new 2004 Dmax/Allison. I'm in the market to buy and want to know if GM has gotten their problems solved in their new trucks.
    Thanks for any info you can provide.
  • jaijayjaijay Posts: 162
    bluegrass1, what problems?
  • Well, I've talked to several owners who have had all kinds of Allison tranny problems, mostly vibrations and intermittant problems. Also a few injector problems on the Dmax engine. I was very surprised about the tranny problems since the Allison is so highly thought of.
  • I own a 2002, Dmax, 2500, the Allison is great in the mountains, hardly have to use the brakes when going down steep grades. It is so impressive the wife wants to buy a Tahoe, but only if she can get the Allison in it. Does anyone know if this is possible, or course the local salesman says no. I think he wants to sell me something from the lot, da!
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