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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!
  • paisanpaisan Posts: 21,181
    None of the SUVs come in diesel variety, except for the Excursion. :( I only wish you could get the Tahoe in Diesel with the Allison. I'd have one already! :(

  • I own a hd chevy and now going into the shop for the 5th time for a/c compressor not working.this means defroster is not working also.Any one else have this problem.I think I have a true LEMON.
    any suggestions
  • inteinte Posts: 2
    I'm also potentially in the market for a crew-cab GMC 2500 HD with the Duramax/Allison - kids are getting bigger & I'll probably put my '98 Dakota extra cab on ebay or something - great truck, just getting smaller...

    What is the difference, if any, between the Chevy & the GMC?
  • obyoneobyone Posts: 8,054
    the big bass look.
  • Does anyone have info about the 2004's? Have they solved the problems with the injectors? Are there problems with the Allison tranny?
    I'm looking to buy a diesel pickup to pull a 7,000 trailer. Any thoughts about comparison with Chevy, Ford, and Dodge? Thanks for your posts
    Eldon Irving
  • I had a 2500hd 8.1 L gas with the Allison, Had tranny reprogrammed many times due to hard shift problems.. if you would coast down a long downhill stretch and then apply throttle to start back up a hill the tranny would slam into the proper gear, and I mean slam your *ss. I was told that it was normal even though they reprogrammed it anyway. The engine would also crap out on the freeway at 65 to 70 mph.. pull to the side of the road...wait for 30 to 60 minutes and it would start and go 50 to 500 miles before it would do it again.... after 4 0r 5 tows and weeks in the service dept..I gave it one last try before I gave up on it.. It was in the shop for about 2 weeks.. and I was told a mechanic had been driving it home and back for a few days without trouble.. I picked it up and went to the lumber yard and loaded a stack of 2 X 6 decking on my roof rack and wouldn't you know it... 10 minutes later it died and the load shifted off the rack and crushed the hood and shot down the street and almost nailed a Jaguar in front of me. GM refused
    to repair the hood under warranty but did repurchase the truck under the lemon law...My insurance paid to fix the hood.... But My other 2500 HD's with 6.0L have had no problems.. and I have 6 of them 2- 00's no 01's 2 02's 2 03's.
  • I bought a 2004 crew duramax and it runs great. The chevy rides more like a nice car than the other trucks... I have no shift problems - or any problems for that matter. I live in NW Montana so there are no nice roads so quite ride is not an option. The truck is expensive but where I am in truck country they wont deal much cause the next guy will buy it.
  • jrkracejrkrace Posts: 32
    Hi All,Just wondering how everyone with Duramaxes were doing with this cold EAST Coast weather. As I type it is 6 degrees F. outside and snow is on the way. What I am after is the differences between the two engines in terms of snow plowing, heating up in the winter, ease of starting in the winter,etc. I know that the Duramax is more powerful, but the drivability issues are what I am after. Thanks and sorry for the length....Any input would be great.
  • Anyone know whai is the largest(tallest) I can put on a 4x4 2500 hd.
  • It said my duramax was not legal for sale in ca ma me ny vt what kind of trucks do they sell in those states?
This discussion has been closed.