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Chevy Silverado and GMC Sierra Duramax Diesel Questions

KCRamKCRam Mt. Arlington NJPosts: 3,516
Talk about problems with your Duramax - as well as the older 6.2 and 6.5 diesels - here!


  • rockyleerockylee Wyoming, MichiganPosts: 13,993
    I didn't know any problems with the Duramax existed :surprise: The original LB7's test mule of 1,000,000 miles and GM, said good enough for us and they shut the Duramax truck's engine off. They then took it back to the lab and the engine showed only minimal wear and one guy said she'd probably do another million. :D "So, the story goes" ;)

  • I took my 2006 Sierra 2500HD in today for an oil change and to have them check out a "ticking noise" coming from the engine bay. The dealer service gave me a technical bulletin #02-06-01-022E dated 1/12/06. The gist of it is they all do that,some worse than others. Supposedly the condition doesn't effect durability or reliability. We'll see....
    Anyone else have this ticking?I love this truck and hope to have a long relationship with it. You know what I mean! :blush:
  • Have 02 Duramax. In 04 with 112,000 had injector failure, all 8 replace under extended warranty. Now at 220,000, have had 4 fail, dealer says that for 4 injectors and a fuel filter - cost $2700!!! Some people say that GM will warranty the injectors, dealer says "no way". Seems excessive to me and just not right. Any help or proof if GM did honor a second set?
  • I have a ticking noise in my new 2007 duramax. Bought it in September and has 4200 on it now. I took it to the dealer they didn't know anything the Rep came by didn't know anything. They took the cross arm off to pull the lower oil pan off, then removed the transmission and fly wheel to get to the upper oil pan and adjusted the oilers. Spent a total of 14 days in and out of shop longest lasting 10 days. I got a call today saying the same thing. If your statement is true why did they tear the lower end of my motor apart. Looks like used vehicle now from underniegth.
  • Apparently your dealer didn't know about or care to find the tech bulletin. They probably figuered they could get some warrenty money out of it. If I were in your place I'd go to a different dealer in the future.
  • 02 duramax only starts on startin fluid but then runs fine myideas is camsensor ,cranksensor,glowplugcontrolmodule,1stinjectorfailurinrail any 1 else hav idea please
  • My 03 silverado has had injector failure 4 times. Starting at 106000 miles. You will most likely have multiple failures. You will need to replace all 8 injectors.Cost is about 3900.00 per failure. Call Justin at GM 1-866-790-5700 ext. 21605. TELL HIM SHERRY WEBSTER REFERED YOU TO HIM.i HAVE FOUND 46 OTHER TRUCKS LIKE OURS WITH INJECTOR FAILURE. LET ME KNOW WHAT HE TELLS YOU. JYSYWEB@AOL.COM. GOOD LUCK.
  • evergreenevergreen Posts: 213
    Several months ago I was riding with a friend in his Chev Duramax truck. I think it is several years old and he mentioned the only problem he has had was with the injectors which needed to be replaced. Even though the truck was out of warranty, GM did the work at no expense to my friend. I live in Oregon and apparently the problem for my friend was traveling a lot in California. The GM mechanic told him the problem had to do with the gasoline additives used in California. I guess the injectors where replaced by a type that can deal with the additives. Just passing this on, for what it's worth.
  • redrigredrig Posts: 2
    Intermittent failure to start - engine turns over, ignites, dies, then won't restart. Replaced fuel system heater, seemed to fix problem, then happened again, for 3 time. Service shop placed on computer - no errors shown & after towed to shop, started without further repair & continues to start.

    Each failure happened when truck was parked in same spot - slightly downhill with wheels turned to right. Also, temperature had dropped significantly overnight.

    Would appreciate any insight available since repair service can't do much until problem recurrs.
  • redrigredrig Posts: 2
    Learned from previous owner that 2001 Duramax had failed to start a few times, particularly when weather had turned colder. He primed the system manually, sometimes more than once, to get it started.

    Injectors were replaced when the problem with the 2001 system was first discovered. Heater block hadn't been used until I got the vehicle but this doesn't have any effect on the problem.

    Any ideas as to why this could be happening?

    Now it seems to be happening more often
  • my 2002 duramax only starts on "spray" as well. Just went to the dealer this morning (for the 2nd visit with this particular problem), and they are ordering 8 injectors for me, should be here in a week they say. I'll let you know if it fixes the problem. The 1st time I had this problem, I changed the fuel filter, and the problem was gone completely, until I did 500 miles this past weekend (good highway run, box full of firewood, up to 90 mph, but other than that a run-of-the-mill road trip). I have had the crank sensor done last year, as well as a new injector pump (all under warranty, both times involving a 5+ hour tow). One other problem I have had is (in the rain only) the engine gets very loud, tons of black smoke with the pedal down, but clears up if I stop, turn off motor, then resatart. I have never had answers on this one, from either the dealer or BD Power (I run their EZAmp tuner).
  • Well, 2 weeks later, the new injectors came in, and 2 days later (without my truck), I got it back, and it runs like it did the day I drove it off the lot! Just did another 500 miles this past weekend, and it starts right away, every time. I guess the old injectors had been on their way out for a while now. I did see the (warranty) bill, and the total was almost $6000 with taxes, wouldn't want to be on the hook for that one. I'm happy for now... :shades:
  • eugy44eugy44 Posts: 1
    I have a 05 Duramax with 30K miles on it. It has always put out a black cloud under moderate to heavy acceleration. The little contry dealership where I bought it, tells me to use a fuel additive, and that will fix the problem. I am not a diesel expert, but this doesn`t seem right. I know other people with a Duramax and theirs doesn`t smoke.
    Any clarification?
  • goodcrdgoodcrd Posts: 253
    Simple things first. Check air filter and engine oil first. If the air filter is dirty change it. Have your engine oil tested. If the fuel dilution is too high you have an injector problem which needs to be addressed. A good engine oil sample report will give you more information then you need to find an area to look. Also pull your turbo boost sensor and make sure it is clean. This will improve engine performance.
  • akmarshakmarsh Posts: 5
    My 2002 Sierra 3500 with a Duramax diesel engine normally is parked in a heated garage and has 36K miles and has been trouble free until now. I live in Alaska and recently parked outside and the temperature was around 10F and the truck wouldn't start in the morning. After manually priming the fuel filter the truck started and was running fine after that. Yesterday I brought the truck into the GMC certified service shop and had the diesel fuel filter replaced as a precaution. The service tech said some water was noticed which may have been the original problem. I parked the truck in my heated garage overnight and it wouldn't start until I primed it. Has anyone else had this problem? What was the solution?
  • agitatoragitator Posts: 1
    While traveling in my 02 3500, I had a sudden increase in fuel consumption. I stopped to check and notice fuel all over the back of my dually. A steady drip from the oil pan indicated I might have a hose problem or something. Upon going to a dealer on the road. I was told my injectors were stuck open. My oil pan is full of diesel and they wanted $5000 to fix. My truck is running smooth and is without smoke. Can anyone tell me what is going on?
  • The injectors on the 2002 (and other years) Duramax has an extended 320,000km (200,000 mile) warranty, which is well beyond the regular Duramax warranty. This is as a result of all the injector problems GM has had with this motor. Unless you have more than 200,000 miles, your injectors (& related labor) should be covered.
  • uglyduckuglyduck Posts: 1
    just bought a new 2006 express van with a duramax deisel. When it had just over 1500 miles on it it started smoking periodically. It started with a small loaded trailer hooked up at around 70 mph. Now it seems that it will smoke at any time. Big clouds of white smoke. Or heavy black smoke. Its at the dealer now for the 2nd time and they can't figure out whats wrong. Any Ideas will be helpful. I know this shouldn't happen because I had an 03 silverado with same engine and that didn't smoke at all.
  • jklingel8jklingel8 Posts: 10
    I am about to receive a 2007 3500 Sierra w/ a 6.5(?) liter turbo diesel. I have heard of a problem that "all three" companies are having with idling the diesels in cold weather (-20 and below). Apparently the DPFs are plugging up, shutting down the engine. Have any of you heard about this? (A Dodge salesman told me the Dodge "solution" is to drill holes in the filter and let the particles fall out. They plan to do that until the issue gets resolved at the factory.) Any experience w/ this? Thanks. john
  • I have a 2007 (new body style) 2500hd duramax 6.5 coming and I heard from my mechanic of a similar issue as you are desribing, only it's not only in cold weather. The truck randomly shuts down apparently. When I ask the dealer, and when I called GM they say they've never heard any such thing. Does anyone know anything about this??
  • I have a 2007 (new body style) 2500hd duramax 6.5 coming and I heard from my mechanic of a similar issue as you are describing, only it's not only in cold weather. The truck randomly shuts down apparently and there is currently no fix so it would have to be returned. When I asked the dealer, and when I called GM they say they've never heard any such thing. Does anyone know anything about this??
  • coontie57coontie57 Posts: 128
    I have no such problem with my 06 nor have I heard of similiar problems from my two buddies that have the same 06 trucks..
  • jklingel8jklingel8 Posts: 10
    Interesting that a mechanic mentions this, yet TWO dealers I spoke w/ today have never heard of it, and I talked w/ guys in the service dept, not sales. One serv guy even looked for bulletins from GM on it; nothing. If it happens to mine, you will all hear of it, for sure, as will our good friends at Good Wench. later. j
  • markpoffmarkpoff Posts: 2
    I experience the same with my 06 duramax that has only 20k on it. I have had it in to the dealership 4 times and they have reprogrammed glowplugs and checked for codes, etc, to no avail. They advised me to put in Stanadyne fuel additive to increase cetane levels and sulphur (lubrication), which doesn't seem right to me either. I have been doing that for 9 tankfuls now and there has been some improvement but only about 50%. Any more luck with your problem?

  • markpoffmarkpoff Posts: 2
    I also have an 06 Duramax truck that started smoking after about 1500 miles with white smoke at idle and thick black clouds on heavy acceleration. Multiple dealership visits have yielded minimal results. Glowplug reprogramming, code checks, etc and the only recommendation is to add Stanadyne to increase sulphur and cetane levels from ULSD that is currently offered at the pump. I am not happy and am looking for a better solution. Any more luck on your situatoin?
  • coontie57coontie57 Posts: 128
    I have an 06 and two of my friends do too. NONE of us have experienced this problem with fuel... You need to find another dealer!!

    We are all in different cities in NC, GA and MO so its not just our fuel stations.
  • goodcrdgoodcrd Posts: 253
    Check the sensor that senses EGR flow. If it is a delta P sensor like in the detroit's, the hoses leading to the sensor clog up with soot. A low EGR flow will be read and you will get too much egr which will cause incomplete combustion due to too much exhaust getting into the intake. If they use a boost pressure sensor these also clog up with soot and must be cleaned to read properly. The new emission systems are full of problems. It is mostly soot related clogging the sensor and turbo vanes on the VNT types. The Cummins turbo units use a different type that is self cleaning. Use ULSD as much as possible. But you will still need to clean the sensors and related parts when performance issues arise. Also one last note some of the early coolant cooled heat exchangers for the egr gases have been found to leak coolant internally (Coolant getting into intake) or clogging up with soot.
  • 03dmax03dmax Posts: 1
    The dealer told me that the 07 needs to run low sulpher diesel. Maybe try the low sulpher and seee if it makes a difference. My 03 smokes only when I put my foot into it.
  • grebbygrebby Posts: 1
    I live in southern California and I have the same problem intermittently. Usually on cold nights. Did you find any answers?
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