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Silverado/Sierra Duramax Diesel Problems & Solutions - READ ONLY

12 messages,  Last post on Nov 05, 2004 at 4:08 AM

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What is this discussion about? Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 2500, GMC Sierra 3500, Engine, Diesel, Fuel Efficiency (MPG), Truck

Messages Page 2 of 2

#3 of 12 Problems Persist.... by jgmilberg

Aug 20, 2004 (12:27 am)

Talked to my friend again and he said that he never got any less that 20 MPG with his '01, his '04 is only getting 10-13 MPG. When towing with his '01 he would get around 16-18 MPG, the '04 is only getting 5-7 MPG towing the same trailer with the same load. The oil did had fuel in it. The PCM has the latest calibration, and shows no trouble codes at all. He tried a few other dealers and 2 of them told him flat out that they do not have a diesel tech, the other, again said there is no problem that they can find. Another guy at work said they had the same problem and the same type of problem with fuel economy and poor power on his '03 his problem ended up being one or more liners. The dealer wouldn't even discuss this issue at all.

#4 of 12 by quadrunner501

Aug 20, 2004 (9:07 am)

Okay, I see your point now. It's a problem without a solution. Thanks for sharing those 2nd-hand experiences from your friends.

#5 of 12 Quadrunner501-Your Point? by jgmilberg

Aug 25, 2004 (1:59 am)

I posted here to find out if anyone else was having this problem and to see if they were able to get it fixed, not to have someone ridicule me for posting for a friend! If my friend had a computer he would do it himself. If you don't have any idea about what could cause the problem or possible fixes for it please refrain from posting. You said there was a TSB about the fuel in the oil do you have that TSB number? This is a new design for '04 and there could be bugs that need to get worked out, so if there is anyone out there with ideas on what to check please post them.

#6 of 12 Leaking Allison by younger

Sep 24, 2004 (7:24 am)

Hey all. Questions for you. I bought a 2004 2500HD with DMax and Allison about a month ago. All was going well until early last week when I noticed the tranny leaking fuel. so I took it in. dealer said is was an O ring the was shot, that was replaced. Well yesterday (a week later) same thing but much worse. GM engineers have been made aware of this problem, however from what I've been told, don't have a fix. Anybody hear of this? IF so, do you guys know of a fix? I'm absolutely heart broken thinking my truck is cooked here!
 
Thanks!

#7 of 12 Re: Leaking Allison [younger] by younger

Sep 27, 2004 (12:47 pm)

Replying to: younger (Sep 24, 2004 7:24 am)
I got the truck back and this is what I was told by the dealer. The bell housing on the tranny contained a groove where it would bolt on to the the engine block, actually part of the initial design. Since there are some problems being reported with leaking, the initial fix was a simple washer. However that wasn't working, so a new bell housing was put on without the groove. GM claims this is the fix, and that was coming from the engineers, so we'll see.

#8 of 12 Re: Leaking Allison [younger] by younger

Oct 08, 2004 (1:23 pm)

Replying to: younger (Sep 27, 2004 12:47 pm)
Well that wasn't the fix either. Two days later the leak continued. As I went deeper up the GM creditial list, I was told that I was one the few trucks with the problem, for now. So myself and my truck got to be the "test". What they finally fixed was the transmission pump. Apparently there was some pitting on the actually casting (poor cast), thus allowing the fluid to seap through. So this is where we are at. This was attempt 3, and if there is a 4th, the old Lemon Law will be kicking in.

#9 of 12 Duramax Start Issues by chrisg3

Oct 20, 2004 (8:22 am)

My 2003 Duramax has had some problems over the last six months. Mainly, it has been in and out of the shop because it won't start 80% of the time. I have to manually prime the fuel before it will start. Every time I pick it up from the dealer they say they have fixed it, which pans out to be untrue since I find myself, once again, priming the fuel manually. It is now in the shop again, for the 5th time. Unfortunately, I'm in my second year of ownership so the Lemon Law doesn't apply (to my knowledge). Has anyone else had this problem? What was the solution?

#10 of 12 Re: Duramax Start Issues [chrisg3] by younger

Oct 20, 2004 (1:28 pm)

Replying to: chrisg3 (Oct 20, 2004 8:22 am)
I'm not sure what state you live in, however this is my interpretation of Wisconsin's Lemon Law.
 
1. Problem has to originate within the first year of purchase
2. Problem has been attempted to be fixed 4 times within the life of the warranty
3. Loss of usage of the vehicle for greater than 30 days.
 
I hope this helps.

#11 of 12 NY Lemon Law by rayt2

Nov 04, 2004 (9:42 am)

Gives you 18 months or 18k miles for the same problem 3x back or more.
Been there done that.......
 
Ray T

#12 of 12 Re: Duramax Start Issues [chrisg3] by jaijay

Nov 05, 2004 (4:08 am)

Replying to: chrisg3 (Oct 20, 2004 8:22 am)
When was the fuel filter changed and by who. In many cases where the fuel filter is not installed properly the fuel system will lose prime.

Messages Page 2 of 2

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