198,000 miles on 01 duramax.
Smokes like a friggin freight train, going into limp mode at 2000 rpm with 0093 code. Stealership did diagnostic and tried to charge me 180.00 instead of 86.00. They said #8 injector stuck wide open, #2 is closed and all others are border line. Also they said injector pump needs to be replaced. All for only $8658.00, pretty good deal wouldn't you say! I called gm with no help, they said sorry it has to be high return rate. 2 injectors were replaced around 60,000, then at about 80,000 all 8 were replaced. Any suggestions? I live in Georgia around Monroe. I wouldn't recommend Nash Chevrolet in Lawrenceville to anybody, they said if gm wasn't paying them they could not help at all.

go to another shop. If you bitch enough to gm they might give in,they did for my brother.and they put injector lines on too.

i would agree!! call gm get a manager on the phone!!and go to another dealer!!i had a problem awhile ago and did this and the problem was solved!!

Tried to be nice for 5 days. Been bitchin for 2 with no luck. Maybe I should try another dealer but I,m gonna get tired of paying all these diagnostic fees! I have already told the stupidvisor at customer service to kiss my arse! and I'll never buy another gm product.

Does anybody know why an injector that is stuck open is not a defect like the ball seat errosion or the cracked body? There are least two posts on here where an injector stuck open melted or damaged a piston.

How would you know if one was stuck open? Black smoke?

Sorry to here about your problems, but my guess is that you are SOL with GM.

Does anybody know why an injector that is stuck open is not a defect like the ball seat errosion or the cracked body? There are least two posts on here where an injector stuck open melted or damaged a piston.

How would you know if one was stuck open? Black smoke?

Sorry to here about your problems, but my guess is that you are SOL with GM.
I am pretty sure those failures would cause fuel to get into the oil.

I just priced out an inj pump for one and it was around $4000. so adding the injectors you would be about right at $8000. did the dealer do a fuel return rate test??

I am pretty sure those failures would cause fuel to get into the oil.

I don't think so, wouldn't it just over fuel that cylinder and over heat it? Then when it fails the fuel would get in the crankcase :cool:

Most of the fuel in the crankcase comes from cracked injector housings or bad connections at the injector under the cover, from what I have read.

Yes, they said hi return rate was not the problem. Injection pumps wholesale are around 618.00

I thought Generous Motors was warrantying these things to 200,000 miles???
I must have misunderstood something.

The special policy is very specific in what symptoms it covers, and they must be confirmed by high fuel return rates.

http://www.dieselplace.com/forum/attachment.php?attachmentid=44988&d=1189213609

Maybe the customer service manager could tell I was bluffing, because I could never drive a ford!

How about a yota?

i'm a gm tech and we warranty these things for 200k thanks to gm. only certain vin break points. if the injectors have high return rate thats the warranty issue. with out removing top covers there is no way to check injectors on older duramax and if injectors are stuck injector pump will not show enough pressure on scan tool. if no help with dealer 1-800-gmc-truc is a number ask for assistance due to extended warranty coverage. warranty reps are the only ones that can deny claims at dealership.

How about a yota?

:drop_mout You know you're wrong for that....right? :drop_mout

I don't think so, wouldn't it just over fuel that cylinder and over heat it? Then when it fails the fuel would get in the crankcase :cool:

Most of the fuel in the crankcase comes from cracked injector housings or bad connections at the injector under the cover, from what I have read.
where do you think a cracked housing will leak into? I think the ball seat is on the side of it also causes fuel in oil.

i'm a gm tech and we warranty these things for 200k thanks to gm. only certain vin break points. if the injectors have high return rate thats the warranty issue. with out removing top covers there is no way to check injectors on older duramax and if injectors are stuck injector pump will not show enough pressure on scan tool. if no help with dealer 1-800-gmc-truc is a number ask for assistance due to extended warranty coverage. warranty reps are the only ones that can deny claims at dealership.


im getting scared to keep my LB7 now.......... no issues but man I dont want to deal with all that! plus I dont have 3k layin around to get it fixed....

I just checked with another guy in the shop ball seat erosion would leak into combustion chamber. so as far am i am cocerned a stuck open ionjector should be covered by spec policy. anf that would cause high return rates.

That sounds awful fishy that that dealer would say that, we had someone come in right before the warranty was out that had an injector stuck open just like yours and with no questions asked i had him a new set of injectors ordered under warranty that same day. and we did NOT charge him a fee for scanning the truck either. i would be willing to bet that the dealer probably wrongfully warrantied them in the past and GM might have made them eat the cost on them. (just a guess though)

im getting scared to keep my LB7 now.......... no issues but man I dont want to deal with all that! plus I dont have 3k layin around to get it fixed....




But just think about all of the depreciation you are saving!

That is my incintive to keep it, and after 179,000 miles it is proving to be a really good truck!

Just ordered 8 injectors and a injector pump, be here tomorrow ouch $$$

how do they know the inj pump is bad with leaking injectors. pump wont build enough pressure if injectors are bad??

how do they know the inj pump is bad with leaking injectors. pump wont build enough pressure if injectors are bad??
yea! I would of put the injectors in first then retest the fuel system. I would still do that and if you don't need the injection pump return the bitch.

swap in a used lly would be more practical than having the lb7 fixed.

where do you think a cracked housing will leak into? I think the ball seat is on the side of it also causes fuel in oil.

Obviously a cracked housing leaks into the head area, and into the crank case. Not all injector failures happen this way

I believe the seat errosion does not leak into the head area, it just causes more fuel to return, thus the problem.

An injector stuck open is obviously over fueling, dumping fuel directly into the cylinder, where it could get into the case via the ring end gaps if not burned.

I never had fuel in my oil.

Does any body have a diagram of an injector?

Was surging at idle earlier. Fuel pressure regulator was determined to be bad. Going into limp while towing loads. While I'm in there might as well replace and be sure.

What does high fuel return mean exactly.

If it means what it sounds like it is too much fuel be returned to the tank rather than being injected.

In that case how could it have high return rates with a stuck open injector?

Injectors and injection pumps do not go bad at the exact same time. I would bet your injection pump is fine it just can't keep up with all the fuel running out of one of the injectors

What does high fuel return mean exactly.

If it means what it sounds like it is too much fuel be returned to the tank rather than being injected.

In that case how could it have high return rates with a stuck open injector?

Injectors and injection pumps do not go bad at the exact same time. I would bet your injection pump is fine it just can't keep up with all the fuel running out of one of the injectors

Yes, too much fuel returned, has a hard time or can't build rail pressure.

I would tend to agree with the statement about no high return rates due to the injector stuck open. Holeshot never said he had high return rates (first thread). Mike seems to think it would, but from the few other posts that report injectors stuck open in this forum, none seem to have hi return rates.

I would tend to agree, fix the injectors and see what the pump does.

Was surging at idle earlier. Fuel pressure regulator was determined to be bad. Going into limp while towing loads. While I'm in there might as well replace and be sure.

If ur going to do it yourself or anyone else is interested, check out my thread, "LB7 Injector replacment hints/tips" post, if u need any help PM me and i'll do my best and if not lotsa other DP members have been there, done that, so good luck!:D

Does not have high return rate.

I just got my truck back last week. They replaced all 8 of my injectors, all the injector lines, and the water pump( it was leaking) and it ended up costing about $200. The white smoke was not all that bad, the idle was rough. the tech waited for the balance rates to get to a point where it was obivous and then took the snapshot with the tech 2. I had my superchip and edge removed. No issue at all. Find another dealership.

keep trying dealerships till one does the work. A buddy of mine tried 3 different dealerships till one finally did the warrenty work.

Not totally related but this is one of the reasons I buy my trucks where I buy them. The people there do not give me a ration of crap when there is a problem, they just take care of it. If there is any "gray area" they will make sure it is to the customers benefit.

198,000 miles on 01 duramax.
Smokes like a friggin freight train, going into limp mode at 2000 rpm with 0093 code. Stealership did diagnostic and tried to charge me 180.00 instead of 86.00. They said #8 injector stuck wide open, #2 is closed and all others are border line. Also they said injector pump needs to be replaced. All for only $8658.00, pretty good deal wouldn't you say! I called gm with no help, they said sorry it has to be high return rate. 2 injectors were replaced around 60,000, then at about 80,000 all 8 were replaced. Any suggestions? I live in Georgia around Monroe. I wouldn't recommend Nash Chevrolet in Lawrenceville to anybody, they said if gm wasn't paying them they could not help at all.

I'm selling 4 brand new injectors, plus I have 4 injectors from my old motor. PM me if you are intrested. I will cut you a good deal and save you some bucks.

Just ordered 8 injectors and a injector pump, be here tomorrow ouch $$$

wish I could have gotten to you sooner

for like 8 grand u can get a complete motor

everyone says find a new dealer...with 198k on it, his warrenty will run out before he finds one

Total price for everything, 8 injectors, injector pump, new t-stats, misc. hoses and labor $3500.00. Not to bad considering stealership wanted $8658.00 less hoses and t-stat. Pretty much a rip off. That would have been a hell of a GOOD WILL price, maybe for them. I'm tired of haggling and messing around with them. It will not be to there benefit in the long run! What pisses me off is I sent my son to them a month ago and he bought a brand new fully loaded Duramax retail $54,500.00!

Hey holeshot21

How much are the injectors a piece, just wondering?

Rich

for like 8 grand u can get a complete motor
more like 13 or 14K

Hey holeshot21

How much are the injectors a piece, just wondering?

Rich

Injectors are $250 a pop. Usually 4 injectors (one side) is around $2500 this includes labor. All 8 would be double that $5000. Also the old injectors are $100 core. So for all the work he had done that isn't a bad price. You pretty much have to take the T-Stat out to pull the injection pump so might as well put a new one in.

Got a good deal on injectors $220.00 each from a different dealer. I wasn't comfortable about buying rebuild off e bay $159.00

You can buy complete engine with new injectors, turbo, everything on e bay for $9850.00

You can buy complete engine with new injectors, turbo, everything on e bay for $9850.00
plus labor right thats gotta be 18 or 20 hours, dont know never did one yet.

I'm sure it would be at least 12 to 13 with labor.

Injectors are $250 a pop. Usually 4 injectors (one side) is around $2500 this includes labor. All 8 would be double that $5000. Also the old injectors are $100 core. So for all the work he had done that isn't a bad price. You pretty much have to take the T-Stat out to pull the injection pump so might as well put a new one in.

If they give $100 for the cores they must be rebuildable... Are there rebuild kits for them? Sorry for the dumb question, I've rebuilt many tractor injectors, very easy. Just wondering.

You can buy complete engine with new injectors, turbo, everything on e bay for $9850.00

If you weren't comfortable about buying $220 injectors on Ebay for $159, why would you be comfortable about buy the whole engine for $9850?

If they give $100 for the cores they must be rebuildable... Are there rebuild kits for them? Sorry for the dumb question, I've rebuilt many tractor injectors, very easy. Just wondering.

falures are commonly cracks in the body in one way or the other and that nets us with a pile of used crap with no home. as crappy as replacing them is, im stickin with new ones which are an updated design. now if someone had some bad@ss injector bodys made of a better material, i'd be all over that! My dream still hasn't come true yet.:(

If they give $100 for the cores they must be rebuildable... Are there rebuild kits for them? Sorry for the dumb question, I've rebuilt many tractor injectors, very easy. Just wondering.

As it was explained to me by the Service manager at the local dealer here, the replacement injectors are rebuilds. They are using new cases but original internals. I guess the thought is the new cases won't crack and last longer??? I don't know. I also don't know if they sell a rebuild kit. With all the injector problems on LB7's I would be willing to try aftermarkets.

You can buy complete engine with new injectors, turbo, everything on e bay for $9850.00

I got a complete engine from a salvage yard for 6k out of an 04 w/44k. That includes a 1k core, so really 5k. Plus shipping of course.

As it was explained to me by the Service manager at the local dealer here, the replacement injectors are rebuilds. They are using new cases but original internals. I guess the thought is the new cases won't crack and last longer??? I don't know. I also don't know if they sell a rebuild kit. With all the injector problems on LB7's I would be willing to try aftermarkets.

All aftermarket inj. use stock bosch bodys as far as i know, everyone i've taked to hasen't heared of any other option as of now either. If anyone knows of some, PLEASE POST, i want some!

I wanted to make sure they were rebuilds from Bosch. The engine I checked out was new injectors and turbo. I'm not knocking e-bay, I spend my share of money there!

I'm sure it would be at least 12 to 13 with labor.
2002 Chevy Truck K 2500 P/U 4WD V8-6.6L DSL Turbo VIN 1

alldata says 18.8 including transfer of all parts

All aftermarket inj. use stock bosch bodys as far as i know, everyone i've taked to hasen't heared of any other option as of now either. If anyone knows of some, PLEASE POST, i want some!

here is my solution........

http://www.dieselplace.com/forum/showthread.php?t=184275

Good one ^ ):h

everyone says find a new dealer...with 198k on it, his warrenty will run out before he finds one

I don't think it's the mileage that's causing GM to refuse the warranty. His truck could have been put into service as long as 7 years ago. That means the time requirement expired 2 years ago. When GM agreed to extend the warranty on the LB7 injectors to 200,000 miles, did they increase the time any? I don't know, but that may be why they're refusing warranty work.

7yrs/200000 miles, whichever comes first.

7yrs/200000 miles, whichever comes first.

Thanks, I didn't know. In that case, they should honor the warranty and replace them. BBB arbritration should be considered.

The 200,000 mi warranty is only on the injectors.Still trying for 25 posts.

How does a reg guy afford these trucks ? I'm a repair tech and wonder what I got myself inyo with this expensive vehicle . Maybe college would have learned me not to buy it?

The 200,000 mi warranty is only on the injectors.Still trying for 25 posts.


Sorry mispost.

How does a reg guy afford these trucks ? I'm a repair tech and wonder what I got myself inyo with this expensive vehicle . Maybe college would have learned me not to buy it?

A reg guy isnt suppose to afford 1 and GM doesnt want u or I fixing these trucks or building our own motors.. I own a engine rebuilding shop and with Gm making crate motors for racecars,hotrids etc the last few years with there push we are all but out of buisness.And with the economy as bad as it is here in the east and going to get worse we are in trouble.I take all jobs just to surrvive.I bought my 04 thinking it was agood choice (Til it needs work) cause the common guy cany fix them like i could rebuild or replace evry part on my 1988. Is the 04 better YES much but it will cost me when it needs fixing.Is there a way to check vin# to se if INJ`s have been replaced.sorry for the rant but i was very happy with my new 04 but wish i would have gotten the 04.5 or up with no injector worries :o:

:rant:

There is a VIN check forum at the top.:welcome:

i think you're all being a little more pessimistic than need be. Sure injectors can go bad and cost you say $4000. Now it's very unlikely that anyone of us will see $4000 a year in repairs on average(except maybe the hot rodders who 'purposely' break stuff). My 5 year expired last friday but I'm not worried. In 5 years and 74000 miles i've had 1 set of injectors(warranty), water pump leak($100 deductable), 4x4 push button switch $65, $210 wheel bearing replacement(myself) and 1 tailgate handle and bucket(my own stupidity). I also did the merchant pump upgrade(250) but that is purely optional since I may not have ever had the problem, but I preferred to play it 'safe'.

Tires, fuel filters, serpentine belt are all maintenance items, so those will occur on any vehicle.

On paper my truck is still worth around $25,000 retail, so I've lost roughly $11,000 over what I paid for the truck off the lot. Add in the $750(rough estimate) for repairs I've had to make with out of pocket costs. So add everything up(round to an even $12000) and it's costing me $200 a month(not including fuel, oil, tires etc) to own this truck. That's actually pretty cheap all together.

Sure a $4000 kick in the pants could hurt at one fell swoop, but over 12 months it's 333 a month. and that's if every 12 months it needed a major repair which it likely won't. I dare you to find me a full size nice car that I own(no lease) for <$350 a month over 5 years and I guarantee something will break on that as well in that time that I'll enjoy as much as this truck.

now.....fuel prices that just plain sucks!!

i think you're all being a little more pessimistic than need be. Sure injectors can go bad and cost you say $4000. Now it's very unlikely that anyone of us will see $4000 a year in repairs on average(except maybe the hot rodders who 'purposely' break stuff). My 5 year expired last friday but I'm not worried. In 5 years and 74000 miles i've had 1 set of injectors(warranty), water pump leak($100 deductable), 4x4 push button switch $65, $210 wheel bearing replacement(myself) and 1 tailgate handle and bucket(my own stupidity). I also did the merchant pump upgrade(250) but that is purely optional since I may not have ever had the problem, but I preferred to play it 'safe'.

Tires, fuel filters, serpentine belt are all maintenance items, so those will occur on any vehicle.

On paper my truck is still worth around $25,000 retail, so I've lost roughly $11,000 over what I paid for the truck off the lot. Add in the $750(rough estimate) for repairs I've had to make with out of pocket costs. So add everything up(round to an even $12000) and it's costing me $200 a month(not including fuel, oil, tires etc) to own this truck. That's actually pretty cheap all together.

Sure a $4000 kick in the pants could hurt at one fell swoop, but over 12 months it's 333 a month. and that's if every 12 months it needed a major repair which it likely won't. I dare you to find me a full size nice car that I own(no lease) for <$350 a month over 5 years and I guarantee something will break on that as well in that time that I'll enjoy as much as this truck.

now.....fuel prices that just plain sucks!! I like the way you put that. It actually made me feel much better since my warranty is up in 2 weeks. Also, I am self employed , and since this is a HD truck, used for my business, I saved about $11,000 in taxes last year.:D Now next year is another story... Maybe I need a new one...;)

can 2006 heads be put on a 2001 eng. and would this get rid of the injector problem

My dealer say NOPE too. They just stopped talking to me...gave truck back. Herrin Gear Chevrolet in Jackson, MS.

Poor service. I picked my truck up from valet at dealership and check engine light was on. Unreal.

can 2006 heads be put on a 2001 eng. and would this get rid of the injector problem

Nope. The LB7 injectors are totally different, a different voltage, etc. You would have to change the ECM and lot's more.

I like the way you put that. It actually made me feel much better since my warranty is up in 2 weeks. Also, I am self employed , and since this is a HD truck, used for my business, I saved about $11,000 in taxes last year.:D Now next year is another story... Maybe I need a new one...;)


My 2002 has cost me more than $5,000 in repairs in the 2.5 years I've owned it. Paid 28.5 K for it then. now it's worth 17 k tops that's a loss of 16.5 k in 2.5 years. I could have leased a nice truck for that amount.
Every time I go out of town I make a mental note of where the local GM dealer is. These trucks are great trucks until you need to fix them.
A $8,500 repair (first post) on a truck thats only worth $15,000 is bs.



Edit, I meant to get the whole post on this reply.