just got back from a 1400 mile trip and on the way up there i stopped to sleep and let my truck run from like 12;30AM to 6;30am to have AC. everything was fine and no problems at all. i got all set to hit the road and when i took off my truck was blowing white smoke. but not at idle. the truck ran fine and all too. after like 3-5 minutes of driving it was gone. i checked the oil and it was fine also. my neighbor told me it could be something about the injection and to take it to the stealer because its not suppose to do that. anyone know what could cause this? :confused:

thats odd

could have been unburned fuel lingering in and around combustion area....

My truck idles at about 300 degrees, and which may not be enough temp to burn fuel completely....

I had a LB7 doing that. Had someone say it was a sign on injectors going bad. Buddy of mine scanned it and all injectors wasnt doing good at idle. Traded it in a week later.

anyone else know? im wondering if i should take it to the stealer

If you still have warranty coverage then absolutly!

If you still have warranty coverage then absolutly!

Says hes got 38K. 06 Warranty ends at 36K...

Says hes got 38K. 06 Warranty ends at 36K...
Could have bought an extended warranty.

If it runs good then dont worry about it. I have been driving truck for 20 years and when you let them run for an extended period of time the unburned fuel and parafins build up in the combustion chamber and the exhaust system. Then when you take off it will take a minute or so to get the exhaust temps up to burn all that crud off. It could take a while longer to burn everything out of the cat converter. All this = white smoke.

I think there is a thread for this already...mine does this also..forgot what was said about it... I don't think its anything

i have 100,000 mile warrenty on the motor and tranny. body is 36000. wouldnt that still be covered?

i have 100,000 mile warrenty on the motor and tranny. body is 36000. wouldnt that still be covered?

Yep!

Says hes got 38K. 06 Warranty ends at 36K...

100,000 on motor and tranny. 36,000 on everything else, so his white smoke should be covered if there is anything wrong.

If it runs good then dont worry about it. I have been driving truck for 20 years and when you let them Idle for an extended period of time the unburned fuel and parafins build up in the combustion chamber and the exhaust system. Then when you take off it will take a minute or so to get the exhaust temps up to burn all that crud off. It could take a while longer to burn everything out of the cat converter. All this = white smoke.

This is exactly it. Diesels don't particularly like idling for extended periods, as they tend to get too cold to burn off all the impurities in the fuel. This ends up being white smoke. As far as damage to the engine, or the injectors being bad: doubtfull. I would wait untill it is making white smoke all the time before I asumed the injectors were going south.

Wouldnt hurt to have a look at em through a scanner.

I wouldnt worry about it mine does that too.

100,000 on motor and tranny. 36,000 on everything else, so his white smoke should be covered if there is anything wrong.

Thought that only applied to 07 and up...our 06 has a 36 on everything including drivetrain.. :confuzeld

thanks for all the replys guys. hopefully its not a problem. when it happened it sucked major ass though because i had a fully loaded trailer in bufu kentucky at a pilot.

i will watch it close for white smoke. at idle it puts a very little puffs of white smoke (barely any at all) but its done that since it was new. ive read about the LBZs making a little smoke at idle.

Thought that only applied to 07 and up...our 06 has a 36 on everything including drivetrain.. :confuzeld

i dont think thats true, when i bought the truck the stealer told me i have 100k on the drivetrain and 36k on the body. ;)

100k motor...36k everything else including Allison

anyone else know? im wondering if i should take it to the stealer

I drag campers for a living and under extreme weather conditions I will idle for a few hours and what your expierenceing is not an issue. it's unburnt fuel and moisture that collects in the system and burns off when your EGTs get up in operating temps.

Big Dog
Fire them Diesels up boys!!
06 LBZ 220k

100k motor...36k everything else including Allison


the allison is part of the powertrain covered for 100k miles

its unburnt fuel go to a truckstop over nite and watch when the semis take off in the morning will blow it out till motor or egt get hot again to burn it off.

can become hard on your rings with build up.

i wouldnt suggest doing it long periods.

thats why im my semi when i idled i would rev it up to like 1000 rpm to some what keep the heat to burn it off and where it would idle smooth.

as far as i know all duramax engines have the 100k warranty, pre 07 is 36k on the rest. 07 and later is 100k moter, tranny, all the drivetrain parts xfer case, axle, diffs, driveshafts.. but not wear parts, like tires and brakes. Whatever isn't drivetrain has a 36k

as far as i know all duramax engines have the 100k warranty, pre 07 is 36k on the rest. 07 and later is 100k moter, tranny, all the drivetrain parts xfer case, axle, diffs, driveshafts.. but not wear parts, like tires and brakes. Whatever isn't drivetrain has a 36k


im sure i have 100k warrenty on the drivetrain. i remeber them telling me that when i bought the truck

The smoke could also be an accumalation of oil from the pvc. Either way it should not be a real problem. I think to 06 warranty is 100K for engine and 36K for everything else.

The smoke could also be an accumalation of oil from the PCV. Either way it should not be a real problem. I think to 06 warranty is 100K for engine and 36K for everything else.

Fixed it for you.:rolleyes:

mine does the same..... it runs all day at work and when it's warm out it really smokes alot when i take off..... nothing to worry about