[woodchuck2]

Started my truck as normal at 10:00 am and drove it for an hour. Went to restart it at 1:00 pm to put plow on before going to work. Glow plug light stayed on for 10 seconds before i shut off the key. I let it sit for a minute and just cranked it over so the light would not come on again. Started right up but the SES light came right on. Called the dealer and they are going to look at it on Monday. Same thing happened after work tonight but i cranked it after 7 seconds and it started right up and the glow plug light went out as soon as it started to crank over. SES light still on, still running fine. Anyone else having this problem yet? Already had the GPCM flashed for this problem last year and a new PCM put in it also this summer. :confuzeld

 

[Rcher]

Check the "Sticky"

http://www.dieselplace.com/forum/showthread.php?t=73489

Sounds to me like the original problem or you have a bad glow plug.

 

[woodchuck2]

I am going to assume it is probably a glow plug also unless there is a problem with the GPCM. The only way the glow plug light will go off is to immediatly start it after 5-7 seconds or turn the key off. Its been about 20-25 degrees out and the light is coming on even if the vehicle has sat for only one or two hours after being driven to operating temp's. I will find out Monday, will keep everyone posted if this is going to be new problem or just a fluke with my truck.

 

[donny]

I had that issue a last year on my 06, 3 of the plugs over heated and cracked of into the cylinders. it runs fine youll have to have it serviced, and not to scare you but i had 3 pistons and both heads replaced because of it

 

[woodchuck2]

I hope the motor is ok, the first time it did it i shut the key off after 9-10 seconds and let it cool for a minute. Since then i start the truck after 5-6 seconds of the glow plugs being on. They shut off as soon as the motor begins cranking. When i called the dealer the service advisor told me not to worry about it unless the glow plug light is flashing!!! Like he is a diesel tech-NOT. He also asked why i was worried since it is under warranty, I had to remind him that i use it to plow and it is winter and that the rental CAR that i will be put into for the 2-4 weeks that it takes to get a new engine probably wont plow my driveways. No less the fact that i am not paying for a $43k truck so i could drive a cobalt or a cavalier.

 

[donny]

mine did the same thing, glow plug light would stay on til the motor cranked. and the SES light tripped. I faught and faught and they wouldnt replace the motor, truck was 4 months old and they replaced pistons and heads. the damage is most likely done, and the chips have blown out, but id still get it in as soon as u can.

 

[woodchuck2]

It goes to the dealer in the morning at 11:00, dont expect to be driving it home for awhile. The service advisor told me to drive it until tomorrow and that was on friday. He has already put it in the computer so between my call and the history that they can pull with the tech-2 they will know exactly when it happened and how many miles i have driven "about 450 miles". This guy knows i used to be a GM tech at another dealership down the road about 4 years ago so he knows not to BS me. I wasnt a diesel tech but i still have an idea of what is going on. He already told me not to worry about the engine and that they would replace it if needed. Apparently this hammerhead does not know what the d-max costs. But he will probably know soon. I will post again tomorrow when i get home so everyone knows whats going on with this problem.

 

[woodchuck2]

Got my D-Max back from the dealer, the tech told me it had a po678 code for #8 cyl. glow plug circuit failure. He checked the history and confirmed that i had the recall done last year by another tech. New glow plug is ordered. He is claiming that no damage was done to the other glow plugs or the engine.

 

[Rcher]

He is claiming that no damage was done to the other glow plugs or the engine.

How would he know that unless he pulled #8 plug? I still have the bad GP that was pulled from my engine. Some of it was missing and never recovered. I would insist on inspecting the bad plug to make sure its intact.

 

[woodchuck2]

I had the glow plug replaced today, the tech showed me the glow plug and the tip was still intact. The tech told me it was just a circuit failure so it must have been an internal problem with the plug. Dont know much about them so he could be blowing smoke up my a** or I guess I got lucky this time. Time will tell for sure, it has the gmpp extended warranty so the drivetrain is now covered to 115K and everything has been documented. It still runs great, it is a little quieter now on a cold start and the fuel milage is the same. The glow plug light goes off after about 2-3 seconds like it used to. Hopefully all is well.