Hey guys, last thursday my truck went into the fail-safe mode and then started to sound like it was misfiring. I left it overnight and came back in the morning to take in the truck and it barely started and had a horrible knock. I had it towed in, for free with AAA, and left it for them to look at. They put some new injectors in and it would run fine but then they would fail later on. The tech told the service advisor that the fuel is contaminated and that the tank and lines need to be drained. Is this caused by the diesel gelling or the fuel from the gas station. It has gotten really cold here over night, approx. in the single digits. I had no additive because I thought it would be o.k. but obviously not... What do you guys think?

I would ask them what they mean by bad fuel? There are many reasons that fuel could be bad. I have found that if the techs don't really know what the problem is or GM is giving them a problem on warranty, they blame it on the fuel.

i'm from wisconsin and its been quite cold here. i have not run any additives on my truck or diesel powered equipment yet this year, and have not had any problems but the fuel stations switch to a winter blend fuel in late fall. so it sounds to me from what i have read here on DP that you got bad fuel from your fuel station

i'm from wisconsin and its been quite cold here. i have not run any additives on my truck or diesel powered equipment yet this year, and have not had any problems but the fuel stations switch to a winter blend fuel in late fall. so it sounds to me from what i have read here on DP that you got bad fuel from your fuel station


Bad fuel meaning it gelled up or bad fuel meaning from the pump. No winter blend down here. Wonder if that is the case

The responsible thing for the dealer to do is save the fuel and get it sampled. Then it is correctly documented. If not then they should shove it, mostly because their lack of doing the right thing. If it is bad fuel then the bill goes on you so I would think they must act responsibly. Alreay they acted stupidly in my opinion for not checking the fuel before throwing injectors at it. They should know by now to always check the fuel. It saves everybody from "he said, she said" crap.

Bad fuel will go back on the owner, which is another reason to have the fuel checked. You should always know where you bought your last tank from. Then you can co back on the fuel supplier if it really is fuel that caused the problem.

by bad fuel i meant like dirty fuel from the station. i don't know exactly what makes it bad but i have gotten some before,i was on a road trip getting 12mpg "pulling a trailer" fueled up and then got 8mpg and made lots of black smoke and my power went way down

If it is jelled because some bio was added, the truck could just be taken in somewhere warm - wait a while, start it and run it down and add some #2 to dilute along with a bunch of additive (or add Power Service 911 to ungell). If the fuel itself is full of water etc., I am not sure then........

Alright guys thanks for your input.