3 l complete shutdown

[3.0]

So driving down the highway pull out to pass snow plow and half way past the motor goes to reduce power but get just past snow plow and then it completely shuts down with the snow plow on my butt and just have enough roll to get on the shoulder.After 2 days in the shop they say It's bad fuel which I question because I've been buying from the same pump since 05.Also said the fuel filter was only partially filled which I see as either fuel pump failure or there's a problem at the pickup. So have to see what happens however the other thing Ive learned is the starter once engaged will not stop for 30 -45 seconds regardless of whether the engine starts and there is no way to stop it, another gm engineering program at it's best,,really hard on the battery as well. Also if you have to get towed apparently the new gm trucks have no frame holes to put the hooks into ,it will also tear off the valance when they winch it onto the deck but Ill let roadside assistance ( I don't know how they have the nerve to call it that  ) worry about that since they hired the tow company.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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[davester]

If where you filled up doesn't have the right mix of diesel, and the temp drops, the fuel can gel while you are driving and plug the filter....

 

It happened to me driving a 4-banger Toyota diesel, filled up with Diesel in Calgary going on a ski trip, truck just died on the highway past Canmore.  3 hours later, when my and my friends dads came to pick us and the truck up, the temp had gone up a bit and the truck started and ran no problem...

[3.0]

The service department says it was a fuel issue not really buying it though as this truck has a screen in the tank,a water in fuel sensor,a fuel heater and a water separating fuel filter to get past and warn you theres an issue and it still shut down completely..

[Jay P]

9 hours ago, 3.0 said:

The service department says it was a fuel issue not really buying it though as this truck has a screen in the tank,a water in fuel sensor,a fuel heater and a water separating fuel filter to get past and warn you theres an issue and it still shut down completely..

None of that will tell you the fuel has gelled. I have owned many diesels and they will just shut off if the fuel gels. Pure #2 diesel can gel at 20 deg F.

 

Jay

Edited December 29, 2020 by Jay P

[3.0]

I too have owned and driven many diesel trucks ( even dumb enough to through money at performance  6.6 with 700+hp) since the 90's and only once did I have gelled fuel (Alberta -35 ) and the truck still ran for 12 hrs only in limp mode.The dealer that I purchase from since 05 tells me he changes to winter fuel in Oct. and my last tank full before the incident was December so I really hesitant to blame the fuel with all the sensors and a heated fuel line  but anything is possible.

[3.0]

So the problem has been found but the resolution may be a long ways away.The issue is a faulty fuel line which caused  loss of prime in the fuel filter causing the system shutdown the solution is to replace the faulty parts the realty is the part  is on back order for the foreseeable future.It now becomes a waiting game.

[Jay P]

Glad they found a problem. I'm surprised they can't replace it with some off the shelf fuel line until the part comes in.

Sounds like the early 6.6 Duramax issue with the fuel line between the tank and engine getting soft and collapsing.

 

Jay

[3.0]

From what I've been told it's a connection and of course this is a completely different fuel system from any they previously have used.