My 2005 LLY duramax became hard to start a few days ago. Then today it wouldn't start at all. Turns over but wont start. The fuel filter primer loses pressure after priming it. The only code showing up is a number three glow plug, but that code has shown up on and off for a while, and shouldn't make it impossible to start.
I had the same problem. The LLY is famous for developing a small crack in the fuel/water filter housing. Try priming the filter (loosen small nut, push down on primer until fuel seeps out of nut, retighten nut). The replacement of the housing is pretty involved, so you might consider having a professional do it.
Just had this problem it was the PDM ended up replacing the glow plugs
best price and life time warranty for both was at Auto Zone recommend if you buy the PDM get the extension cable and move the PDM to a cooler location
SOURCE: I have a 2005 2500HD Duramax. I keep getting air
I would suggest checking the water sensor in the bottom of the fuel filter. It's made of plastic and I've heard of them developing small cracks.
SOURCE: 2003 GMC Duramax Diesel won't start
I see that you had the injectors replaced 20,000 miles ago. I would still check the oil to make sure it is not overfull. The new injectors could be bad. If the oil level is not overfull then get a paper towel and touch the dip stick tip on the paper towel while oil is on the dip stick. If it's only oil it will not spread. If it has diesel in the oil the oil with spread. If this test doesn't show the injectors to be bad then you have three other possibilities. The FICM (fuel injection control module), the fuel pressure regulator, or the injection pump. It's hard to pinpoint what the problem is without running more tests and the only way to run those tests is with the computer the dealership has. Just so you know your injectors are still under warranty until 100,000 miles. Most likely you will have to take it to the dealership to get you truck fixed. I hope this helps you some.
SOURCE: Problem with a 2006 GMC 3500 duramax. Under heavy
could be some bad injectors...does it smoke real bad?
SOURCE: how do I change a fuel filter on a 2005 gmc sierra
u need to have the dealer do this or u will end up with a no start, it requires special tools and procedures
I'm
sorry but I believe you have this posted in the wrong product
category? Please re-post the question in the proper category if this
is the case, otherwise you have my apologies. This is the car and
truck problem category
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