Gasoline in my 6.6 Duramax

[Javy]

I own a 2004 GMC with 33k miles.
Last night my designated pumped gasoline in my Duramax.
Gas gauge was in the RED and pumped $20 of unleaded gas.
My truck quit after driving about 10 miles up a montain road.
How much "long term" damage might this have caused ?
Do I dare take it to GMC dealer to drain gas and purge fuel lines
since they might VOID my extended warranty ?
Thanks

[Robyn]

Siphon the tank out well and fill with fresh fuel and change fuel filter.
The unit should recover ok. The Durabucks does not use a pump like the 6.5 so it should be ok once you feed it what it likes.
RC

[Javy]

I talked to the Gale Bank Engineering tech guys and told me that if
the engine shut down at idle,they wouldn't be concerned.
The fact that it shut down under a load climbing a mountain
is a concern.
I realize there are other threads regarding this but my concern is the
high concentration of gasoline versus diesel in my tank at the time of shutdown.
Thanks

[DmaxMaverick]

There will be several here that will preach otherwise, but I say no harm done. My significant other(s) made a habit of pumping the wrong fuel into EVERY Diesel (5.7, 300D, 6.2, 7.3, 6.5, 6.6) I've had since day one. It's gotten much better lately, though.

If you have $20 of #2 in it, that's not much, these days. I say fill'er up, bleed it, and run out the fuel. Fill up again at 1/2 tank, and don't look back. Adding a little extra additive in the meanwhile will help with the missing lubrication. The gas at less than 25% won't hurt anything. At all. If it makes you feel better, drain the tank first, but nothing will be gained.

Anyone that believes otherwise can show up with evidence gas has ever harmed a Diesel engine. If the Diesel concentration is too little, the engine just quits. Only damage that can happen is lack of lubrication if the mix is ran for too long. Add some lube, and don't worry about it. Don't worry about changing the fuel filter, either, unless you think you got some dirty gas. If you think you've never ran gas in your Diesel engine, think again. There will be at least 5% in every tank you pump from your favorite supplier, and most of the time much more. Pull a sample and check it out. You may be surprised.

[Kennedy]

It's not a good thing to do, but it's done and you are not the first. 9 out of 10 drain, refill, etc w/o issues. Occasionally we hear of the poor guy who paid $15k for a new engine (or submitted to Insurance) which was probably unnecessary.

I think there are a lot of scammers out there that would try to rip a guy off in this position...

[JoeyD]

Change out the filter as well. I say no harm done.

[Gordon Marks]

I'd agree w/JK. I've had the pleasure(???)of doing that to both my 99 L65 AND the DMAX in the 99. Both times, it took me almost 20 gal(it's a 42 gal tank)before I smelled something amiss(OK, I'm SLOW but remember, I'm OLD). I just went in & bought a gallon of oil, put it in the tank & went on.
The 6.5L ran another 100K before it gave way to the DMAX. The DMAX about 2K w/no problems.
Granted, neither time it ran very far before I added the oil.