|08-29-2011, 06:19 PM||eBay Motors #1 (permalink)|
Join Date: Aug 2011
Looking at getting a 2011 duramax and saw the requirement to change DEF fluid every 5,000 miles. What is DEF fluid and how much does this cost? I love my Duramax, but damn another fluid to change.
2002 2500 Crew Cab Duramax
|08-29-2011, 10:38 PM||eBay Motors #2 (permalink)|
Join Date: Sep 2010
Location: Palm Beach County Fl.
I thought you added more.
2013 GMC sierra 1500 sle 4wd
White Diamond crew cab
Traded 2011 GMC Sierra 2500 SLT 4wd with Duramax and Allison 6 speed.GMC Cargo Management toolbox and tonneau cover. Nitto Crossteks 275-70-18.
Daystar 2 '' Level in front.
CMS Toolbox is for sale in South Fla.
|08-29-2011, 10:40 PM||eBay Motors #3 (permalink)|
Join Date: Apr 2007
Location: Central Illinois
You dont change it, it is for emissions and used up in use of the vehicle.
I actually seen it for sale at walmart here last week.
Goes by John
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|08-29-2011, 10:47 PM||eBay Motors #4 (permalink)|
I'm That Guy...
Join Date: Aug 2010
Location: Mesa, AZ
Price varies where you buy it, it is used in the exhaust to treat emissions. Mileage varies depending on different variables like driving conditions.
Like mentioned it's a fluid filled up, not changed.
DEF isn't a bad thing. LML has good power and fuel mileage with a warranty.
|08-30-2011, 06:00 AM||eBay Motors #5 (permalink)|
Duramax Forum Supporter
Join Date: Oct 2010
DEF is a sacrificial fluid but it does have a shelf life of about one year. If you don't use it, you have to change it.
You can buy urea ( DEF fluid ) at most Pilot Travel centers at the pump and many parts stores....I sell it in half gallon bottles with a quick disconnect cap.
DON"T buy it from the dealer....they are marking the price up X10.
If you are pulling out on the highway a lot and not just poking around town, a urea fill will last for 10,000 plus miles between fill-ups
|09-08-2011, 09:21 AM||eBay Motors #6 (permalink)|
Join Date: Sep 2011
Tis a shame GM decided not to put a level indicator on the DEF reservoir. :/ am sure I read somewhere a % level is obtainable thru a scan tool(tec2 etc) but not 100% on this. Have considered fabbing up a dipstick to be able to randomly check the level, but again, with the possibility of contamination(which shows up on the DIC as poor quality DEF fluid) am yet to give it a shot. Ideally it would be a length of plastic, similar to whats found in between yella-tung flooring. currently using a brand known as Nonox, which states not to allow contact with any metal as cross contamination occurs.
Come on GM, give us an update for the DIC for the DEF level!!!
|09-11-2011, 04:14 PM||eBay Motors #7 (permalink)|
Join Date: Jul 2011
Location: NORTHERN NEW MEXICO
Does anyone know the actual milage you can go before adding fluid? I currently have about 4000 miles on my LML and have not added any fluid yet. I leave for an elk hunt this coming Sunday and was wondering if One Gallon is going to be enough or do I need to purchase more? I've really been babying it since I got it, with no towing yet and not getting on it.
Peenutt: 2011 LML Chevy Durfamax, Taupe Gray and stock for now.
|09-11-2011, 04:20 PM||eBay Motors #8 (permalink)|
EFILIVE,y u no DSP5 LML??
I'm at 5000 miles and according to my insight i still have over 60% left in the tank!!
also check this out: All about DEF
2011 Chevy LML. No DEF for me.
I got tint and tires but i'm not telling what % or what size......
Thanks to Willie at
|09-11-2011, 04:44 PM||eBay Motors #9 (permalink)|
Join Date: Apr 2011
Location: Haslet, TX
I think I filled mine about 9-10k dont remember. Dont worry about it until the 1k warning comes on.
2015 2500HD Duramax CC LTZ 4x4 Z71 Jet Black
Bushwacker Fender Flares - Color matched
MB Wheels TKO 20X9 8-180 +18BS / Nitto Terra Grappler G2 LT 305-55-20 121S E2
The old truck:
2011 2500HD DMAX LML CC LT 4x4 Victory Red
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|09-11-2011, 05:10 PM||eBay Motors #10 (permalink)|
Duramax Forum Supporter
Join Date: Oct 2010
DEF will last between 10k and 13k miles for most depending on driving conditions. The book says 5k but we are getting much more.
Don't sweat it....you'll get a warning well before you are out.