Def fluid

REWahoo wrote:

joebedford wrote:
I have a 2011 Duramax. The DEF tank was replaced TODAY because of sensor or heater or sender problem.

Was it replaced under warranty?

My dealer said the sender was bad in my 2011, it wasn't covered by warranty (less than 70,000 miles, still under warranty) and wanted $1,100 to replace the tank.

I added more DEF, the warning light went out and I'm still driving it.

Yes. I believe the special warranty is 10 years and/or 120000 miles.

Stored temps are also an issue, not just expiration date.

joebedford wrote:
I have a 2011 Duramax. The DEF tank was replaced TODAY because of sensor or heater or sender problem.

Was it replaced under warranty?

My dealer said the sender was bad in my 2011, it wasn't covered by warranty (less than 70,000 miles, still under warranty) and wanted $1,100 to replace the tank.

I added more DEF, the warning light went out and I'm still driving it.

I have a 2011 Duramax. The DEF tank was replaced TODAY because of sensor or heater or sender problem.

Last DEF tank fillup was Walmart brand. I usually use Blue DEF from Flying J.

Probably no connection.

SDM wrote:
Have a 2011 Duramax. Have had a sensor problem. Dealer says the def from Walmart is giving some problems. Any thoughts.

Tell your service advisor to take a hike... Your issue is a common problem with the 2011 GM's.

Me Again wrote:
In 40 thousand miles I have only used Peak Blue DEF in 2.5 gal boxes. All but one from WM. When it get to 1/2 on the gauge I drop by a WM and put in a box, and let them recycle the box.

I always check the date code. Here is a sample of how it works.

This is from a Dec 6th 2016 post on another forum.

The code on the box is "12170412431 A"
Doesn't look any different other then the "A" at the end

12 = where made

17= year made plus one

041 = days remaining in the year that is was made

2431 = Actual Batch code

DEF made today by Peak would have

xx19284yyyy code.

That is, it was made 284 days before Jan 1st 2019.

Chris

Actually the year minus one. So your example was manufactured in '16 so your way off.

Marion Blair does a good job of explaining this topic.

Link

Wild Card wrote:
They make a DEF refractometer. You can buy one at most auto stores. Take your own sample then you'll know.

Just don't get it on your hands...it stinks.

They make a DEF refractometer. You can buy one at most auto stores. Take your own sample then you'll know.

The Chebbie dealer is blowing smoke. Sensor have had problems from all of the big 3.

Ken

Happyemptynesters wrote:
As ScottG said to make sure it hasn't been opened. Have heard of people buying def fluid and after using then filling with water and returning it for a refund.

I have heard the same thing and always check seal under the cap before buying.