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Duramax Fifth Generation: 2011-2016 (LML) Discuss the fifth generation (2011-2016) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

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Old 01-22-2018, 08:36 AM   #1 (permalink)
ataboy
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175 miles to max 65mph???

Got this message Friday on my 2015 GMC. Check engine light and service emission system came on. Dealer doesn't know what it means either? Truck has 66,000 miles on it so I would imagine no warranty left? The dealer did do a recall on it for the def tank heater about 2,000 miles ago.

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Old 01-22-2018, 08:54 AM   #2 (permalink)
holmestransfer
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Sounds like a possible bad NOX sensor... BS that the dealer doesn’t know what it means... they’ve got the equipment to diagnose it. Should still be under warranty if the truck is still completely stock. Find a new dealer if your current one doesn’t wanna play ball...


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Old 01-22-2018, 09:15 AM   #3 (permalink)
G2GBY
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Quote:
Originally Posted by ataboy View Post
Got this message Friday on my 2015 GMC. Check engine light and service emission system came on. Dealer doesn't know what it means either? Truck has 66,000 miles on it so I would imagine no warranty left? The dealer did do a recall on it for the def tank heater about 2,000 miles ago.
Have you ever read your Owners Manual?
See “Service Emission System” in Diesel Exhaust Fluid on page 9-13.
https://my.chevrolet.com/content/dam...sel-Manual.pdf
So what code did your dealer come up with?

Last edited by G2GBY; 01-22-2018 at 09:37 AM.
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Old 01-22-2018, 09:37 AM   #4 (permalink)
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Find a new dealer. I had to find a chevy truck dealer. I had the same problem. The Chevy dealer I bought my truck from didn't have a clue about diesels or have any diesel Techs. I found this out after I ordered and took delivery of my dually that they rarely sold any diesel trucks let alone a dually. I could see the techs have never driven a dually and they were afraid to drive it. After a little research I found Chevy Truck dealer that has a contract with the county to work on all their diesel trucks and buses. They have dedicated diesel techs on hand and I never had an issue since.
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Old 01-22-2018, 11:24 AM   #5 (permalink)
ataboy
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Thanks guys, they say there is no code. I wonder if they did something when they did the recall on the def tank? The truck is all stock still so sounds like the warranty is the same as the motor 100,000?
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Old 01-22-2018, 03:03 PM   #6 (permalink)
davester
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If the check engine and service emissions system came on, there is (or was) a code. It's a tossup as to whether they even hooked a scanner to your truck or did hook it up, and just cleared the code, or looked at the code and decided they didn't really want to work on it, and then cleared the code.
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Old 01-22-2018, 04:55 PM   #7 (permalink)
LBZjunkie
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The only good news for you is you can usually find another dealer pretty easy.
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Old 01-22-2018, 07:40 PM   #8 (permalink)
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What dealer did you take it to?
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Old 01-23-2018, 11:35 AM   #9 (permalink)
ataboy
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Dealer in Brookings SD. Picked it up yesterday all they did was clear the message and said try it. Put around 150 miles so far on it. They did add 2.5 gal of def. I still wonder if they didn't hook something up right when they did the def tank heater recall? I am guessing I put on around 2500 miles on it after the recall was done and the def level still said OK. I did see in the manual that the emission system can detect a problem and then correct it sometimes? Also the truck was in regen when I had the message come on.
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Old 01-23-2018, 12:05 PM   #10 (permalink)
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DEF probably froze,,


can every buddy please put in a ''city/state'' so we can help you

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