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Chevy Duramax DEF issues

dave17352
Explorer
Explorer
I have been following a thread recently on duramaxforum.com which is following people that have had DEF problems with their 2011 and newer chevy duramax trucks. I happen to be one of them. My truck is in the shop for the second time, first time they replaced the NOX sensor. 300 miles later it is back in for DEF issues and I won't know something til next week. I was wondering how wide spread it was because it is a 36 page thread and growing on duramaxforum. I would like to hear from anyone on here that has the DEF version Duramax and whether or not you have had any problems.

I was thinking maybe we could post here what your year your DEF duramax is and whether you have had problems or not, and the mileage of such problems or hopefully the mileage of trucks with no problems.

I am trying to figure out if I should keep this truck or not.

Thanks

I absolutely love this truck except when it breaks down!


2011 duramax 24k CEL NOX sensor replaced

300 miles later back in shop for DEF issue
NOW 2017 Leprechaun 260ds
2005 Forrest River Cardinal 29rkle FW
1998 Lance 980 11'3" TC
2017 CHEVY 3500 SRW 6.0
B@W turnover ball @ companion Hitch
Honda eu3000 generator mounted on cargo rack
Crestliner 1850 Fish Ski boat mostly fishing now!
72 REPLIES 72

ricatic
Explorer
Explorer
Both Ford and GM had a lot of trouble in the early 2011 model year. Teething problems plagued both manufacturers. Ford issued numerous programming updates trying to solve their DEF related issues...Troy knows this but still bashes GM...the Ford problem was a cold weather issue...

GM also had cold weather issues..and some problematic DEF tank and pumps in 2011.GM had enough trouble at first that they received an emissions exemption from the EPA to disable the system temporarily until a fix was developed. 2012 and up model years for both manufacturers have been relatively free from DEF related issues.

Regards
Ricatic
Debbie and Savannah the Wonderdachsund
2009 Big Horn 3055RL
2006 Chevrolet Silverado 3500 Dually LTX with the Gold Standard LBZ Engine and Allison Transmission
2011 F350 Lariat SRW CC SB 4WD 6.7 Diesel POS Gone Bye Bye

sayoung
Explorer
Explorer
MARK VANDERBENT wrote:
Wow !!lots of responses with no issues and only a few with slight. Lots of happy duramax owners out there!! I know that for fact !!

No issues on my 12.we have a little over 12k in just 15 months.
Never used any def except the stuff at Walmart

MARK_VANDERBENT
Explorer
Explorer
Wow !!lots of responses with no issues and only a few with slight. Lots of happy duramax owners out there!! I know that for fact !!

nevadanick
Explorer
Explorer
I have a 2011 and had def issue at day 6 of owning truck. Dlr replaced tank and i now have 65k miles with no def issues other than it doesnt give a warning until about 300 mi

NHIrish
Explorer
Explorer
2011 Duramax 3500...32,000 miles and no issues other than low def warning usually appears at 600 +/- miles rather than the 1000 mile mark.
2016 Heartland Bighorn 3270RS

2010 Carriage Cameo 32-FwS
2008 Carriage Cameo
2006 Keystone Cougar
2005 Keystone Zeppelin
1999 Coachmen Catalina

2017 Ford F350 Powerstroke
Curt Q25

Diplomacy is the art of saying 'Nice doggie' until you can find a rock
:W

NJRVer
Explorer
Explorer
Passin Thru wrote:
I'm going with Toyotas. My Chevy is a hangar queen as well and Chevy makes me pay the dealer and then won't reimburse me because we bought the truck in Vermont and are now in Va. My wife has had 6 Toyotas and we have never had any real problems with them, just the sales people in their shops who say things to my wife like at 40K mi, "You need to change your muffler, it's rusting." "You need new Mcpherson struts"



Didn't know Toyota made a 1 ton diesel for sale in the US.:R

esfd243
Explorer
Explorer
2012 with 29k, runs perfect!
Mike, Dawn & Mallori
2016 Hemisphere 368RLBH
2012 Chevy 2500 HD D/A 3.73

smithrjd
Explorer
Explorer
2011 3500HD 20K miles no DEF issues. 2014 2500HD only 1500 miles, but no DEF issues.

Bigfoot_affair
Nomad II
Nomad II
2012 Silverado 3500, 22500 miles and 0 issues...

Passin_Thru
Explorer
Explorer
I'm going with Toyotas. My Chevy is a hangar queen as well and Chevy makes me pay the dealer and then won't reimburse me because we bought the truck in Vermont and are now in Va. My wife has had 6 Toyotas and we have never had any real problems with them, just the sales people in their shops who say things to my wife like at 40K mi, "You need to change your muffler, it's rusting." "You need new Mcpherson struts"

TugCE
Explorer
Explorer
I was just talking to my buddy about this. He and his wife Full Time and have a Carriage Cameo Fifth Wheel and have put over 44,000 miles on their 2012 Chevy 3500 Dually in less than 2 years. I was asking him if he has had any problems and he said None at all. The truck has never been in for anything but normal maintenance.
I am a Retired U.S. Merchant Marine Chief Engineer
05 Chevy 2500 4x4 D/A with Helper Springs and Air Ride Air Bags
(06 R-Vision RW3360 Fifth Wheel Toy Hauler) - Totaled by Irma 2017
97 FLTCI converted into a Roadsmith Trike by The Trike Shop of Daytona

ron64gc
Explorer
Explorer
2011 Duramax 11500 miles. Bad Def CEL. Replaced Nox sensor 2. Fluid checked good. No more problems so far.

greende
Explorer
Explorer
2011 3500 with 8000 miles. No DEF issues...yet.
2011 Chevy 3500 HD LTZ Duramax/Allison Crew Cab Long Box DRW
B&W Turnover Ball with Companion

2012 Keystone Cougar 293 SAB 5er

USAF 1968 - 1972 Viet Nam '71 - '72

FranknDiane
Explorer
Explorer
2012 w/16,000miles...no DEF issues
Frank, Diane, Tyler (our teenager) & Duke (the cat)
2012 Chevy 3500HD Duramax,Crew Cab, 4x4,DRW
2013 Voltage 3600
2000 Harley Electra Glide Classic

CWSWine
Explorer
Explorer
Had my def low light come on and filled it with DEF from AutoZone. Light didn't go out and got reduced power message came on and a engine light. Brought to the dealer he replaced a heated line that injects the DEF.

From the repair ticket:
Preformed Diagnostics, Code P242B EGT Sensor 3, P20BF, Reductant HEATER 2, Traced to problem in reduction fluid injector supply pipe, A DDED .3 for diag time.
Miles in 5521
Model 2500HD
Year 2013
2017 Discovery XLE 40 D DP
Sold Grand Design Solitude 310GK-R
Sold 2016 GMC Denali 1 ton Diesel 3722 CC
5er 13,600 - 3100 pin - Truck Weight 11380 Truck GVWR 11,500
Only 180 lbs below my trucks MAX GVWR