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My husband's def system is saying that it is low. But the
My husband's def system is saying that it is low. But the resivior is full … read more
Roy
Roy
shop foreman
Associate Degree
4,589 satisfied customers
On 24 APR I received a response from you rgdg P0420 & P2463
On 24 APR I received a response from you rgdg P0420 & P2463 codes on my 2011 Sierra 3500 6.6 Duramax. I checked for exausted leaks, found None. I check IN & OUT Temps of Catalytic converter, RPM 2200 … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
705 satisfied customers
2011 GMC 3500HD 6.6 LML DURAMAX (Stock, no mods). Code P0420
2011 GMC 3500HD 6.6 LML DURAMAX (Stock, no mods).Code P0420 - Catalyst System Efficiency below Threshold Bank 1. Code P2463 - Particulate Filter restriction - soot accumulation. Upon starting DIC Msg … read more
Eric
Eric
Retired
N/A
33,930 satisfied customers
GMC 2015 Duramax LML V8 6.6L - DIC message SERVICE EXHAUST
GMC 2015 Duramax LML V8 6.6L - DIC message SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW -TRANSITIONING TO 7 KM/H(4 MPH) MAX SPEED displays. A flashing warning light and a chime also come on. V… read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
1,571 satisfied customers
Cam, im getting a p0406. I installed a new egr valve but
Hey cam, im getting a p0406. I installed a new egr valve but code is still there. Gives message "engine power is reduced"… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
6,147 satisfied customers
I spend a lot of time on the road. i am retired. i usedto
I spend a lot of time on the road. i am retired. i usedto design and build 12V and 24V control systems. This winter my DEF started giving me strange readings. the tank was at 14% and it took maybe 1 g… read more
Roy
Roy
shop foreman
Associate Degree
4,589 satisfied customers
I have a 2011 duramax with 200k miles. It won't start when
I have a 2011 duramax with 200k miles. It won't start when the engine is hot. Starts fine cold and also will start with a little starting fluid when it's hot. What does the rail pressure have to be in… read more
Juan Crespo
Juan Crespo
Sr. Technician
Bachelor's Degree
1,262 satisfied customers
Need to know if the ecm in this duramax diesel 6.6 2006 is
need to know if the ecm in this duramax diesel 6.6 2006 is correct .It had a bosch 12606127 the new one is(###) ###-#### … read more
Eric
Eric
Retired
N/A
33,930 satisfied customers
Pete. we are a mechanic shop. we have replced intake with a
hi pete. we are a mechanic shop. we have replced intake with a afe system. the reduce power code was saying mass air flow sensor. weve replaced that 3 times and if still only reduces power in the rain… read more
Pete
Pete
GMC Mechanic
General auto certifications
35,188 satisfied customers
My name is brent i have a 2008 gmc 2500 duramax with
hello my name is ***** ***** have a 2008 gmc 2500 duramax with recurring codes #p2463 high soot acumilation but the pressure difference is only .03 .also have codes p244b and p0299.00 thinking ecm nee… read more
Derek Werner
Derek Werner
Diagnostic Technician, Shop Foreman
Vocational, Technical or Trade School
142 satisfied customers
2004 gmc topkick 6.6 duramax We have 4 injectors apparently
2004 gmc topkick 6.6 duramax We have 4 injectors apparently not firing. I ran a cylinder cutout because the truck had a bad mis and cylinders 2,3,5,8 are not firing as they did not change the sound or… read more
Pete
Pete
GMC Mechanic
General auto certifications
35,188 satisfied customers
GMC C5500: I have a 2007 GMC C5500 (Topkick) with the duramax.
I have a 2007 GMC C5500 (Topkick) with the duramax. DTC P0101 comes up on idle. Replaced the MAF sensor but the code still comes up at idle along with the engine derate. As soon as I start driving, th… read more
Pete
Pete
GMC Mechanic
General auto certifications
35,188 satisfied customers
GMC 2500 Series: 2008 GMC DURAMAX is displaying to clean exhaust
2008 GMC DURAMAX is displaying to clean exhaust filter ok i got home and notice the exhaust pipe under the truck way too hot is it normal to be this hot to the point where smoke is being produced? the… read more
Mike Kelly
Mike Kelly
Auto Mechanic
Vocational, Technical or Trade Scho
2,460 satisfied customers
GMC 2500 HD duramax: Engine power reduced in 2008 duramax.
Engine power reduced in 2008 duramax. Says clean exhaust and see manual. Can't find the manual. Is there a quick fix or does it need to go in?… read more
Randall C
Randall C
Auto Technician / Consultant
Vocational, Technical or Trade Scho
12,799 satisfied customers
GMC silverado: My 2010 GMC runs bad. Dash says,"Engine power
My 2010 GMC runs bad. Dash says,"Engine power reduced", malfuction light is on, clean exhaust filter.HOW AND WHERE?!!!!… read more
Don - Mo Lurch
Don - Mo Lurch
ASE Certified Technician
Vocational, Technical or Trade Scho
234 satisfied customers
i have a 2002 gmc duramax lb7 setting dtc p0101 code at idle.
i have a 2002 gmc duramax lb7 setting dtc p0101 code at idle. engine is all stock. scan tool readings are as follows, engine speed 681,maf 5.3 hg, all elecricial consumers off. load 18.4,map 28.9 car … read more
Mark
Mark
Line Technician
Associate Degree
799 satisfied customers
GMC: Please help. I have a 2002 Duramax which only will rev
Please help. I have a 2002 Duramax which only will rev out to m about 2200 rpm. NO DTC's. The vehicle came in this problem. We found injector balancing rates were high. Replaced all injectors and stil… read more
Hal
Hal
owner/service tech
Vocational, Technical or Trade Scho
925 satisfied customers
GMC 2500hd serria: I have a 2500hd duramax and my exhaust filter
I have a 2500hd duramax and my exhaust filter clean and reduced engine power warning light keeps coming on what can i do to fix it… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
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Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,837 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,589 satisfied customers

GCM master tech over 25 years

Dave Nova

Dave Nova

GMC Technician

929 satisfied customers

ASE Master Certification. GM World Class Certification

Chris (aka-Moose)

Chris (aka-Moose)

GMC Technician

705 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

291 satisfied customers

18+yrs experience. State Inspector & GMC Diagnostics/Repair

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

Don - Mo Lurch

Don - Mo Lurch

ASE Certified Technician

234 satisfied customers

GM, GMC, Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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