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2016 gmc Sierra 6.6 diesel. Truck consistently throws code
2016 gmc Sierra 6.6 diesel. Truck consistently throws code p0420 and now has p2463. Looking for repair solutions. Cause and correction ect. Have you seen this malfunction? Acquired snapshot data last … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
31,875 satisfied customers
I have a 2014 GMC Savana 3500 6.6L Diesel Duramax. I had a
I have a 2014 GMC Savana 3500 6.6L Diesel Duramax. I had a couple of DTC's P0420 and P2463. I removed both cat and DPF filter to get cleaned and they reported DPF had little to no flow. I replaced DPF… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
8,968 satisfied customers
2016 gmc duramax. Truck has been for the most part problem
2016 gmc duramax. Truck has been for the most part problem free. Lately truck has been throwing the code p0420 for cat efficiency. Please advise with solution set and repair experience. Thanks. Feel f… read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
22,408 satisfied customers
P01F0 error how do I clear it to see if the thermostat is
P01F0 error how do I clear it to see if the thermostat is the problem. My def tank was low when this error came up. … read more
Andrew
Andrew
Master Diagnostic Technician
Associate of Occupational in Automotive Technology
539 satisfied customers
I have a 2015 Sierra 3500HD SLT. The reverse lights and
Hello. I have a 2015 Sierra 3500HD SLT. The reverse lights and backup camera are not working. After various troubleshooting steps, I checked fuses 16 and 33 with a multimeter and neither are receiving… read more
Amedee
Amedee
Automotive Consultant
Vocational, Technical or Trade Scho
22,294 satisfied customers
2013 gmc sierra 6.6 diesel. Truck has condition where dpf
2013 gmc sierra 6.6 diesel. Truck has condition where dpf will start with about 12g soot mass and in about a week will have about 80 g soot mass and engine will derate. A stationary regen seems to cor… read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
863 satisfied customers
2011 6.6 has code 2463 as well as 2454 / im performong a
2011 6.6 has code 2463 as well as 2454 / im performong a passive regen now im about 40 min. into it the engine light is on temps are over 1000 degrees any thoughts on issue will the regen do it or am … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
31,875 satisfied customers
I have a 2001 Yukon with manual HVAC. The mode actuator
I have a 2001 Yukon with manual HVAC. The mode actuator started "hunting" and making noise like water boiling in the next room. Help … read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
1,610 satisfied customers
Cam, 2005 gmc 2500 6.6 has code p1093 fuel rail pressure low
hello cam, 2005 gmc 2500 6.6 has code p1093 fuel rail pressure low when enrichment requested. symtoms are loss of power engine will not go above 2k rpm any thoughts?… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
31,875 satisfied customers
I have a 2015 Gmc duramax washed the filter cleared the
Hi i have a 2015 Gmc duramax washed the filter cleared the codes less than a minute of driving check engine light comes on and truck goes right down to half power code P2463 comes up first and then af… read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
863 satisfied customers
3500 2001. Its a tad complicated...you or him? 2001 gmc
its a tad complicated...you or him? 2001 gmc sierra 3500 dually RWD ... power loss...Guys - '01 3500 Sierra Dually RWD 6.6L Duramax, w/ Allison. Cruising flat highways and on ramp speed up are no issues. However, up hill (whether towing or not) and kicking down the tranny to lower gear the following happens: dash lights, radio, seemingly the ignition circuit and a loss of power occurs after about 10-20 seconds after starting the hill. Only solution is to remove foot off accelerator and everything comes back on and carries on. To take the hill I must stay around 50 MPH, to avoid tranny shifting? This is a ground issue, isnt it? Is it possible that the tranny and the dash (and/or ignition circuit) are all grounded to the same hard point, that is faulty, perhaps?!? any idea what may be causing this kind of power loss? and gas pedal or tranny/ dash shutdown combination?… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
8,968 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
41,590 satisfied customers
I have an 02 GMC Sierra 1500 5.3L V8 with a check engine
I have an 02 GMC Sierra 1500 5.3L V8 with a check engine light. I have Codes: PO449-PO420-PO440. I have replaced the Vapor Canister Purge Valve Solenoid and the Vapor Canister. What else can I do to t… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
8,968 satisfied customers
2002 GMC 3500 HD turbo diesel no power codes p1216 and pro
2002 GMC 3500 HD turbo diesel no power codes p1216 and pro 251 it has had a fuel mod put on about a yr ago its mounted on the fender any help would be great… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
35,193 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
1,610 satisfied customers
gmc sierra: 2002 durmax 6.6 chevy replace fuel pump still wont
2002 durmax 6.6 chevy replace fuel pump still wont crank. first changed fuel filter and started drove 10 miles died wont crank still… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
31,875 satisfied customers
GM k3500 obs: , I have a problem with my blend door actuator.
, I have a problem with my blend door actuator. I replaced the heat and a/c control unit and the controls all worked yesterday. today i was driving down the road. and the heater defaulted to only blow… read more
JFN1
JFN1
ASE Certified Technician
Vocational, Technical or Trade Scho
272 satisfied customers
GMC Yukon slt: 2007 gmc Yukon slt and my rear gate door will
2007 gmc Yukon slt and my rear gate door will not open with remote or by handle, only manually I can open but not powered. My front power gate switch is on and when I press remote button to open my ta… read more
John
John
MASTER AUTOMOTIVE TECHNICIAN
2 YEARS COLLEGE
9,106 satisfied customers
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Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

31,875 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

863 satisfied customers

24 years of experience diagnosing & repairing

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

Don - Mo Lurch

Don - Mo Lurch

ASE Certified Technician

264 satisfied customers

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

Mike S.

Mike S.

ASE Certified Technician

247 satisfied customers

GMC N.A.I.S.E. Certified Auto-Mechanic

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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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