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2003 GMC Sierra 2500hd Duramax, automatic transmission. Was
2003 GMC Sierra 2500hd Duramax, automatic transmission. Was speeding up and heard a slight "pop/thud noise" and felt a bit of a jerk. There appeared to be some black smoke from the exhaust at the same… read more
Chris (aka-Moose)
Chris (aka-Moose)
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Vocational, Technical or Trade School
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Traction control light keep flashing. Message says
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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
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I have a gmc sierra 3500 diesel and this morning it was 10
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No power. Barely revs up, It's constant, 2004 gmc xuv. 4.2,
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2000 gmc sierra. noticed on accident that while holding the
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Need help with codes P0300 and C0035. Engine has a heavy
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I am getting a P0122 and P0300 code in a 2001 Gmc Sierra
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I have a 2001 GMC Yukon Denali and this morning it began
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GMC Sierra: service soon light is flashing. engine running
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Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,823 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

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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

675 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

285 satisfied customers

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

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

George H.

George H.

ASE MasterTechnician

230 satisfied customers

15+ Years ASE Master Technician with Level 1 Certification

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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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