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My 1999 Denali has an intermittent starting problem that I
My 1999 Denali has an intermittent starting problem that I was trying to correct with the 30 minute anti-theft reset procedure but the telltale does not turn off after 10 or even 20 minutes...any sugg… read more
JFN1
JFN1
ASE Certified Technician
Vocational, Technical or Trade Scho
270 satisfied customers
I'm working on a 95 GMC Yukon. The question I have is about
I'm working on a 95 GMC Yukon. The question I have is about the ecm. Can I change ecms and eeproms at free will without setting off any kind of security lockout ?… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,822 satisfied customers
Have a 2002 sierra 2500 6 litre it has sat year inside and
have a 2002 sierra 2500 6 litre it has sat for a year inside and after changing out the battery it cranks but does not start ,,,no codes have appeared… read more
Jared D
Jared D
Shop Supervisor
Bachelor's
3 satisfied customers
CENTER INTAKE MANIFOLD FROM 03 LB7 WITH CALI EMISSIONS AND
IM REMOVING CENTER INTAKE MANIFOLD FROM 03 LB7 WITH CALI EMISSIONS AND THE FUEL PRESSURE RELIEF IS IN THE WAY DO I JUST UNDO THE BANJO BOLT? IM NOT SURE WHAT DO U ADVISE… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
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2011 GMC duramax diesel - we are a german car repair shop -
2011 GMC duramax diesel - we are a german car repair shop - I'm the owner - my truck started having intermittent misfire with no check engine for about 1 week ( 300 miles of city and highway driving) … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
626 satisfied customers
2003 GMC Sierra 2500 HD 6.0 v8 I have a truck getting very
2003 GMC Sierra 2500 HD 6.0 v8 I have a truck getting very poor fuel economy. The truck has numerous codes with p0154, p0171B, p0174B, P0300B, p0327, p0332. As far as the knock sensors go, I am gettin… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
1,323 satisfied customers
GMC Sierra: 2003 GMC Sierra 2500HD (4WD) 6.0 Liter Vortec -
2003 GMC Sierra 2500HD (4WD) 6.0 Liter Vortec - Truck started running rough over the winter. Have had a P300 code for a while and ignored (I know...I know). This spring, the truck started stumbling ba… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,588 satisfied customers
GMC Sierra 1500: i have a 1997 gmc sierra 5.7l 1500 i just
i have a 1997 gmc sierra 5.7l 1500 i just changed sparkplug i was just doing that cause its been quite a while since they have been changed so i changed them and before the truck started and ran great… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,588 satisfied customers
GM Yukon XL: Hi, My 2003 Yukon xl was parked on a steep bank
Hi, My 2003 Yukon xl was parked on a steep bank (maybe 25-30 degree slope) and in idle when it stalled after sitting there a couple minutes. Gas had been near empty but not in danger of running out. W… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
gmc sierra 1500: I have problems starting my 1997 gmc sierra
I have problems starting my 1997 gmc sierra 1500 2wd with a 5.7L v8. If I let it sit for at least 45 minutes or so, there is no problem starting it. The problem comes when I drive around and make one … read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC Yukon Denali: Hi: My 2003 Denali sat (unfortunately
Hi: My 2003 Denali sat (unfortunately ) for approximately 2+ years (maybe 2 years, 3 months) without moving. It was recently towed (flatbed) and then towed again to a mechanic my father (not me) has b… read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
8,789 satisfied customers
GMC C4500: I have a 2003 GMC 4500 with an LB7 Duramax and Allison
I have a 2003 GMC 4500 with an LB7 Duramax and Allison Trans. It has had reman injectors in the last month. It smokes seriously at idle and emits horrible fumes. It has done this for approximately 1 y… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
GMC Sierra: My 96 GMC Sierra died in the middle of the road.
My 96 GMC Sierra died in the middle of the road. After towing it home, I tried starting it and got nothing. I will crank but will not start. The next day, I fired it up and it started but the idle was… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC: The steering wheel will not lock into place, and we cannot
The steering wheel will not lock into place, and we cannot get the truck to start. Any suggestions… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
1,323 satisfied customers
GMC C3500 Sierra XC 4x2: 1995 gmc 3500 SE has alarm system
1995 gmc 3500 SE has alarm system built in by GM. Truck has sat for 2.5 years. Widow wants to sell it. Battery has died. When charged battery is connected, alarm is triggered when attempting to start.… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,588 satisfied customers
GMC Sierra Denali Classic: I have a 2003 GMC Sierra Denali
I have a 2003 GMC Sierra Denali pickup truck with only 62K miles that won't crank. No clicking sound. Nothing. However, all of the lights come on. The remote lock works fine, and the horn and running … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,588 satisfied customers
GMC Sierra 2500 HD SLE: 2002 lb7-148,000miles-When I release
2002 lb7-148,000miles-When I release accelerator or cruise control above 50 mph it momentarily revs and clatters. Within the last couple of months the normal idle temp has gone to @ 180 instead of @ 2… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,822 satisfied customers
GMC Suburban K1500 4x4: This question is regarding a 1999 GMC
This question is regarding a 1999 GMC Suburbank K1500 that is cranking rapidly, sputtering, but will not start. Engine has been well maintained, and has 230,000 miles. This truck just completed a 150 … 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

1,822 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,588 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

626 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

279 satisfied customers

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

JFN1

JFN1

ASE Certified Technician

270 satisfied customers

GM Master Technician

George H.

George H.

ASE MasterTechnician

228 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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