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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
272 satisfied customers
My key is stuck in ignition. Can't turn wheel key is good.
My key is stuck in ignition JA: Can you turn the steering wheel at all? And what about the key? Is it worn or damaged? Customer: Can't turn wheel key is good JA: What is the model/year of your GMC? Cu… read more
JFN1
JFN1
ASE Certified Technician
Vocational, Technical or Trade Scho
272 satisfied customers
I disconnected the battery on my 2008 GMC Yukon. Now the
I disconnected the battery on my 2008 GMC Yukon. Now the truck won't start. The electronics come on but I get nothing when I try to start the engine. Is there some sort of anti-theft system that is pr… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
6,498 satisfied customers
Was trying to reset a new remote and origanal remote for my
was trying to reset a new remote and origanal remote for my yukon and now it won't start. Seem to be locked. … read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
10,851 satisfied customers
I stepped on my break 3 times in my gmc 2008 Yukon Denali
i stepped on my break 3 times in my gmc 2008 Yukon Denali and now my anti theft system won't allow my truck to start … read more
david carrier
david carrier
86 satisfied customers
Can't get it to start. New battery. All electrics are good.
Can't get it to start. New battery. All electrics are good. Suspect anti theft logic is not letting car start. Seat heaters do on work. Checked ign.3 fuse and it was good. … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,823 satisfied customers
Anti theft keeps going off every 5 minutes, 2015 gmc Yukon
no, getting 14.5 on the meter. no corrosion on the terminals … read more
BOBBYSS
BOBBYSS
Automotive Repair/Damage Investigator
Associate Degree
14,570 satisfied customers
Envoy died while driving - lost power - dash lights were
Envoy died while driving - lost power - dash lights were flashing. Stopped - no crank start in neutral. Put it in park, and theft lock light lights up - no crank start. Cannot shift either … read more
Tim Mohr
Tim Mohr
SHOP OWNER
Master's Degree
16,172 satisfied customers
My husband changed the battery and now the anti theft system
My husband changed the battery and now the anti theft system won't allow it to start 2003 Yukon Denali... it was bought used and no original keys … read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
10,851 satisfied customers
04 yukon wont start, padlock symbol comes on. how do i get
04 yukon wont start, padlock symbol comes on. how do i get it out of this mode? … read more
Tim\u0027s Auto Repair
Tim\u0027s Auto Repair
Mechanic
High School or GED
14,662 satisfied customers
GMC C3500 HD: 2008 GMC 3500 HD anti theft wont reset. I have;
2008 GMC 3500 HD anti theft won't reset. I have; tried 1) key out, key in, 2) ignition on, 3) Key to start position, then release and wait 10 minutes. 4) Key to off position for 5 seconds and repeated… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
29,945 satisfied customers
GMC Tahoe: if the anti theft system cant be reset with one
if the anti theft system can't be reset with one key is it possible that spare key will start the truck? tried the 3 cycle reset process and still stalls. Don't have scan tool to clear codes.… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
18,051 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 Yukon XL 1500 Denali: My 2004 GMC Yukon Denali wont start.
My 2004 GMC Yukon Denali won't start. It has gas. Starter is working fine. It's cranking, but won't turnover. My initial thought was fuel pump. any suggestions for determining a diagnosis?… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
23,904 satisfied customers
GMC Yukon Denali: have 2003 yukon denali and replaced ignition
have 2003 yukon denali and replaced ignition switch suspected of failing and draining battery. reassembled and now have power to all systems however no crank or start? Must be something to do with ant… read more
Hal
Hal
owner/service tech
Vocational, Technical or Trade Scho
925 satisfied customers
GM Yukon: i just replaced the ignition switch in my 2003 gmc
i just replaced the ignition switch in my 2003 gmc yukon denali. The theft system in not allowing it to remain running. what can i do other than taking it to a GM dealer… read more
George H.
George H.
ASE MasterTechnician
Associate Degree
230 satisfied customers
GM Yukon XL: I have a 2003 Yukon XL and the Service Brake Booster
I have a 2003 Yukon XL and the Service Brake Booster message warning just started flashing after start up. Oddly enough, the Battery not Charging warning started coming up (with the battery light) abo… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GM Canyon: how do i override the anti theft. its getting plently
how do i override the anti theft. it's getting plently of fuel, just won't start. Has happened before about 3 years ago, can't remember what i did.… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
23,904 satisfied customers
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Meet the Experts:

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

18,051 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

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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