GMC

GMC Troubleshooting Questions? Ask a Mechanic for Answers

Ask an Expert,
Get an Answer ASAP!

GMC
This answer was rated:

My 02 heater and EVAP monitors will not run complete for

inspection would a air bag...
My 02 heater and EVAP monitors will not run complete for inspection would a air bag light on the dash stop this from completing?
JA: Have you noticed a rough idle? Has there been any leaking?
Customer: no leaks, idles great no check engine light
JA: What is the model of your '02 GM?
Customer: 2005 GMC Yukon Denali, 6.0 engine
JA: Are you fixing your Yukon Denali yourself? What have you tried so far?
Customer: Yes doing myself, ghanged gas cap, changed the Purge valve solenoid vent, filled the fuel tank, followed the drive cycle a few times as close as I can
JA: Anything else you want the mechanic to know before I connect you?
Customer: my air bag light is on because one of my impact sensors is bad.
Show More
Show Less
Ask Your Own GMC Question
Answered in 27 minutes by:
12/14/2017
Eric
Eric, Automotive Repair Shop Manager
Category: GMC
Satisfied Customers: 33,170
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified

HI,

Ok, are there any current or pending codes in the ECM?

Ask Your Own GMC Question
Customer reply replied 1 month ago
no codes at all

HI,

Ok, first, the airbag light does not prevent the monitors from setting to readiness.

I have found the most success doing the GM drive cycle with the vehicle on a lift. You can put it up on blocks or jackstands. This allows you to perform the drive cycle exactly as stated with no deviations. Just make sure it has 3/4 of a tank and sets for at least 8 hrs before doing the drive cycle

General Motors Driving Cycle

A complete driving cycle should perform diagnostics on all systems. A complete driving cycle can be done in under fifteen minutes.

To perform an OBDII Driving cycle do the following:

Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 50°C (122°F) and within 6°C (11°F) of the ambient air temperature at startup. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.
Idle. The engine must be run for two and a half minutes with the air conditioner on and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge "No Flow", Misfire and if closed loop is achieved, Fuel Trim.
Accelerate. Turn off the air conditioner and all the other loads and apply half throttle until 88km/hr (55mph) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.
Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.
Decelerate. Let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 32km/hr (20 mph). During this time the EGR, Purge and Fuel Trim diagnostics will be performed.
Accelerate. Accelerate at 3/4 throttle until 88-96 km/hr (55-60mph). This will perform the same diagnostics as in step 3.
Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.
Decelerate. This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes or shift gears.

If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT/3 STARS OR HIGHER today. Please reply and let me know why, so I can help more/better. All follow up responses are FREE, after completing the required rating

Please remember to rate service using the separate rating page. Thank you

Ask Your Own GMC Question
Customer reply replied 1 month ago
This all started when I had a check engine light on for the evap system. I cleared the light and it did not return but I also deleted all the info in my computer so I changed the fuel cap, the Purge valve solenoid vent, filled the fuel tank. I have run the drivers cycle a few times but always on the road. I need these to completely run so I can get my vehicle inspected, my inspection ran out Dec 1st.. I will try this drive cycle on jack stands and will let you know how it turn's out . Hopefully this works I will let you know as soon as possible. Thank you.

HI,

Sounds good and I am here every day

Eric
Eric, Automotive Repair Shop Manager
Category: GMC
Satisfied Customers: 33,170
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified
Eric and 87 other GMC Specialists are ready to help you
Ask your own question now
AMEDEE
AMEDEE, AUTOMOTIVE TECHNICIAN
Category: GMC
Satisfied Customers: 9,105
Verified
Phone call session started
Ask Eric Your Own Question
Eric
Eric
Eric, Automotive Repair Shop Manager
Category: GMC
Satisfied Customers: 33,170
33,170 Satisfied Customers
Experience: 20+ yrs. experience as repair shop manager and technician.

Eric is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,696 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,557 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

583 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

259 satisfied customers

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

George H.

George H.

ASE MasterTechnician

227 satisfied customers

15+ Years ASE Master Technician with Level 1 Certification

Don - Mo Lurch

Don - Mo Lurch

ASE Certified Technician

218 satisfied customers

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

< Previous | Next >

Related GMC Questions
Often stalls when braking. No the check engine light is not
No the check engine light is not on. Truck stalls when braking but starts right back up. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Battery will not charge. new battery and new alternator. The
battery will not charge. new battery and new alternator … read more
Cesar Jimenez
Cesar Jimenez
Owner/CEO
Vocational, Technical or Trade School
84 satisfied customers
I have a brand new battery in but my battery level sits at
I have a brand new battery in but my battery level sits at about 11 on the cluster and won't turn on, if I boost it the truck starts and runs normal but if I turn the truck off the truck immediately w… read more
Mechanic01
Mechanic01
1,645 satisfied customers
My e-brake light won't turn of and I believe the e-brake
My e-brake light won't turn of and I believe the e-brake won't release. The ABS light won't go off either. This just started yesterday.… read more
Todd Audette
Todd Audette
Automotive Technician
Vocational High School
132 satisfied customers
New battery drains overnight. No but the battery is new. The
No but the battery is new. The same thing happened before the battery was replaced. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
I just bought a new battery at autozone and they put it in
I just bought a new battery at autozone and they put it in but the next day when I tried to put 2006 gmc envoy into two wheel drive from auto it just flashes and then moves to four wheel drive high. I… read more
tim37857
tim37857
Mechanic
High School or GED
71 satisfied customers
The abs light and parking brake light came on today and it
good morning the abs light and parking brake light came on today and it won't go off, brakes seem to be fine … read more
Mechanic01
Mechanic01
1,645 satisfied customers
It will Not start. We tried a new battery- its not the
We tried a new battery- its not the battery, nothing is corroded … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,375 satisfied customers
Is it normal for a car battery voltage increase after trying
Is it normal for a car battery voltage increase after trying to unsuccessfully start the car and then letting it sit for several moments?… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,557 satisfied customers
Battery fully charged but when the remote is in proximity
battery fully charged but when the remote is in proximity and brake is depressed nothing happens … read more
GM Bob
GM Bob
Automobile Technician
High School or GED
1,002 satisfied customers
Coolant leaking around right bank second from front
Coolant leaking around right bank second from front injector, we pulled the injector and we see coolant at the bottom of the hole, please advise? … read more
TIM MOHR
TIM MOHR
SHOP OWNER
Master's Degree
8,037 satisfied customers
Remote start won't work-changed batteries in remotes and
remote start won't work-changed batteries in remotes and still no luck … read more
GM Bob
GM Bob
Automobile Technician
High School or GED
1,002 satisfied customers
Idle engine. 285000 VVM envoy 2003 XL. Also battery not
This just happened todayhvnt had a chance to do anything as yet… read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
583 satisfied customers
Battery saver light came on. Battery test with the engine
Battery saver light came on. Battery test with the engine off at 12.7 VDC, With the engine running at an idle 15.7 VDC. Trying to locate the issue … read more
Mechanic01
Mechanic01
1,645 satisfied customers
Battery is dead all of a sudden. symble on dash = Battery
battery is dead all of a sudden. symble on dash = Battery malfunction It's a 2013 Acadia … read more
AZTechBrian
AZTechBrian
ASE Certified Technician & Shop Owner
Vocational, Technical or Trade School
732 satisfied customers
I have a 2011 diesel 6.6 it's wasting coolant and the oil
I have a 2011 diesel 6.6 it's wasting coolant and the oil seems with water, also the pression coolant reservoir is black and oily. can you tel me if the problem is in the heads or in the engine block?… read more
Eric
Eric
Automotive Repair Shop Manager
33,170 satisfied customers
Battery light was on this am but alt is charging. Battery
Battery light was on this am but alt is charging. Battery was dead but is 6 years old. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
2006 GMC savana 3500 6.6 low coolant light res was replaced
2006 GMC savana 3500 6.6 low coolant light res was replaced varified sensor open and closes replaces connector (broken wire) check resisdence on ground good and green wire to pcm replaced pcm and flas… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
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.

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.

Show MoreShow Less

Ask Your Question

x