GM

GM repair problems? Ask a GM repair expert now.

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

I have a 2007 Yukon Denali, we had a snow storm last week.

I have a 2007...

I have a 2007 Yukon Denali, we had a snow storm last week . While on my way home from work (5-6 inches of snow) my TCS and Stabiltrack starting to go off

Mechanic's Assistant: Will the headlights turn on? Is the battery fully charged?

Yes I was driving while it happened, battery was near 14 volts

Mechanic's Assistant: Are you fixing your Yukon Denali yourself? What have you tried so far?

Change the plugs, wires, and coils

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

When i had the truck looked at read misfire in Cylinder 7 yes, I had a slight rough idle in my veicle prior, not a misfire, but you could look at the block and notice the vibration within ther engine

Show More
Show Less
Ask Your Own GM Question
Answered in 1 minute by:
3/10/2018
Jerry Newton
Jerry Newton, GMC Technician
Category: GM
Satisfied Customers: 5,628
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
Verified

Is the truck still acting up, is the engine still misfiring?

Ask Your Own GM Question
Customer reply replied 1 month ago
Once the code was cleared the truck is running as it previously did. Still have that rough idle that I previously had
Customer reply replied 1 month ago
I bought a TPS , but did not put it on. I also notice my cruise control doesn't work at all, not sure it that helped, but i figured mention it
Customer reply replied 1 month ago
Misfire Cylinder 7 is the code the Scanner read.

The Stabilitrak system won't work if there is an active misfire, because this would damage the catalyst in the exhaust.

New plugs, wires, and coils, and it's still misfiring, yes? Compression testing and leak down testing would be next, and if those things are OK, I would swap injector #7 with injector #5 (they're next to each other) and see if the misfire follows the injector. These engines have a problem with #7 injector clogging, due to the way the engine slants and the fuel system is designed, if there is any debris that gets past the filter, it tends to settle into injector #7 and clog it up. If the misfire follows the injector, replace it.

Ask Your Own GM Question
Customer reply replied 1 month ago
Its not a hard misfire, but idling I literally watch the tachometer move slightly up and down, and when it doesI feel it in the vehicle. That information was crucial with the injector, I replaced everything and its running the exact same way.
Customer reply replied 1 month ago
I'm assuming damage is too far gone to try any type of injector cleaner?

Will you be able to swap that injector and see if the misfire follows?

The times I've seen #7 injector get clogged up, it's right at the inlet screen of the injector. You can see it when you take it out of the fuel rail, looks like little bits of rust or whatever, just all piled up and restricting fuel flow through the injector. Cleaner wouldn't touch it, nothing will dissolve this stuff. You might tap the injector on the bench and knock it out, but a new injector is what GM tells us to do, so that's what I do.

Ask Your Own GM Question
Customer reply replied 1 month ago
I understand that a fouled injector will cause a misfire, but would the clogged injector cause the rough idle. Also this misfire only happens in stressed environments ex. snow, towing

The clogged injector doesn't completely shut off the fuel, it just leans out that cylinder, so I would see it exactly as you're seeing it at idle: a little bounce in the vehicle, a little twitch in the tach needle, but not really a hard misfire like it's running on 7 cylinders.

Do you have a misfire under load, like when you're towing, too?

Ask Your Own GM Question
Customer reply replied 1 month ago
I appreciative all this great info! Three more questions and I'm done
1. My front right tire TPMS malfunctions in heavy rain. Would you just recommend replacing that one?
2. I have a hard downshift from 2nd to 1st, and a push upshift from 1st and 2nd. 109,543 on the denali now, what will cause the push, almost feels like a gap , similar to a train on the railroad that has slack when it starts and stops.
3. I notice on the highway I have more than usual sway in the steering wheel, Control arms were checked, the rod that about 12" inches long, vertical were replaced ( forgot the name of this part) . I hear a noise (clunk) over speed bumps. The truck is just rough overall over bumps, it doesn't smooth the bumps out like it use too. I was told the shocks were changed , but i bought the truck a little over a year ago and I put about 20,000 highway miles on it. I'm thinking the shocks are worn, but you are the expert.
Customer reply replied 1 month ago
the misfire was under load, I never see it under normal conditions
  1. The TPMS sensor is inside the tire, protected from elements. I've never seen one affected by wet weather. I'd prove this out by rotating the tires, relearning the TPMS sensors, and (like the fuel injector) seeing if the failure follows the sensor.
  2. The difference between 1st and 2nd gear is a clutch release combined with a band apply. It's common for these two things to not happen at the exact same time, giving you that feeling of weirdness as the shift progresses. GM calls it normal, and that you shouldn't even try to fix it, because it depends on too many variables like clutch stack, machining tolerances, etc. What you can do, and what I have done in the past, is install a 2-4 band servo piston out of a Corvette in the transmission. This snaps up that band apply and gives a much more firm feel, though it won't change that timing I was talking about, the band at least won't be lazy on the apply and it will give a "shift kit" sort of feel to the 1-2 shift. Same for the downshift, the timing is causing that feeling, and again, GM says not to try to fix it, it's not detrimental.
  3. 12" long vertical... you must be talking about the intermediate shaft on the steering column. We had huge problems with those, making clunking noises. The telltale on those is that it would rarely clunk when driving perfectly straight. If you turned the wheel to 9:00 or 3:00, it could clunk so bad you'd swear something was falling out of the truck. Tire condition plays a huge role in ride quality. The parallelogram steering is never really as tight as a rack and pinion setup, idler and pitman arms wear out with regularity. If there is an issue with the speed sensitive steering, it will default to full assist, making you feel like you're driving on ice at highway speeds, but this is usually accompanied by an ABS light or message.
Ask Your Own GM Question
Customer reply replied 1 month ago
thank you, ***** ***** from 2 to 1 is more than i think normal. At times I check behind me to make sure no one has bumped me. Just want to make sure I didn't leave any symptoms out. and I will look into that band to get that "firm feeling back".
Customer reply replied 1 month ago
Would you recommend me still changing the shocks on the truck?

Only if they aren't dampening. Depends on what shocks you have there, are they too aggressive? Off road shocks, like Rancho and Skyjacker, are very firm and aggressive. The best shocks I've come across are OEM: AC Delco shock absorbers have the best right quality, and I try to install those any chance I get for a customer.

You can test shocks for wear by just bouncing the front end. Put your knee on the front bumper, and give the truck a few bounces, then let off and watch how many more bounces it does by itself. It should rebound once then stop bouncing. If it cycles more than one time after you stop pushing on it, the shocks are worn out.

Again, tire quality and condition plays a huge role in ride quality.

Ask Your Own GM Question
Customer reply replied 1 month ago
I apologize, I forgot to ask you about the cruise control I mention to the initial rep . My cruise and my seat release button at all. I know its a electrical issue, but with your experience you have any suggestions or heard of this issue before?
Customer reply replied 1 month ago
Thank you, ***** ***** question is my last question I promise lol

Cruise control won't work if you have an active misfire. That's normal. Does the cruise ever work, or does it only stop when you have this misfire happening?

What seat release button are you talking about?

Ask Your Own GM Question
Customer reply replied 1 month ago
Both of them never worked ever

I'm still not clear.... seat release... on the back seats or where?

Ask Your Own GM Question
Customer reply replied 1 month ago
Before I had any misfire, but that injector been clogged awile, its been a process of trying to narrow the solution down thus far
Customer reply replied 1 month ago
the seat release on the back seats, the button in the second row and all the way behind the third row does nothing at all. no noise of attempting to make the release , like the cruise control , no symptoms at all

Rear seat fuse, 20A, is the fuse for those release motors. The only thing that makes sense is the fuse is open or the ground is open, this isn't a system we had a lot of trouble with, frankly. This fuse is in the IP fuse block on the side of the dash. The grounds are separate for each side, so probably not a ground issue. I'd get after that fuse.

Ask Your Own GM Question
Customer reply replied 1 month ago
Thank you, ***** ***** the cruise control not working?

If there is a misfire that's current, it won't work. Otherwise, there are scan tool diagnostics for it. Stoplamp switch failure is common, try putting your foot under the brake pedal and pulling up on it while driving, and engage the cruise. If it works, you need a stoplamp switch.

Jerry Newton
Jerry Newton, GMC Technician
Category: GM
Satisfied Customers: 5,628
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
Verified
Jerry Newton and 87 other GM Specialists are ready to help you
Ask your own question now
Was this answer helpful?
Ask Jerry Newton Your Own Question
Jerry Newton
Jerry Newton
Jerry Newton, GMC Technician
Category: GM
Satisfied Customers: 5,628
5,628 Satisfied Customers
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.

Jerry Newton 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:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

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

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

GMC Mechanic

5,792 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

GMC Technician

1,537 satisfied customers

15 years gm master tech/15 years ASE master tech

car tech

car tech

ASE Certified Technician

449 satisfied customers

25 year master tech and shop owner

Chris (aka- Moose)

Chris (aka- Moose)

GMC Technician

211 satisfied customers

16 years of experience

Paul M ASE Master

Paul M ASE Master

ASE Master Tech

187 satisfied customers

ASE Master Tech 20+ Years

Anthony

Anthony

GMC Technician

489 satisfied customers

GM Certified

Amedee

Amedee

GMC Technician

455 satisfied customers

ASE certified tech with advanced level specialist. Wisconsin certified emissions state inspector

< Previous | Next >

Related GM Questions
2012 terrain I put a heater core in and now the info screen
2012 terrain I put a heater core in and now the info screen comes on but you can just bearly see it but the radio works. I changed screen that I saw work my self a still the same thing the radio has t… read more
GM Tech (Cam)
GM Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
5,792 satisfied customers
Driver front caliper has non stop air bubbles coming out, 2
Driver front caliper has non stop air bubbles coming out … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
Hope you are well, I need your help again concerning the
Jerry, Hope you are well, I need your help again concerning the issue listed below. I did as you suggested, the shop that's working on my H3 purchased the "pig tail" from GM and installed it yesterday… read more
Mechanic01
Mechanic01
2,385 satisfied customers
Trying to program key fob, it cycles when I let off of the
Trying to program key fob, it cycles when I let off of the unlock button but when holding down lock an unlock on fob at same time it never cycles. Have tried multiple times. … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
357 satisfied customers
97gmc5.7, I don't have power to the fuse block. I have
97gmc5.7 , I don't have power to the fuse block . I have checked the relay and have power, I also have jumped pin 30 to pin 87 and the fuel pump will not run. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
The anti theft is on. Car clicks but will not start, Just
The anti theft is on. Car clicks but will not start … read more
rpmdiag
rpmdiag
High school
7,511 satisfied customers
After $1,200; 100,000 mile maintenance and new battery,
After $1,200; 100,000 mile maintenance and new battery, driver's side climate control blows hot air. … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
357 satisfied customers
I need a wiring diagram for the rear liftgate ajar switch
i need a wiring diagram for the rear liftgate ajar switch for 2008 yukon denali. trying to find out what color wires to check as my rear access display keeps coming on. not sure if it is the hatch or … read more
Amedee
Amedee
GMC Technician
Vocational, Technical or Trade Scho
455 satisfied customers
My reverse will not work. 2001 gmc yukon. No it just
it made a loud noise like someone hit me then slowed down on my way home and sounds like a dying cat… read more
Joshua Davenport
Joshua Davenport
33 satisfied customers
2009 hummer h3 alpha had fuel leak removed tank fixed leak
2009 hummer h3 alpha had fuel leak removed tank fixed leak re install did not put enought fuel in and tried to start blew fuse and getting p023f code and p0232 and p069e. had new pump on order install… read more
Expert-Repair
Expert-Repair
Owner Kingsland Auto & Marine Services
Vocational, Technical or Trade Scho
11 satisfied customers
Cant start my 2009 chevy express van 2500 anti theft wont
cant start my 2009 chevy express van 2500 anti theft wont let it stat rt … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I have a 2004 Yukon sky passenger side blows hot drivers
I have a 2004 Yukon sky passenger side blows hot drivers side cold I already reset it twice and it didn't work any suggestions? … read more
Gary
Gary
GMC Technician
Vocational, Technical or Trade Scho
1,537 satisfied customers
For a 2007 Escalade which the temp control only works
For a 2007 Escalade which the temp control only works occasionally is the blend door actuator the only thing which could cause the problem? … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
357 satisfied customers
My 94 gmc 5,7 new pump not coming on and new injectors no
my 94 gmc 5,7 new pump not coming on and new injectors no spray … read more
Amedee
Amedee
GMC Technician
Vocational, Technical or Trade Scho
455 satisfied customers
2015 Escalade ESV usb plug in center console has no power
2015 Escalade ESV usb plug in center console has no power anymore for the rear pass when they want to plug in their cellphones. Please advise :)… read more
GM Tech (Cam)
GM Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
5,792 satisfied customers
I changed fuel regulator truck will crank but die when I
I changed fuel regulator truck will crank but die when I excerrate … read more
Chris (aka- Moose)
Chris (aka- Moose)
GMC Technician
Vocational, Technical or Trade School
211 satisfied customers
I have a 2015 GMC Sierra 1500 with the 5.3 V8 and yesterday
I have a 2015 GMC Sierra 1500 with the 5.3 V8 and yesterday it started knocking really bad when the truck switched into V4 mode...sounded like a machine gun or something. It does this only when the tr… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
No start on 2006 Hummer H2. Turn on key all dash
No start on 2006 Hummer H2. Turn on key all dash lights,radio,headlamps etc are on as soon as you try to crank everything goes out no crank. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 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