GMC

GMC troubleshooting questions? Ask a mechanic for answers

Connect one-on-one with {0} who will answer your question

Related GMC Questions
Jay AC working for about 1/2 hour the started blowing hot
Hi Jay AC working for about 1/2 hour the started blowing hot Stop truck to check pressure and looked ok Notice the compressor was on So was a On pass side of truck opened that door to check air and wa… read more
Jaybird61
Jaybird61
Master Automotive Mechanic
3,685 satisfied customers
I've been working on my '99 GMC Sierra I've been having
I've been working on my '99 GMC Sierra I've been having problems with the four wheel drive I changed the fluid in it because it was started making a weird noise I thought from the transfer case and st… read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
23,499 satisfied customers
2005 gmc 2500 no 4wd. I replaced the acuator on the front
I replaced the acuator on the front dif that's all fine. I have the 3 position dash switch. 2we 4 wd and 4low. The 4wd light was on steady but the case wasn't engaged. Took it to the dealer. Ran codes. They said it's the transfer case module not the encoder. 350 bucks later I plug that in now no dash lights on. It does flash when startin … read more
Tim\u0027s Auto Repair
Tim\u0027s Auto Repair
Mechanic
High School or GED
15,929 satisfied customers
I have a 99 gmc Sierra and I am having a lot of problems
I have a 99 gmc Sierra and I am having a lot of problems with the 4 wd.fist I had a severice 4wd light in the dash...replaced the the tcm the light went out but every time I tried to put it 4wd the at… read more
Ryan Kelley
Ryan Kelley
Director of Transportation
Technical School
146 satisfied customers
Service 4WD message. Code C0305. Sensor replaced and
Hi - Service 4WD message. Code C0305. Sensor replaced and connector cleaned. Frame grounds under driver also cleaned. … read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
23,499 satisfied customers
I have a 2001 GMC Sierra 4x4 Since we've gotten the truck in
I have a 2001 GMC Sierra 4x4 Since we've gotten the truck in the 4x4 has not worked properly. Have code c0323 Replaced selector switch, replaced encoder motor, and replaced tccm. Still unable to get 4… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
37,089 satisfied customers
TRANSFER CASE NOT SHIFTING. LOOKING FOR LOCATION OF THE
TRANSFER CASE NOT SHIFTING. LOOKING FOR LOCATION OF THE TCCM … read more
R Clark
R Clark
Senior Police Mechanic
Associate of Occupational Studies
233 satisfied customers
The 10 amp fuse for the climate control blows after a short
The 10 amp fuse for the climate control blows after a short while, but not immediately, which prevents use of temperature control and damper operation. I've already changed the damper control and the … read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
1,610 satisfied customers
2004 gmc envoy check 4wd light comes on. The checklight on
I am fixing it myself. I switched out tccm with a supposedly good used tccm. If I am parked I can here the actuators moving when I select 2wd/awd/4wd. … read more
JUSTIN KAZINSKI
JUSTIN KAZINSKI
Associates
1 satisfied customers
I am currently in Baja Mexico and have a 2004 GMC Sierra
I am currently in Baja Mexico and have a 2004 GMC Sierra 1500 5.3 L V8 with the following problems: Service 4W Drive on in message center No lights on Drive selector switch UBD Codes: U1000 Class 2 Da… read more
GM Bob
GM Bob
Automobile Technician
High School or GED
1,182 satisfied customers
I've got an '07 GMC 3500 HD 4x4 Duramax with a "Service 4
I've got an '07 GMC 3500 HD 4x4 Duramax with a "Service***** fault showing on my instrument panel. I have swapped the actuator out on the front drive axle, renewed the shift knob in my dash, checked f… read more
Jason Hablutzel
Jason Hablutzel
ASE Master Tech
57 satisfied customers
2001 GMC Jimmy I have replaced transfer case shifter motor,
2001 GMC Jimmy I have replaced transfer case shifter motor, TCCM and 4 button*****dash switch. It is still stuck in 4lo and I have no lights on the the*****dash switch.… read more
Ryan Schott
Ryan Schott
76 satisfied customers
I have a 07 GMC duramax wit Allison 4wd. wont shift into
I have a 07 GMC duramax wit Allison 4wd. wont shift into 4wd. Checked 4wd fuse OK. Selector switch wont light up. Front actuator don't engauge. where should we try next?… read more
Kevin Bourcier
Kevin Bourcier
Automotive Mechanical
118 satisfied customers
working on a 2005 gmc z71 I have the service 4wd on the dash
working on a 2005 gmc z71 I have the service 4wd on the dash . replaced switch . any idea's??… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC Sierra 2500 HD Classic SLT: I have a 2009 GMC 2500 HD (Diesel).
I have a 2009 GMC 2500 HD (Diesel). The vehicle seems to be locked in 4-low. The 4-WD indicator dial lights up all the lights and then goes out. The "Service 4-Wheel Drive" message comes up in the ind… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
37,089 satisfied customers
GMC K1500 Sierra 4x4: i have a 1998 GMC Sierra Pick up, the
i have a 1998 GMC Sierra Pick up, the 4wd will not engage, the 4 hi lite blinks a few times then goes back to 2hi. I have power going to the actuator on front axle, power going to i believe the encode… read more
shawnrbaldwin
shawnrbaldwin
Owner/mechanic
367 satisfied customers
GMC Sierra 1500 HD Classic SLE: I have a 2002 Sierra 1500hd
I have a 2002 Sierra 1500hd with the push button 4wd that keeps blowing the ATC fuse under the hood. I have changed the transfer case motor, front axle actuator and transfer case switch. Harness looks… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
2,126 satisfied customers
GMC Sierra 1500 HD Classic SLE: I have a 2002 Sierra 1500hd
I have a 2002 Sierra 1500hd with the push button 4wd that keeps blowing the ATC fuse under the hood. I have changed the transfer case motor and switch. Harness looks good with no chaffing or bare wire… read more
JHoop
JHoop
Owner,Technician
High School or GED
5,425 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.

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

2,126 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,589 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

904 satisfied customers

24 years of experience diagnosing & repairing

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

Mike S.

Mike S.

ASE Certified Technician

256 satisfied customers

GMC N.A.I.S.E. Certified Auto-Mechanic

George H.

George H.

ASE MasterTechnician

233 satisfied customers

15+ Years ASE Master Technician with Level 1 Certification

< Previous | Next >

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