GMC

GMC troubleshooting questions? Ask a mechanic for answers

Ask an Expert,
Get an Answer ASAP!

Related GMC Questions
Pulled heads and installed a cam and 2 lifters and now i
pulled heads and installed a cam and 2 lifters and now i have 60 lbs compression. 2012 Denali 6.2 amf … read more
Danny
Danny
Owner, lead mechanic
High School or GED
4,713 satisfied customers
I GOT A 2013 YUKON DENALI I CHANGED THE VALVE LIFTER 3 WEEKS
I GOT A 2013 YUKON DENALI I CHANGED THE VALVE LIFTER 3 WEEKS A GO, BUT NOW THE SAME LIFTER GOT DAMAGED, WHAT COULD IT BE? … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,823 satisfied customers
We have a GM Yukon Denali XL with the 6.2 that has a miss in
We have a GM Yukon Denali XL with the 6.2 CID that has a miss in cylinder number 8 and the dealership can not determine why. Can yo help in anyway? … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
6,449 satisfied customers
Replaced cylinder heads on 2001 5.3. Did not remove cam
Replaced cylinder heads on 2001 5.3. Did not remove cam lifters etc. Is it required to set to TDC before torquing rocker arms. As stated only replaced head gaskets and cylinder heads with reman comple… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
My GMC is showing cylinder #1 and #4 misfire. Need Help
Hello, 2008 gmc 1500 5.3 engine. I did a head job on this motor, I installed the parts myself, a machinist gave the heads a working over. Once I finished my installation, I am getting a cylinder #1 an… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
6,449 satisfied customers
We just got done doing an engine rebuild due to oil pump
We just got done doing an engine rebuild due to oil pump failure. Now with refreshe engine i am still getting low oil alarm when stopped at a light after engine has been running for 30 min on the high… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
5,398 satisfied customers
2007 GMC Yukon Denali XL 6.2 112K Problem is oil pressure
2007 GMC Yukon Denali XL 6.2 112K Problem is oil pressure drops to 0 on gauge. warning lights come on dash saying low engine oil pressure shut off engine. no engine trouble codes. engine oil is full. … read more
John Bryant
John Bryant
Semi-retired
20 satisfied customers
Have a 2011 Yukon Denali with 200K on it, that just started
Have a 2011 Yukon Denali with 200K on it, that just started making a loud tapping sound coming from inside engine. Still running fine and no codes have been set. oil pressure is fine. and looks good. … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,823 satisfied customers
08 gmc 5.3l with AFM. Standard ticking noise. Compression
08 gmc 5.3l with AFM. Standard ticking noise. Compression test showed no more than 10 psi difference in between cylinders. So I moved coils around, replaced plugs and wires, and also switched injector… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,823 satisfied customers
GMC Sierra 2500 HD: Neal, My name is ***** ***** I have a
Hi Neal, My name is ***** ***** I have a 2004 GMC HD2500 6.0l (Gas) Vortec motor. #7 cylinder losing compression. Removed valve rocker arm and valve push rod that was not under pressure. Replaced the … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
i have a 2010 6.0 denali hybrid and i have mifire on #1
i have a 2010 6.0 denali hybrid and i have mifire on #1 cyclinder took valve cover off and #1 intake is not moveing valve looks up like rest the push rod looks straight ( lifter ? ) is there anything … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC Yukon 1500: 2004 GMC Yukon 5.3L engine 265,278 km. Oil
2004 GMC Yukon 5.3L engine 265,278 km. Oil pressure showing lower then it usually does on dash gauge - low oil pressure warning light and chime come on sometimes when engine hot and idling at stop lig… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,823 satisfied customers
GM Envoy Denali: I have an 06 envoy denali with the 5.3 and
I have an 06 envoy denali with the 5.3 and it has afm cylinder 6 is dead no fire whatsoever but with that situation there is a horrible valve train noise and some times a loud snap noise to go along w… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC Envoy Denali: Hi Folks, 2006 GMC Envoy Denali, 5.3L
Hi Folks, 2006 GMC Envoy Denali, 5.3L w/175K extremely well maintained miles on her. Sudden right side ticking, skipping, check engine light. Onstar says it's a P0300 code. I changed the plugs & wires… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC Yukon Denali XL: I have a 2005 Yukon Denali XL that I bought
I have a 2005 Yukon Denali XL that I bought about 8 months ago. I change the oil for the first time back in December and used Mobile One 15K synthetic oil and used a Fram Extra Guard filter. Two days … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,823 satisfied customers
GMC Yukon XL 1500: 2007 Yukon xl. 5.3L , 101,000mi. Number
2007 Yukon xl. 5.3L , 101,000mi. Number 1 cylinder, no compression. Pulled valve cover, intake valve frozen, no slack in rocker arm, rocker arm is frozen in place.… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC Suburban K25/K2500 4x4: 1998 7.4L Lifter/rod noise Removed
1998 7.4L Lifter/rod noise Removed valve cover and found very loose rods on @2 intake and exhaust. Removed the rocker arm and the push rods. Rods are not bent. wat would cause the rods to be loose??? … read more
Randall C
Randall C
Auto Technician / Consultant
Vocational, Technical or Trade Scho
12,661 satisfied customers
2005 GMC ENVOY 5.3. ENGINE CODE P0300... CYLINDER NUMBER 5
2005 GMC ENVOY 5.3. ENGINE CODE P0300... CYLINDER NUMBER 5 IS MISFIRING. SWAPPED COILS, INJECTORS, SPARK PLUGS,WIRES, SMOKED TESTED FOUND NO LEAKS, REPLACED INTAKE MANIFOLD GASKET. CHECKED INJECTOR PU… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,823 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

1,823 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

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

< 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