GMC

GMC troubleshooting questions? Ask a mechanic for answers

Ask an Expert,
Get an Answer ASAP!

I have a 1997 K2500 3/4 tin pickup truck With a 5.7 L motor…

Customer Question
I have a 1997 K2500...
I have a 1997 K2500 3/4 tin pickup truck With a 5.7 L motor problem I’m having is exhaust flange between the two catalytic converter’s keeps burning out. I’ve tried to triple gasket the flange and it still burns up the gasket. What do you think the problem is?
Submitted: 7 months ago.Category: GMC
Show More
Show Less
Ask Your Own GMC Question
Answered in 2 minutes by:
11/13/2017
GMC Mechanic: George H., ASE MasterTechnician replied 7 months ago
George H.
George H., ASE MasterTechnician
Category: GMC
Satisfied Customers: 19,240
Experience: 15+ Years ASE Master Technician with Level 1 Certification
Verified

Hello I will help,

If you have a helper run the engine at 2500-3000 rpm are the cats getting red and glowing?

Are all the exhaust hangers in place and holding the pipes?

I would expect a restricted cat or an overfueling situation causing excess heat at that point.

Take a look and let me know.

Ask Your Own GMC Question
Customer reply replied 7 months ago
I’m at work right now not able to do this
Customer reply replied 7 months ago
I can’t talk right now at work.
GMC Mechanic: George H., ASE MasterTechnician replied 7 months ago

That is fine, when you get a chance to check if the pipes or cats glow at speed let me know by posting back to this thread, I am here most of the time

Thanks

Ask Your Own GMC Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a gmc mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1,793
1,793 Satisfied Customers
Experience: GM Grand Master Technician 2007. 14 year experience.

Gm Tech (Cam) 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

1,793 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

19,240 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
GMC envoy denali: I have a 2007 envoy Denali v8, 5.3L (78,000
I have a 2007 envoy Denali v8, 5.3L (78,000 miles), Tuesday while driving in the highway the “Low oil pressure /stop engine”. Come out in the instrument cluster, pull over open the hood, check oil it … read more
Ron Z.
Ron Z.
- GMC Tech -
Vocational, Technical or Trade Scho
259 satisfied customers
99 5.7 Vortec. rough idle
Trying to find cause of rough idle for 99 5.7 Vortec. Here's the whole story. Bought brand new LB from Marshall Engines. After 11k miles passenger side head gasket leak found. Tore down, repaired, and… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
GMC Sierra 2500 HD: How to fool knock sensors on 6.0 liter
How to fool knock sensors on 6.0 liter engines… read more
Aran
Aran
Technician
Associate Degree
392 satisfied customers
I think I have an exhaust leak in my 2010 GMC Terrian its
Hi I think I have an exhaust leak in my 2010 GMC Terrian its loud when I statrt it then quiets down when it has ran for around 5 minutes when I go down the road I can here a sound like wind on the pas… read more
roy
roy
Associate Degree
3 satisfied customers
Service exhaust fluid light came on read the code and it
Service exhaust fluid light came on read the code and it said reluctant heater we replaced that but do not know how to reset the system, engine is limited to 4 mph. … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
Exhaust valve on #6 will not hold compression 62000 miles on
Exhaust valve on #6 will not hold compression 62000 miles on car … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,557 satisfied customers
Exhaust gas temp. sensor #1 where is it? Egr has been
yes egr has been replaced and clogged, engine code from dealer said exhaust gas temperature sensor #1 … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
362 satisfied customers
I have a 2015 GMC Denaili 2500hd the exhaust fluid is
Second opinion] I have a 2015 GMC Denaili 2500hd the exhaust fluid is showing 42 miles before dropping to 4 mph what can I do… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
1,793 satisfied customers
I have a 2015 GMC Denaili 2500hd the exhaust fluid is
I have a 2015 GMC Denaili 2500hd the exhaust fluid is showing 42 miles before dropping to 4 mph what can I do … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Diesel exhaust system service? speed limited to 4mph and i
diesel exhaust system service? speed limited to 4mph and i am 20 miles from town … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
583 satisfied customers
2013 gmc duramax diesel: service exhaust fluid system
2013 gmc duramax diesel: service exhaust fluid system warning light and states will reduce speed. Filled DEF tank, warning persists … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
583 satisfied customers
Getting a service message on my exhaust fluid system and is
getting a service message on my exhaust fluid system and is transitioning to 65mph … read more
Gabriel Grey
Gabriel Grey
Master Service Technician
Associates
446 satisfied customers
GM: i have a 2008 GMC sierra sle1 with a 5.3L Vortex engine
i have a 2008 GMC sierra sle1 with a 5.3L Vortex engine that smokes at start-up. Could this be a PCV problem and if so where is it located on this engine?… read more
KBB
KBB
SERVICE TECHNICIAN
Associate Degree
156 satisfied customers
2007 GMC Yukon w/6.2 engine. Broke a valve
2007 GMC Yukon w/6.2 engine. Broke a valve spring at about 157K. No other damage. Broke another (other cyclinder bank) at 163K. Spring broke in 3 pieces and dropped valve, which was hit by piston. Hea… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,557 satisfied customers
GMC Buick century: What is cure for code P0420
What is cure for code P0420… read more
Ron Z.
Ron Z.
- GMC Tech -
Vocational, Technical or Trade Scho
259 satisfied customers
6 codes were up on my 2013 GMC Sierra 3500HD with 6.6 Turbo
6 codes were up on my 2013 GMC Sierra 3500HD with 6.6 Turbo Diesel. P2493 P245C P24C4 P2493(PD) P245C(PD) P24C4(PD) Please advise what to fix.… read more
Todd M
Todd M
Owner
ASE Certification
1,802 satisfied customers
GM Envoy: Error Code P2432
Error Code P2432 What does a secondary Air Injection valve do, and what sort of symptoms would its failure produce? The Vehicle seams to not shift into high gear(overdrive).… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
GMC Top Kick: I have a 92 Top Kick with a 366 Factory heat
I have a 92 Top Kick with a 366 Factory heat shields and Boot protectors. I have replaced 3 sets of wires with in last month. There is pleanty of space around the wires and they are not touching any t… read more
jmbenedict02
jmbenedict02
2 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