GMC

GMC troubleshooting questions? Ask a mechanic for answers

Ask an Expert,
Get an Answer ASAP!

Related GMC Questions
Second opinion] Back to trying to get my truck back on the
Second opinion] Back to trying to get my truck back on the road. It is a 2001 GMC Sierra 1500. I have asked my son and this is what he said he has done.Checked spark plugsChecked fuel pressureperforme… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
6,491 satisfied customers
2000 Jimmy 4.3 Starts, idles a bit rough, not bad. any
2000 Jimmy 4.3 Starts, idles a bit rough, not bad. any attempt to accelerate the engine bucks misfires, almost stalls...the scanner reads rich/lean at idle on both o2 sensors but when throttle is put … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
6,491 satisfied customers
99 GMC SUBURBAN running lean and starving for fuel when
99 GMC SUBURBAN running lean and starving for fuel when stompped on.Issue...5.7 vortex factory rebuild installed 5 years ago 30,000 on it, starving for fuel when stomped on. Truck idles and runs well … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
5,398 satisfied customers
PO 300 and PO101 codes. 2007 Envoy Denali with 5.3// Seafoam
Seafoam in tank now, and seafoamed top end , prior to this I has inefficient Bank two, but now yesterday I got a 171 … read more
sprinkles08
sprinkles08
Technician
High School or GED
18,071 satisfied customers
1999 GMC Jimmy 4.3L had a misfire in cylinder 6, tried the
1999 GMC Jimmy 4.3L had a misfire in cylinder 6, tried the basics to fix it....new cap, rotar, spark plug and wire for 6 only....didn't fix the problem....bought and replaced the entire spider assembl… read more
GM Bob
GM Bob
Automobile Technician
High School or GED
1,083 satisfied customers
96 5.7 vortec Rough idle, no stored,active or perm codes..
96 5.7 vortec Rough idle, no stored,active or perm codes.. scan tool acknowledges blinking ses but no dtc with it … read more
mike switzer
mike switzer
728 satisfied customers
GMC: 2000 gmc savanna 3500 5.7 Backfires and almost stalls
2000 gmc savanna 3500 5.7 Backfires and almost stalls when in reverse or drive with little or no throttle input. New fuel pump New filter New cap and rotor Replaced wires Had exhaust checked Not throw… read more
GM Bob
GM Bob
Automobile Technician
High School or GED
1,083 satisfied customers
gmc sierra: I have a 2006 gmc sierra 2500 6.0 liter engine.
I have a 2006 gmc sierra 2500 6.0 liter engine. The check engine light keeps coming on. The code is an o2 sensor code for both banks. I found a vacuum leak in the rubber piece that hooks to the pcv va… read more
Canadafix
Canadafix
Auto shop owner
Vocational, Technical or Trade Scho
1,507 satisfied customers
gmc yukon: engine is new fuel sending unit new fuel filter
engine is new fuel sending unit new fuel filter and vortex spider fuel injector new, new plugs and wires new, distributor new, has been checked repeatedly, random misfires on 2 & 3 cylinders while und… read more
Gary
Gary
ASE Certified Technician
18,051 satisfied customers
GMC 1500 Van: 96 GMC Van Fault codes P0137 & P0300 present.
'96 GMC Van Fault codes P0137 & P0300 present. Has misfire when engine is up to normal operating temperature. Service engine soon light flashing when misfiring. I've replaced the distributor cap & rot… read more
Gary
Gary
ASE Certified Technician
18,051 satisfied customers
GMC C1500 Sierra 4x2: Hello I have a GMC C1500 1998 5.7 2 wd
Hello I have a GMC C1500 1998 5.7 2 wd I just replace the Cat Converter Plugs and wires and Dist cap and rotar, and Coil I am getting muti miss fire readings. I just started Saturday when I punched it… read more
proautotech
proautotech
Shop Foreman
1,144 satisfied customers
GMC Suburban K25/K2500 4x4: i have a 1997 GMC Suburban 2500
i have a 1997 GMC Suburban 2500 with a 5.7litre. when the engine warms up it starts to stagger and doesn't run smooth until higher rpms. It stumbles when in gear and comes close to stalling.… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GM k1500: 1998 GMC k1500 comoing back from a long journey engine
1998 GMC k1500 comoing back from a long journey engine light came on started flashing then went solid drove truck home seemed to burn a lot more fuel when i arrived home checked plugs, wires, distribu… read more
Tim\u0027s Auto Repair
Tim\u0027s Auto Repair
Mechanic
High School or GED
14,660 satisfied customers
GMC surburban: OK my 98 GMC suburban 8 cylinder misses and
OK my 98 GMC suburban 8 cylinder misses and jerks like crazy we changed the spark plugs and wires it will run good for a min. then go back to missing the codes say cylinder 1 and 2 are misfiring and t… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,832 satisfied customers
GMC Serria: 1998 GMC Serria 1500, 5.0 V8 stumbles and backfires.
1998 GMC Serria 1500, 5.0' V8 stumbles and backfires. This condition just started on start-up two weks ago (never drove it). I've checked the EGR, Fuel pressure, cat conv, cap & rotor and replaced plu… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,832 satisfied customers
GMC Sierra K1500: I have a 1999 GMC Sierra K1500 with a 5.3L.
I have a 1999 GMC Sierra K1500 with a 5.3L. On initial startup the engine runs fine and shifts fine, but after the engine is hot and you shut it off for 15 to 30 minutes and restart it he engine hesit… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC G15/G1500 Van Vandura: 2005 gmc 1500 g sereis van 6 cyl.
2005 gmc 1500 g sereis van 6 cyl. has p0101 code, and p0300 and misfire on 2,4,6 pass.side. tuned up. no change. cleaned mass air, no change, replaced mass air, no change. long and short term fuel tri… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
29,925 satisfied customers
i have a 96 gmc truck 5.7 engine, it gives me p300 misfire
i have a 96 gmc truck 5.7 engine, it gives me p300 misfire code. i have changed cap, rotor, camposition sensor, plugs, wires number four ingector. i have a scan tool and can see the misfire on the num… read more
Tim\u0027s Auto Repair
Tim\u0027s Auto Repair
Mechanic
High School or GED
14,660 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

1,832 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

18,051 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