GM

GM repair problems? Ask a GM repair expert now.

Ask an Expert,
Get an Answer ASAP!

Related GM Questions
Tripletauto, I have a 2006 Hummer H3. I was having some
Hi Tripletauto,I have a 2006 Hummer H3. I was having some acceleration struggles last week ( when I would come to a stop, the engine would some times idle down and shut off, causing me to put the truc… read more
Todd Audette
Todd Audette
GMC Technician
Vocational, Technical or Trade School
428 satisfied customers
GM sierra: I have a 2009 GMCsierra with a 6.2L, I'm having
I have a 2009 GMCsierra with a 6.2L, I'm having an issue with my stabilitrak, reduced engine power, and traction control. I have read that is is common occurance with GM vehicles of this year and that… read more
Gary
Gary
GMC Technician
Vocational, Technical or Trade Scho
1,561 satisfied customers
GM Yukon XL Denali: Ken - this is the same problem Im having.
Ken - this is the same problem I'm having. My local dealer apparently has never dealt with this issue. Do you have a number of a service bulletin or recall campaign that I can give them? They had my '… read more
Wayne Crawford
Wayne Crawford
3,928 satisfied customers
GM 2500 HD: We have a 2008 Chevy 2500 HD. Every 400 miles or
We have a 2008 Chevy 2500 HD. Every 400 miles or so we experience reduced engine power. We have replaced the GM throttle motor. Appears to have new APPS. It has a new pig tail to the throttle motor. T… read more
Hal
Hal
owner/service tech
Vocational, Technical or Trade Scho
925 satisfied customers
Yukon: Engine problem..Dealer replaced fuel pump, same problem.
I have a 03 Yukon Xl 5.3. Reduce Engine problem. Dealer replaced fuel pump, same problem. Then they cleaned the throttle body, same problem. The third time the dealer replaced the throttle body, same … read more
Ken
Ken
GM Auto Tech.
Vocational, Technical or Trade Scho
754 satisfied customers
Both o2 sensors came up during inspection..sensors replaced..upstream
codes for both o2 sensors came up during inspection, both sensors replaced. new upstream sensor lasted for about 12 hours before code came back. replaced it again. car now starts sometimes and sometim… read more
John
John
MASTER AUTOMOTIVE TECHNICIAN
2 YEARS COLLEGE
8,101 satisfied customers
2006 gmc envoy: instrument panel i had light turn..idling..cylinder
light on in the form of engine on instrument panel i had light turn off they told me code was 506 or p0506 low idling any suggesting 2006 gmc envoy 6 cylinder… read more
John
John
MASTER AUTOMOTIVE TECHNICIAN
2 YEARS COLLEGE
8,101 satisfied customers
2006 GMC: 4x4..ignition switch..the pedal position sensor..dash lights
my 2006 GMC 4x4 envoy HAS THROWN MORE CODES THAN A SPY. first they replaced the PCM twice, then the throttle body then the ignition switch then the pedal position sensor then the fuel tank sensor and … read more
Amedee
Amedee
GMC Technician
Vocational, Technical or Trade Scho
470 satisfied customers
2008 Chevy Silverado 4.8L 4x4 How do I fix code P0507 - Idle
2008 Chevy Silverado 4.8L 4x4 How do I fix code P0507 - Idle Control System RPM Higher Than Expected? Thanks… read more
John
John
MASTER AUTOMOTIVE TECHNICIAN
2 YEARS COLLEGE
8,101 satisfied customers
2004 2500 series: drops..I open the hood an push the throttle chip
My gmc pickup 2004 2500 serieshd when you turn on the air or the lights it drops an says reduced power, then it won't pick up any speed as it will only go around 20 t0 30 miles per hour, than I open t… read more
Dave Nova
Dave Nova
Auto Dealership Owner
Associate Degree
17,291 satisfied customers
2008 gmc: stabilitrak..have to pull over and shut off the vehicle
2008 gmc sierra. stabilitrak service message comes on and the power reduced message also. have to pull over and shut off the vehicle for a moment. What does the stabilitrak service intail and what sho… read more
John
John
MASTER AUTOMOTIVE TECHNICIAN
2 YEARS COLLEGE
8,101 satisfied customers
2003 GMC Sierra 1500: throttle..limp mode I..1500 rpm..cuts
I have a 2003 GMC Sierra 1500 four by four that will go into limp mode if I am unable to exceed 2500 rpm on take off, and also I can't keep constant throttle pressure or it will go into limp mode. Whi… read more
mcgruder73
mcgruder73
Auto Technician
Associate Degree
My truck is 2004 z71 1\2 ton..engine power..cooling system
my truck is 2004 z71 1\2 ton. "reduced engine power" msg is displayed after start-up.can the problem be something other than cooling system? it was running perfectly yesterday… read more
John
John
MASTER AUTOMOTIVE TECHNICIAN
2 YEARS COLLEGE
8,101 satisfied customers
2003 gmc sierra 1500: rain..crank..I bought a Code reader..same codes
I have a 2003 GMC Serria 1500 HD. The Reduce Power message will appear after a rain or it seems as if you crank and then shift into gear too fast. I bought a Code reader and clear when this happens, a… read more
Butch
Butch
Vocational, Technical or Trade Scho
375 satisfied customers
03 Denali 6.0 with 140K miles.DTC codes P0101,P0120,P0174,P0220,P2135,P0101,P0171,P0174
03 Denali 6.0 with 140K miles.DTC codes P0101,P0120,P0174,P0220,P2135,P0101,P0171,P0174 sometimes high idle sometimes low idle. Erased codes--New codes;P0171'P0174,P0101,P0171,P0174,and P0300.I've TPS… read more
Dave Nova
Dave Nova
Auto Dealership Owner
Associate Degree
17,291 satisfied customers
2001 gmc: service engine soon..few seconds..runs fine..position sensor
2001 gmc sierra 2500....truck w not accelaerate at times and the reduce power warning light comes on as well as service engine soon.....throttle in nonresponsive ...I shut engine down wait a few secon… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
2,870 satisfied customers
2003 gmc: the dashboard reads reduce engine power,stability sys
i have a 2003 gmc denali and the dashboard reads reduce engine power,stability sys disabled. The truck will start but when you press on the gas its won'trev up like it'snot getting any gas… read more
Dave Nova
Dave Nova
Auto Dealership Owner
Associate Degree
17,291 satisfied customers
This is my first time doing this but I am getting frustrated.
This is my first time doing this but I am getting frustrated. I took my 2005 Gmc envoy to the dealership to run a diagnostic test on it. They told me it would be my thermostat needed changing and a fu… read more
GMC Tech
GMC Tech
SERVICE TECHNICIAN
Associate Degree
369 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:

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

5,844 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

GMC Technician

1,561 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

234 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

470 satisfied customers

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

< 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