GMC

GMC troubleshooting questions? Ask a mechanic for answers

Ask an Expert,
Get an Answer ASAP!

My 2002 Sonoma crew cab 4.3 4x4 started to run rough and the…

Customer Question
My 2002 Sonoma crew...

My 2002 Sonoma crew cab 4.3 4x4 started to run rough and the "check engine light" came on. The mechanic changed (2) O2 sensors, the catalytic converter and the fuel pump. The truck again did the same thing when it came under load on a hill, on the way home from the garage.

Mechanic's Assistant: Does the light stay on, or does it blink?

It blinks at first, then stays on.

Mechanic's Assistant: Are you fixing your Sonoma yourself? What have you tried so far?

I had it to the garage and the mechanic changed the oxygen sensors and the catalytic converter. He said that the computer reading indicated that they were faulty. After test driving it, the light came back on and he told me the fuel pressure was to low and that it needed a new fuel pump. I changed that my self. I am a retired truck mechanic but am not good with computers and do not have one that can read codes on cars.

Submitted: 11 months ago.Category: GMC
Show More
Show Less
Ask Your Own GMC Question
Answered in 2 minutes by:
8/3/2017
GMC Mechanic: KALAMYKID, Shop owner, tech replied 11 months ago
KALAMYKID
KALAMYKID, Shop owner, tech
Category: GMC
Satisfied Customers: 5,497
Experience: HAVE OWNED MY OWN SHOP FOR OVER THREE YEARS. I HAVE THE TOOLS AND SOFTWARE TO ANSWERE ALMOST ANY QUESTION CORECTLY.
Verified

What auto parts stores do you have near you? Many can read the codes for you for free. If you can have one read the codes for you , we can fix what is really wrong with your truck.

Ask Your Own GMC Question
Customer reply replied 11 months ago
I have several parts stores nearby. I will have them read the code tomorrow.
GMC Mechanic: KALAMYKID, Shop owner, tech replied 11 months ago

That would be great. If they will read the codes, wright them down and post them to this chat screen and I will go over what needs to be check and or tested to fix this problem.

Ask Your Own GMC Question
Customer reply replied 11 months ago
thank you
GMC Mechanic: KALAMYKID, Shop owner, tech replied 11 months ago

Chat with you tomorrow.

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: 1,811
1,811 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

1,811 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,588 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

626 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

279 satisfied customers

18+yrs experience. State Inspector & GMC Diagnostics/Repair

JFN1

JFN1

ASE Certified Technician

270 satisfied customers

GM Master Technician

George H.

George H.

ASE MasterTechnician

228 satisfied customers

15+ Years ASE Master Technician with Level 1 Certification

< Previous | Next >

Related GMC Questions
I have a 1995 gmc 5.7 TBI. erratic idol and i lose power
i have a 1995 gmc 5.7 TBI. erratic idol and i lose power when accelerating. … read more
JFN1
JFN1
ASE Certified Technician
Vocational, Technical or Trade Scho
270 satisfied customers
2005 8.1 idle rough and sometimes stalls. Consistent. Crew
2005 8.1 idle rough and sometimes stalls JA: Is the rough idle intermittent or consistent? Customer: consistent JA: What is the model of your '05 GM? Customer: crew cab 4x4 LS JA: Are you fixing your … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,653 satisfied customers
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
5,653 satisfied customers
Back to trying to get my truck back on the road. It is a
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 plugs Checked fuel pressure performed a fuel pres… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Seems to run good but I keep getting p0137. just relaced
seems to run good but I keep getting p0137. just relaced fuel pump and fuel fi ter.I am gettinw 12 vonts to sensor.How do I check the ground … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
Some times it cranks for a while before it start always
some times it cranks for a while before it start always start but takes a few turn of the engine … read more
Jared D
Jared D
Shop Supervisor
Bachelor\u0027s
3 satisfied customers
Gmc sierra: i have 02 gmc sierra with 5,3 service engine soon
i have 02 gmc sierra with 5,3 service engine soon light flashes under heavy load,pulling trailer on hills, no codes, truck does not seem like he has the power it normally does… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
GMC Denali: I have a 2003 GMC Denali 5.7 that will not
Hi I have a 2003 GMC Denali 5.7 that will not accelerate & has a rough Idle. When you try to give it gas it falls on its face.… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
1,811 satisfied customers
GMC Vandura 2500: I have a 1995 gmc vandura 2500 gave it a
I have a 1995 gmc vandura 2500 gave it a tune up ,start up good but when I go to drive it , there is barely enought power to make it up a hill,can't find the problement,thank you for your help.… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,588 satisfied customers
GM sonoma: truck started running like and exhaust manifolds
truck started running like shit and exhaust manifolds got cherry red.could go max 20km per hour.any idea's.2000 gmc sonoma 4x4..Dave… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
GMC s: June 23,2013 Hi, My name isXXXXX own a 1993
June 23,2013 Hi, My name isXXXXX own a 1993 GMC Suburban SLE 2500 with 454 cid V-8. It died suddenly on Sat and was towed to a repair facility. I make a note for the garage owner Dave and I am waiting… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
GMC 2500 4 by 4: I have a 97 gmc 4 by 4, 454 auto extend cab
I have a 97 gmc 4 by 4, 454 auto extend cab long box, what I need to know is my exhaust is finally shot and replacment is $1300, if I remove it and go with a cheaper way, what affect will not having t… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC Sonoma 4x4: I have a 2003 GMC Sonoma 4 door,XXXXX
I have a 2003 GMC Sonoma 4 door,XXXXXwith a 4.3 liter V6. I'll start out with a little history of the truck. I bought the truck with about 50,000 miles on it (it now has 129000 miles) and I would have… read more
tripletauto
tripletauto
Shop Foreman
Associate Degree
140 satisfied customers
Having issues with my 2002 GMC truck 5.3L codes p0130 p0150 and multiple missfire. 160k
Having issues with my 2002 GMC truck 5.3L codes p0130 p0150 and multiple missfire. 160k km on truck.(original 02 sensors) running rough and loss of power @wot and general idle.backfiring after headers… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
GMC 2500: 2002 GMC 2500 van with a 4.3. 212740 miles. Code
2002 GMC 2500 van with a 4.3. 212740 miles. Code P0430 popping up all the time. Cannot find vac. leaks, exhaust leaks, changed cats and O2 sensors. I did weld on after-market cats, with the required d… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
1,811 satisfied customers
hello i have codes p0141 p0140 and p0147 coming up on a 97 jimmy. The truck wants to cut o
hello i have codes p0141 p0140 and p0147 coming up on a 97 jimmy. The truck wants to cut out if i press down on the gas pedal hard as if I'm trying to get on an on ramp or pass a vehicle. If i continu… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
P0300 code. Replaced module, cap, rotor, plugs and wires as
P0300 code. Replaced module, cap, rotor, plugs and wires as well as coil and map sensor. NO vacuum leaks either. Checked and cleaned EGR and tested crank sensor. Problem still present. All wiring conn… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
1,811 satisfied customers
GM Sierra 1500: Check engine light came on a couple of weeks
Check engine light came on a couple of weeks ago. According to the code reading at the local auto parts store. The codes were showing two oxygen sensors. (Can't remember: Bank one/two??) Someone tells… read more
JFN1
JFN1
ASE Certified Technician
Vocational, Technical or Trade Scho
270 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