GMC

GMC troubleshooting questions? Ask a mechanic for answers

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

I have an 02 GMC Sierra 1500 with a 4.8 engine (230K miles).

Yesterday while on a small...
I have an 02 GMC Sierra 1500 with a 4.8 engine (230K miles). Yesterday while on a small road trip, the battery light started intermittent flashing when first started up. This happened a few times and rapidly progressed to staying on about 95% of the time. I drove the 100 plus miles home but as I drove my voltage gauge slowly went down. Truck got me home but battery almost dead. I assume that the issue is a voltage regulator or the alternator itself. Any idea's?Matt
Show More
Show Less
Ask Your Own GMC Question
Answered in 1 minute by:
3/13/2018
roybelding
roybelding, Master Tech/Trainer
Category: GMC
Satisfied Customers: 7,755
Experience: 35 years of retail operations on all vehicles
Verified

hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.

Roy

Ask Your Own GMC Question

Good morning

Yes, you have an alternator failure. Even if it was a regulator you want to replace the whole assembly. replace the alternator and re check the voltage

Roy

Ask Your Own GMC Question
Customer reply replied 4 months ago
A little confused, is the voltage regulator part of the alternator?

yes, it is internal in the alternator.

roybelding
roybelding, Master Tech/Trainer
Category: GMC
Satisfied Customers: 7,755
Experience: 35 years of retail operations on all vehicles
Verified
roybelding and 87 other GMC Specialists are ready to help you
Ask your own question now
Customer reply replied 4 months ago
Many thanks Roy

thank you

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 roybelding Your Own Question
roybelding
roybelding
roybelding, Master Tech/Trainer
Category: GMC
Satisfied Customers: 7,755
7,755 Satisfied Customers
Experience: 35 years of retail operations on all vehicles

roybelding 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

1,796 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
On 3rd gear full throttle the truck reaches almost 5000rpm
on 3rd gear full throttle the truck reaches almost 5000rpm then goes to reduce engine power and error p1689 appears … read more
roybelding
roybelding
Master Tech/Trainer
Associate Degree
7,755 satisfied customers
I have a 2011 GMC Sierra 1500 SLE with a 5.3l v-8. Driving
I have a 2011 GMC Sierra 1500 SLE with a 5.3l v-8. Driving home had an issue, lights dimmed had a traction control off message, shortly after the truck stalled and no power. Changed the alternator and… read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
97 satisfied customers
I charged battery on 1999 GMC Z71, now my speedometer is
I charged battery on 1999 GMC Z71 , now my speedometer is stuck [ pegged ] at 100 mph . won't move no matter how much i pray and cuss . Help . … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
2000 GMC Sierra 1500 V6 wont start after rain. It just
2000 GMC Sierra 1500 V6 wont start after rain. It just cranks and appears to catch but dies out. Previously it would start and run rough until the engine warmed but now it just cranks. I get code P195… read more
Merc320
Merc320
Highbury College
358 satisfied customers
I have a 2000 GMC Sierra 1500 5.3l. It does not charge. I
I have a 2000 GMC Sierra 1500 5.3l. It does not charge. I replaced alternator and cleaned all cables. Still doesn't work. I asked another mechanic about it and he said computer. Gave me a wire to chec… read more
Jared D
Jared D
Shop Supervisor
Bachelor\u0027s
3 satisfied customers
My 1993 gmc sierra 4.3 L truck will start but before I move
My 1993 gmc sierra 4.3 L truck will start but before I move it starts to spudder and then it dies. I drove to work today had no problems. Round trip 80 miles. Got home Then went to leave hour later an… read more
George H.
George H.
ASE MasterTechnician
Associate Degree
228 satisfied customers
Yesterday I installed a new alternator on my 1999 GMC K1500
Yesterday I installed a new alternator on my 1999 GMC K1500 Sierra Classic. After running the engine for about 5 minutes, my battery gauge on the dash went all the way up to the max, and the engine su… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,588 satisfied customers
The alternator on my 2010 GMC Yukon XL ( with 50,000 miles
the alternator on my 2010 GMC Yukon XL ( with 50,000 miles on it ) flucuates . We replaced the battery, same problem, changed the alternator.. same problem. Brought to GMC dealer that I purchased it f… read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
GMC Sierra 1500: 2007 GMC Sierra, truck dies intermittently
2007 GMC Sierra, truck dies intermittently after turning off vehicle. No power at all. Pulling on positive battery cable makes the truck regain power again. Also, intermittent electrical issues while … read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
Good day. I have a 2007 GMC Yukon that is having a similar
Good day. I have a 2007 GMC Yukon that is having a similar issue with lights flickering at idle. Headlights, tail lights , license plate lights interior lights any insight would be helpful thanks… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
1,323 satisfied customers
GMC Savannah: I have a 1998 GMC savannah conversion van I recently
I have a 1998 GMC savannah conversion van I recently purchased. The old owner said to make sure all light were out. Bought it and drove home, no problem. Next morning battery was dead. Jumped and went… read more
supermechanic
supermechanic
Service consultant
Vocational, Technical or Trade Scho
10 satisfied customers
GMC Sierra 1500 Classic SLE: my 2004 gmc sierra battery was
my 2004 gmc sierra battery was dead. I put new alternator and battery in, now it starts fine and has 14 volts on meter and guage, it stalls when I turn like the a/c on. Any ideas?… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
GMC Savanna: My 2001 GMC 2500 series Savanna with 4.3 vin 1GTGG25W311141661,
My 2001 GMC 2500 series Savanna with 4.3 vin 1GTGG25W311141661, has 381000 miles. My volt meter is showing that battery is losing charge. I charged it overnight, drove about 30 miles and saw voltage m… read more
Ron Z.
Ron Z.
- GMC Tech -
Vocational, Technical or Trade Scho
279 satisfied customers
gmc sierra 1500: battery voltage guage dropped dead dead dead
battery voltage guage dropped dead dead dead instantly on drive home. truck(97 gmc sierra 1500) ran fine for rest of commute but battery was getting weak by time i arrived. Now have new battery, belts… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,588 satisfied customers
GMC gmc: one day volts were at 12 volts and 100ft. back to
one day volts were at 12 volts and 100ft. back to normal. started truck later that day back to 12 volts. got home checked alternator and conections everything great. started truck back to normal volts… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
GMC 1500 Sierra: I have a 94 GMC 2/w dr single cab 8ft. bed
I have a 94 GMC 2/w dr single cab 8ft. bed 1500 sierra,VIN#1gtec14k3re523107. On 9/11 I had the engine replaced (350 w/200,000+ miles) with a new 350 5.7 from chevy and I brought in a 4L60E from a goo… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
GMC Sierra 1500: So my 1997 GMC sierra 1500, 5.7 liter 4 wheel
So my 1997 GMC sierra 1500, 5.7 literXXXXXhas been running great without difficulty until yesterday. I was traveling highway miles when i got off at my exit and noticed that it wanted to stall when at… read more
zzdaryl
zzdaryl
Lead Auto Tech
Some college and advanced training
4 satisfied customers
gmc Sierra 2500 HD SLE: I have a 2002 gmc sierra 2500 HD diesel.
I have a 2002 gmc sierra 2500 HD diesel. Recently the battery died. I jumped it, and it ran fine for about 45 miles. Sat overnight, battery was dead again. So I put a new battery in it. Drove it about… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,796 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