GMC

GMC Troubleshooting Questions? Ask a Mechanic for Answers

Ask an Expert,
Get an Answer ASAP!

GMC

I have a 1978 Chevy pick up C20 the. Truck is not charging…

Customer Question
I have a 1978 Chevy...
I have a 1978 Chevy pick up C20 the. Truck is not charging the battery, I purchase'd an alternator and had it check'd its OK, (2) I purchase'd a New battery. I check'd for shorts there are none (3) there are NO blown fuses, but when I remove positive cable as truck is runnuing motor turns off, Any idea's. Nick from L.A..Thanks.
Submitted: 1 month ago.Category: GMC
Show More
Show Less
Ask Your Own GMC Question
Answered in 23 minutes by:
12/26/2017
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 1 month ago
david craig
david craig, Owner/[email protected] 3D Atuomotive
Category: GMC
Satisfied Customers: 4,715
Experience: owner/mechanic at 3D Automotive
Verified

Hi my name is ***** ***** I'll be more than happy to assist you. Please allow me a few minutes to review your information. Thank you

Ask Your Own GMC Question
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 1 month ago

when you remove the positive cable from the battery while its running, it's going to shut off the vehicle. what do you think is powering everything?

Ask Your Own GMC Question
Customer reply replied 1 month ago
The battery , that why after driving for an hour or so the truck shuts off and will not start again without a jump.
Customer reply replied 1 month ago
Thank You, ***** *****'d rather text.
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 1 month ago

whats the battery voltage reading while running?

Ask Your Own GMC Question
Customer reply replied 1 month ago
Its reading 4.3.
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 1 month ago

4.3? volts dc?

Ask Your Own GMC Question
Customer reply replied 1 month ago
But I haven't used my volt meter in years am not sure I have it on the right setting. So that reading may not be correct.
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 1 month ago

set it on the 20-volt scale for dc volts. put black lead on the negative battery terminal. red lead on positive

Ask Your Own GMC Question
Customer reply replied 1 month ago
Ok
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 1 month ago

let me know

Ask Your Own GMC Question
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 1 month ago

hows it going?

Ask Your Own GMC Question
Ask Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1,734
1,734 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

1,734 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

227 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
Bob, how do I check voltage on alternator on my 2015 gmc
Bob, how do I check voltage on alternator on my 2015 gmc yukon xl 6.2L? … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
1,734 satisfied customers
Alternator keeps needing replacement third one in a year.
alternator keeps needing replacement third one in a year. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Have a 2012 gmc terrain. I just replaced the battery in it
Hey I have a 2012 gmc terrain. I just replaced the battery in it and now everything is in metric instead of US. In the menu the option for units is no longer there … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,644 satisfied customers
ABS, battery, airbag lights are on in the inst cluster.
ABS, battery, airbag lights are on in the inst cluster. Power windows will not roll up. This happened after trying to start the truck with a dead battery … read more
roy
roy
Associate Degree
3 satisfied customers
I am changing my alternator. It gives two option 145 or 160
I am changing my alternator. It gives two option 145 or 160 not sure which to pick and does it matter?… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,644 satisfied customers
Battery will not charge. new battery and new alternator. The
battery will not charge. new battery and new alternator … read more
Cesar Jimenez
Cesar Jimenez
Owner/CEO
Vocational, Technical or Trade School
130 satisfied customers
I have a brand new battery in but my battery level sits at
I have a brand new battery in but my battery level sits at about 11 on the cluster and won't turn on, if I boost it the truck starts and runs normal but if I turn the truck off the truck immediately w… read more
Mechanic01
Mechanic01
1,992 satisfied customers
New battery drains overnight. No but the battery is new. The
No but the battery is new. The same thing happened before the battery was replaced. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
I just bought a new battery at autozone and they put it in
I just bought a new battery at autozone and they put it in but the next day when I tried to put 2006 gmc envoy into two wheel drive from auto it just flashes and then moves to four wheel drive high. I… read more
tim37857
tim37857
Mechanic
High School or GED
71 satisfied customers
It will Not start. We tried a new battery- its not the
We tried a new battery- its not the battery, nothing is corroded … read more
david craig
david craig
Owner/[email protected] 3D Atuomotive
4,715 satisfied customers
Is it normal for a car battery voltage increase after trying
Is it normal for a car battery voltage increase after trying to unsuccessfully start the car and then letting it sit for several moments?… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,557 satisfied customers
Battery fully charged but when the remote is in proximity
battery fully charged but when the remote is in proximity and brake is depressed nothing happens … read more
GM Bob
GM Bob
Automobile Technician
High School or GED
1,006 satisfied customers
Replaced original battery with an Exide, 18 months later
replaced original battery with an Exide, 18 months later battery will not keep voltage if car sits for 4 days. Replaced battery under warranty from Exide, Worked for another 18 months same problem. If… read more
Todd M
Todd M
Owner
ASE Certification
1,559 satisfied customers
Battery saver light came on. Battery test with the engine
Battery saver light came on. Battery test with the engine off at 12.7 VDC, With the engine running at an idle 15.7 VDC. Trying to locate the issue … read more
Mechanic01
Mechanic01
1,992 satisfied customers
Battery is dead all of a sudden. symble on dash = Battery
battery is dead all of a sudden. symble on dash = Battery malfunction It's a 2013 Acadia … read more
AZTechBrian
AZTechBrian
ASE Certified Technician & Shop Owner
Vocational, Technical or Trade School
732 satisfied customers
Battery light was on this am but alt is charging. Battery
Battery light was on this am but alt is charging. Battery was dead but is 6 years old. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Battery goes dead overnight, BAttery is good. Alternator is
BAttery is good. Alternator is good. I have pulled every fuse and can't find a circuit that is causing the draw. … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,557 satisfied customers
Installed a new alternator and I did not unhook the battery.
Installed a new alternator and I did not unhook the battery. The starter wire touched something and sparked. Now my truck will not start, the lights will not come on interior or exterior, the auto loc… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 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