Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

I have a 2002 Chevy Tahoe with new alternator and battery…

Customer Question
I have a 2002...

I have a 2002 Chevy Tahoe with new alternator and battery purchased Dec 2016. The vehicle was driven regular with no problem. Sep 2017 I parked vehicle for 7 days when returned all system was dead. I received a jump and drove approx. 35 miles with no problem. I also notice vehicle volt meter never drop below 14. 3 more days without driving and discovered battery was dead again. What could be causing this sudden problem.

Mechanic's Assistant: Did you test the battery with a voltmeter? And have you ever changed one before?

Before jumping batter meter indicated 5.0V (poor) after jumping checked 12.5V (good). I just exchanged battery today however sale person tell me battery had low charge but good and I should replace alternator. My alternator indicates a 14.0V (strong output)

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

Thinking of having elec. system checked by a pro. in my area.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

No, thanks

Submitted: 10 months ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 5 minutes by:
10/6/2017
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 10 months ago
AMEDEE
AMEDEE, CHEVY TECHNICIAN
Category: Chevy
Satisfied Customers: 28,311
Experience: ASE certified tech ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
Verified

Hello and welcome!

My name isCustomerand I can assist you with your question.

Ask Your Own Chevy Question
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 10 months ago

It sounds like there is a battery draw when the vehicle is turned off.

Would you like a test to help pinpoint the battery draw on the vehicle?

Ask Your Own Chevy Question
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 10 months ago

Certainly. One moment please

Ask Your Own Chevy Question
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 10 months ago

To diagnose this condition, you are going to have to pinpoint what is drawing the battery down when the engine is turned off. To do this, you will need to disconnect the negative battery terminal from the battery and put a test light between the negative cable and the negative battery terminal. With the key out of the ignition switch and the vehicle just sitting there (make sure the doors are closed) the test light should not light up bright. If it does, there is a draw that will need to be diagnosed.

Then from there, to find out what circuit the battery draw is on, disconnect one fuse at a time until the test light goes out. When it does, you have found the circuit that the draw is on. If you use a voltmeter to do this, anything over 100ma is too much draw.

Ask Your Own Chevy Question
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 10 months ago

I am glad I can help!

Please don't forget to honor your good faith deposit by rating my answer as "5 STARS or SMILEY FACES" for assisting you today.

Keep in mind, we can still continue this conversation at no further cost to you even after you rate my answer. Just reply back to me using this page and I will get it and get back to you ASAP!

I just ask that you allow time in between replies as I may be helping other customers or off line spending time with the family.

Also, if you are a member or if you have a subscription to the site, you still need to rate my answer in order for me to get credit for assisting you with your question.

You should see the rating system towards the top of the page.

Please let me know if you have any further questions.

Thanks and have a great day!!

Ask Your Own Chevy Question
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 10 months ago

Hello there!

I am just checking in to see how things are going and to see if you need any further assistance?

If so, please let me know as I will be happy to help.

Best Regards,

Customer/p>

Ask Your Own Chevy Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a chevy mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask AMEDEE Your Own Question
AMEDEE
AMEDEE
AMEDEE, CHEVY TECHNICIAN
Category: Chevy
Satisfied Customers: 28,311
28,311 Satisfied Customers
Experience: ASE certified tech ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector

AMEDEE 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:

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)

Chevy Technician

15,756 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,642 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,884 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,953 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,836 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
Chevrolet Trailblazer: I have a 2009 Chevrolet trailblazer.
I have a 2009 Chevrolet trailblazer. I had the battery & Alternator replaced recently. about two weeks ago. When I drove the vehicle for about 15 minutes the volt meter in the car started to show a di… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet Equinox LS: I have a Chevy 2007 Equinox. The last
I have a Chevy 2007 Equinox. The last two mornings the battery was completely dead. A diagnostic says there is a constant draw on the battery. I have now lost my radio power as well...totally dead. Th… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet Tahoe 4x4: ON my 3rd alternator in one year.
ON my 3rd alternator in one year. Battery dead. alternator eating it up. is there a generator? Ground wire?… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet Equinox LT: Hi, I am having issues with my 2007 chevy
Hi, I am having issues with my 2007 chevy equinox battery going dead. Replaced battery 3-4 months ago. I went to start with that battery back in mid Dec. Stone dead. I called AAA for jump. They diagno… read more
Tim&#039;s Auto Repair
Tim's Auto Repair
mechanic
High School or GED
8,884 satisfied customers
Chevrolet Tahoe: I own an 04 Tahoe with a factory installed
I own an '04 Tahoe with a factory installed Bose sound system. Bout 3 years ago I exchanged the factory radio with a 3rd party radio. 6 months ago my radio stopped working, completely. I took the car … read more
rodcuda
rodcuda
Auto repair pro, 30 years experience
Associate Degree
74 satisfied customers
Chevrolet Tahoe 4x4: I have a 1997 Chevy Tahoe V8 Gas. A few
I have a 1997 Chevy Tahoe V8 Gas. A few months ago I noticed the battery would not hold a charge so I replaced the alternator and it worked fine up until last week when I went to start it, it had juic… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I have a 2000 astro van. The battery drain overnight. I'm
I have a 2000 astro van. The battery drain overnight. I'm doing a draw test and have a drain of 2.03 amps. I take off the fuses and relays 1 at a time and never drop, but if a take out the alternator … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
2004 chevrolet: Z71..a new battery and new alternator on this truck
I have a 2004 chevrolet silverado Z71. I have placed a new battery and new alternator on this truck about a month ago. now when i go outside to start it. it wont start. i will have to jump it off ever… read more
Eric
Eric
GM service dept Shop Foreman/Lead Tech
High School or GED
615 satisfied customers
2001 chevy tahoe: BATTERY PROBLEM..I took the car to the dealership
ELECTRICAL DISCHARGE /BATTERY PROBLEM My 2001 chevy tahoe continues to have an electrical discharge problem. After my question to you I took the car to the dealership. They checked the battery and it … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
2004 chevy tahoe: new battery, alternator..seat heaters quit working
2004 chevy tahoe dead battery issues My tahoe has a dead battery if i let it sit over night i have a new battery, alternator and there are no lights on in the dash. it isn't even throwing any kind of … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
Battery: 11.98VVoltage between lug on Alternator & +Battery
I saw a questioned you answered about a question about year ago, and I seem to be having a similar problem. Voltage across battery: 11.98V Voltage between lug on Alternator & +Battery: .0125V Voltage … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
2005 yukon denali: amp..volts..meter..12v (cigarette) power outlets
2005 yukon denali with the 145 (kw1) amp alternator......voltage fluctuates between 11.5 to about 14.5 volts indicated. output meter verify's these readings. flux is not constant but does move several… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
2003 Chevrolet Tahoe: horn..lock button..the alarm has disengaged
When I try to start my 2003 Chevrolet Tahoe the horn just honks, much like it does if I have my foot off of the brake. I have to hit the un-lock button on my remote several times and then I can HOPE t… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
2004 Chevy trailblazer: blow..vents..Autozone, test sid alternator
2004 Chevy trailblazer, died, was jump started, next day died again, jump started, got a new battery put in at Walmart, died again, all of their checks found no problem, A/C wont blow out upper vents … read more
frank
frank
Vocational, Technical or Trade Scho
1,892 satisfied customers
tahoe: is the battery light keeps coming on..dealers..faulty wire
the problem that i am having with my tahoe is the battery light keeps coming on. i have been to several dealers to diagnose what the problem is. many have said they couldn't find a problem, however, t… read more
Matt J
Matt J
Owner of Jones Automotive
Vocational, Technical or Trade Scho
1,000 satisfied customers
2001 chevy tahoe: cuts..off and the steering system locks..alternator
I own a 2001 chevy tahoe and it has a tendency to go dead or just cut off while sitting in traffic but mainly it really cuts off and the steering system locks whenever I make a turn. My husband says i… read more
Bob
Bob
Vocational, Technical or Trade Scho
2,784 satisfied customers
1979 chevy monza: Chevy 350..the intake manifold..Distributer..timing
I have a 1979 Chev Monza with a 1971 Chevy 350 in it. Yesterday I replaced the intake manifold after painting it and re installed the MSD Pro billet Distributer. Hooked up all the wires and reset the … read more
frank
frank
Vocational, Technical or Trade Scho
1,892 satisfied customers
Tahoe: when i jumped it it came on but as soon as i let off the gas
My Tahoe will not start it''s like the battery is dead but it''s green. when i jumped it it came on but as soon as i let off the gas it goes off. and then it ticks… read more
Scott K
Scott K
Automotive Instructor
Vocational, Technical or Trade Scho
1,330 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