How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Ted G. Your Own Question

Ted G.
Ted G., ASE Certified Technician
Category: Chevy
Satisfied Customers: 5995
Experience:  20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
7183013
Type Your Chevy Question Here...
Ted G. is online now
A new question is answered every 9 seconds

I have a 2007 Chevrolet 2500hd duramax and the batteries will

Resolved Question:

I have a 2007 Chevrolet 2500hd duramax and the batteries will not stay charge. If I charge them up and drive it it will last but if you let it set in the yard for about a day the batteries are dead. I have installed three sets of batteries and it still does it can you help me.
Submitted: 5 years ago.
Category: Chevy
Expert:  Ted G. replied 5 years ago.
You have a parasitic draw on the electrical system. This means there is too much current being drawn even when the truck is turned off. It is a fairly easy test to check it. An ammeter is installed between the battery and the cable and draw is measured. if it is more than 100mA (50 is better) then you start pulling fuses until the drain drops below spec, whatever is on that fuse is the failed part. Usually it is a module or electronic device not powering down when turned off.
Customer: replied 5 years ago.
The truck is dead now do I need to charge it and get to crank and then do this. I am not much of a mechanic but I can follow your lead. The truck should be off after it is charged.
Expert:  Ted G. replied 5 years ago.
It just needs enough battery voltage to run the accessories so an hour or so of charge will do it. Turn everything off, disconnect one terminal (usually positive) from the battery and put an ammeter in between the cable end and the battery so all current is pulled through the ammeter. Make sure the doors are all closed too. Occasionally it can be something stupid like a glove box light.
Customer: replied 5 years ago.
Called the mechanic and he said he all ready did that and the ma was good.
Expert:  Ted G. replied 5 years ago.
If you are killing batteries overnight there has to be a drain. It is possible it is intermittent and didn't show up originally. Occasionally we have seen modules re-awaken after sitting for a while. (Land Rovers do it when a plane flies too close, better not live near an airport LOL) What you may need to do is set it up for the test and leave it be over a day, checking regularly throughout the day. If suddenly the meter jumps up, you are ready to start diagnosing.
Ted G., ASE Certified Technician
Category: Chevy
Satisfied Customers: 5995
Experience: 20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
Ted G. and 4 other Chevy Specialists are ready to help you

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 L Rochester NY
< Previous | Next >
  • 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 L Rochester 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!!!! Alex Los 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. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, 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. Esther Woodstock, 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. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • GM Tech (Cam)

    Chevy Technician

    Satisfied Customers:

    14730
    GM Grand Master Technician 2007. 14 years experience.
< Last | Next >
  • http://ww2.justanswer.com/uploads/BL/Bluegorilla/2012-6-21_16298_cam.64x64.JPG GM Tech (Cam)'s Avatar

    GM Tech (Cam)

    Chevy Technician

    Satisfied Customers:

    14730
    GM Grand Master Technician 2007. 14 years experience.
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    8229
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    Chevy Technician

    Satisfied Customers:

    7231
    15 years GM master tech
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    6984
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    Master A.S.E Automotive technician

    Satisfied Customers:

    4071
    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • http://ww2.justanswer.com/uploads/MO/molurch/2012-6-6_214526_500.64x64.png Don 'Mo Lurch''s Avatar

    Don 'Mo Lurch'

    Auto Mech / Electronics

    Satisfied Customers:

    2612
    Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.
  • http://ww2.justanswer.com/uploads/RO/rodcuda/2011-7-25_224114_Donhoff1.64x64.JPG Neal's Avatar

    Neal

    Chevy Mechanic

    Satisfied Customers:

    2313
    Shop Owner and Mechanic on multiple makes.