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2003 chevy 1500 battery slow drain

Unit has a slow drain on battery. drains faster in colder weather. new battery last year, new alternator this year.

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Posted on Jan 02, 2017

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SOURCE: Chevy Malibu Check Battery Light

The battery light in my 1998 malibu just came on the other day. The serpentine belt lookd new... The car starts right up.... Can I ignore this light?

Posted on Feb 11, 2009

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SOURCE: 1998 Corvette drains the battery in less than 2 days.

No, corrosion will not cause a battery to drain, even if the corrosion is on the terminals. Several factors can cause battery drain, I would first have the battery tested to see if the battery it self is not bad. If the battery is good, then the most common is a short. All most all new cars have a certain amount of drain,(measured in milivolts) this drain is for clocks and computer memory's, and it would take several days of a vehicle sitting for the battery to be drained. Don't immediately assume you have a problem if you see 2-6 milivolts of drain on a battery with the key out, now if your battery is being drained after being parked over night, you have a problem. The easiest way to pin down the problem short is to disconnect your positive battery cable from the battery, take a 12 volt test light and clamp one end to the positive cable, and hold the probe to the positive post. Now if you have a short the light will come on. Have someone help you by pulling the fuses one at a time. If when a fuse is pulled the light goes out you have isolated the short to that system. If you pulled all the fuses and the light never went out try disconnecting all the wires from the alternator, 9 times outta 10 do this will let you know where your short is. If the system is not critical like power locks some people just leave the fuse out. 

Posted on Mar 05, 2009

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SOURCE: 2001 chevy silverado 1500 v8 battery drain after sits for 1or2day

, do a simple test on the charging system...check battery voltage. should be 12v or better. start engine & check volts at idle, no accessories on. volts should read 13.5 -14v. Turn on all accessories(including headlamps on high) volts should drop slightly but should not creep down. Definitely not below 12.5. If voltage drops lower than 12.5, the regulator (in the alternator) is not working. either change regulator or change entire alternator. Alternator drive belt should have sufficient tension so that alternator cannot be turned easily by hand. If it can, check belt tensioner.

Posted on Mar 18, 2009

jmgldsmth
  • 1889 Answers

SOURCE: 1997 chevy lumina battery problem.

the problem with your car is: a battery "leak" to ground (like leaving the dome light on all night)
The way to fix this is: buy a testlight at an autoparts store it will look like an ice pick with a bulb inside, then: with your battery fully charged remove the black (-) negative battery cable and connext the testlight between the cable and, the battery post (clamp
to cable end then:spike to post make sure they dion't touch the car's metal parts now make sure all the accessories are off and,all doors closed etc.next pull fuses until the testlight goes off you have then found your problem area, replace the fuse that you removed and, look in your owner's manual and, identify what electric devices are on that fuse's circuit i.e. glovebox lamp, trunk lamp, lighter; etc. then just remove each item from the circuit until the testlight goes off this is will have been your problem remember that a bad lamp does not need to glow to be "on" also any tiny vs. bright glow on the testlight will indicate by how much the problem device is draining your battery



Posted on Apr 26, 2009

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1 Answer

My rear wiper on my 2003 chevy suburban 1500 stoped working and my battery is being drained


Hello the wiper motor axel is stucked by rust and the hole viper motor must be changed or renewed with a used/better one.

To prevent the battery from draining remove the multiplug connector from the rear viper engine.
(Remember to remove the negative cable from the battery)

When the viper motor is stucked the power circuit can`t close in position and this is why your battery is being drained for power.

Hope this will help you

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The battery light comes on when there is an issue with the charging system. Most likley you have a bad alternator. With the engine running you should see a min. of 13.5 volts at the battery and better yet 14+ volts. If you have 12.5 or less than the alternator is not charging.

Once the vehicle is started the battery is no longer in play. The alternator is what keeps the power supply to the vehicle and recharges the battery for the next time you want to start the vehicle. Once battery voltage drops below 9 volts or so systems start to shut down. Eventually the battery will drain enough that the engine management system can no longer function and the vehicle will stall.

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Have the alternator checked. An open diode will drain the battery

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I would first have the alternator checked by an auto electrician to ensure it is working correctly and is providing the correct volume of current. It may be faulty and when driving you will be drawing battery power instead of power from the alternator to run the electrics. This will drain the battery.

Alternators do not last forever and if you are still running the original unit it is likely to be on it's last legs and you will need a replacement unit.

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One year old battery kept dying. It tested bad and


There is some things to check....

(1) Is your alternator charging? take your vehicle to Advanced Autos, Napa or someone like that and have them test your alternator.
(2) Is there something in the vehicle causing excessive drain on the battery when the motor is not running... like is the interior light may be on or something to that affect.
(3) Are you doing enough driving to recharge your battery? short stops and starts is not good for a battery as you may rob more energy from the battery then you are putting back in.
Sounds like something is draining your battery, something must be left on in the vehicle, Advanced Autos or Napa should be able to tell if something is draining your battery when the vehicle is off.

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SOUNDS LIKE AN ALTERNATOR PROBLEM THE SYSTEM IS NOT RECHARGING ITS SELF AS IT SHOULD AND THEREFORE IT IS DRAINING THE LIFE OUT OF YOUR BATTERY AND WILL EVENTUALLY KILL THE NEW BATTERY TOO.

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Battery drain overnight 2003 chevy silverado


This is a tough question but it sounds like you understand .
You posted it in 2009
I have a 96 s-10 blazer and know of the electrical problems ware one thing is related to another thing that no one would thing had any kind of relationship with the other but they do.
You have a vehicle in the years that they build junk no telling Chevy did

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Have an ongoing problem with a 2003 Suzuki Grand Vitara 2000 16v If the car isn't started every day the battery discharges ... ... !!! Once the car has been jump started and left running for 5 minutes, it...


If you jump-started it and ran it for five minutes then it started fine, it's not the alternator. I would get an ammeter and check the current drain when everything is off (as it would be when the car is locked, armed, etc). I can't remember the exact figure I was once told, but it was of the order of 0.2 Amp (200mA). More than this, and batteries start getting drained progressively faster. The last car I had with this problem turned out to have a huge amplifier (sound system) that wasn't being switched off by the ignition or the stereo unit. Don't know how much it was drawing, but a cut-out feature on the ammeter saved it from having a meltdown.

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Chevy 1500


Chek up the alternator/relay.

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