My chevy tahoe's battery drains overnight and I had the battery checked and every thing checks out good. I also checked all the lights inside to see if one may be staying on and draining the battery but everything looks find. Any idea what could be using the power?
Is this a tahoe or a grand Prix?
What year of tahoe?any aftermarket accessories loke a remote starter or an alarm or a tv?
2004 chevy tahoe, LT
no aftermarket accessories.
I have seen issues with the a/c control head causing the battery to go dead and also the On-Star staying powered on and discharging the battery. To test, you need a Volt meter that can measure amp draws in milli amps. You then need to disconnect the negative battery cable and hook up the amp meter between the disconnected negative battery cable and the negative battery post. Using a disconnect switch is best to use.Here is a file on how to do the draw test.