04 keeps dying overnight

[bsims3996]

my 04 tahoe battery keeps going dead overnight. i can jump it off and its fine all day but the next morning its dead. the battery is a Optima redtop about 6 months old. the battery and the alternater test good. i've unhooked my system (amp) thinking that might have something to do with it but it still dies overnight. its beginning to piss me off, does anyone have ideas what it could be?

 

[Rivieraracing]

When you say you unhook your system, are you talking about your stereo system or the whole truck?

 

[bsims3996]

When you say you unhook your system, are you talking about your stereo system or the whole truck?

stereo system

 

[Shaggy]

Its sounds like your alt is bad.

 

[Rivieraracing]

Well if you stereo is unhooked and it's still draining the battery, then something else is staying on in your truck to drain the battery! Try unhooking everything in the truck from the battery and see if the battery still drains to rule out just a bad battery!!
Do you have any aftermarket stuff added to your truck recently? GPS, CB, ect.?

 

[bsims3996]

i have no other accesories , and the shop i took it to says nothing is wrong, the alternator test good so does the battery which is only 6 months old. its just crazy that i can jump it off, drive for 10 min, then the truck sits for 10-12 hours then it starts right up. but after that i drive for another 10 min and it sits overnight 8-10 hours and its dead.
could it be a need a bigger alternator

 

[Rivieraracing]

Might be the starter, the silonoid might be haywire!

 

[yukon23]

Sounds like a parasitic drain, Check out this website it explains how to check for one http://www.wikihow.com/Find-a-Parasitic-Battery-Drain Oh and if you dont happen to have a meter just use a test light , clip the alligator clip to the neg terminal you just disconnected and probe on the neg of the batt and pull one fuse at a time.

 

[bsims3996]

well after unhooking aftermarket amps and buying a high output alternator. finally went and bought a better multimeter since i my old one wasn't working right and i finally found a 1.98 draw, after pulling fuses found out it was the factory bose amp staying on. now the draw is .17. does anyone have any idea why its not turning off. the radio turns off when the door opens so shouldnt that turn the amp off as well. or does the power from the amp comes from a different source? just trying to get a idea before i start tracing wires down

 

[theautoman21]

Well you might have a couple dead cells in the battery which sounds more likely becuase if your driveing it during the day it will stay charged meaning that your chargeing system is working adequitley so the battery will stay hot and then after it cvools down its dead so even if it checked good which it probably was checked while hot you might not get a good reading from it and under a load anyway hope this helps