Drained battery after two days of siting

We own a 2004 Chevy Venture LT. We bought it used from private owner 2 weeks ago. Owner disclosed that battery would go dead after sitting for several days. It has started daily but the battery seemed very low. Took to Advance and had battery checked. It checked OK and alt was producing 14.3 V. When leaving it wouldn't start. PUt on charger for 15 min, reinstalled and engine fired right up. Today, it was low again and then wouldn't start after church. Had to jump. The battery is a fairly new interstate. Any ideas of what could be draining the battery? No warning lights are on. No interior lights are on after doors close. Could starter be drawing amps when ignition off?

I have this exact problem with my 04 Venture. I have not tested this theory, but I think it has to do with the built in alarm system. I am going to disable the alarm and see if this problem continues.

The reason I believe this is an alarm system problem is because I use to have a 99' Montana and when I bought it used the previous owner was a sales man from a Ford/Dodge dealer. Now this guy knew cars, because he went out and bought the service manuals for this Montana and he had this same problem with it. He told me that he disconnected the alarm system (which was aftermarket) and the problem stopped.

Now one would think that Chevy would have figured out any problems with the alarm draining the battery, but this is Chevy we are talking about. They have been screwing consumers for years by making the cheapest crappiest cars ever made. The only reason I bought the Montana and Venture are because they were $1000s under blue book.

I will try to post back here with my results of my alarm disable test.

Ps. If you are ever going to buy American buy Ford! They are probably the best value vehicles out there today.

Starter motor clicked when bridged, but no power at all, volt tested battery and checked resistence on connections and cables. All fine. I don't think it is the starter, but wondering about sloenoid on starter. But is this reason to ground out and disallow all electrical current elsewhere? Dead with full battery even when extra volts added through a engine start mode from a battery charger. Thanks, Swain

Did anyone answer?

Having an identical problem with my 2002 Venture. There is a parasitic current draw of 4.5 amps when the ignition is off. I've eliminated the alternator. Hopefully its a faulty solenoid on the starter motor.

I have been and the shop have been thought this van. It is dead in 2 to 3 day if not started. In two year replaced battery two times. Went thought it good, but not good enough. Under hood relay 16 and 11 get hot after driving it. The 3 shop I took it too say that I have a draw of 5.2 amps to 7.8 amps draw. They say that it was within rang. But if take out fuse 29, 8 and 7 I have no draw on the battery, as I add the fuse back I get an draw fuse 29 is a little draw, then 7 draw, then 8 is the biggest draw.? My head is hurting

Will it be at a ground or will it be at positive. Would it be one item that cause this?

The one that give me the most draw under hood is 60amp number 8,
IGN MAIN 2 Ignition.

If hit a pot hole real hard, my 2 of my panel light goes out( it over the temp gauge). Should I start looking at the wires in my dash?

The battery is brand new and the alternator is used. But the battery dies. After the car is shut off. What is it electrical or alternator?

OK I will check the ones with the arrow. Thanks

I have a 97 chevy venture van, the battery will only stay charged for a few minutes. It wont take a jump and only stays charged when I take it to the auto parts store and then it stays charged for like 30-45 min. And then it dies again. I have a new 104 amp alternator and my battery is 650 amp, and every time I take it to the auto parts store they say that either the voltage is low or it is the amps. Please help this is trying my husband crazy