This is a 5.7 L V8. I have only had it a few months. It has 94000 miles and apparently was well maintained. Nice truck. My problem is my battery is drained down to nothing after a couple of days of non use. Put a new battery in it started fine. First time I tried to start it after it set for a day I could tell it seemed a little sluggish, but still started. This past week it set for three days. Went to start it and didn't even get a click. Battery dead as can be. Did have enough juice to barely turn on the dome light. Any one know of anything I could check before I have the electrical checked out..$$. It has power everything, locks, doors, windows. Someone has provided wiring for trailer light hook up. Nothing special... any help???
Make sure, if you have a engine reel light under the hood, that it is turned off.
Check the alternator, this is one of the trucks weak points.
Alternator.
Does it have keyless entry? My keyless entry module went out which caused a large draw... something like 30 amps... which was enough to drain the battery overnight and prevent subsequent charging. Have that checked out.
Check the reel light and also check and see if the light, that turns on and off when the hood is opened and closed, turns off. I have a suburban that did that.
A slow battery drawndown occurred in my '79 Malibu a couple of years ago leaving me w/dead batteries. Before it happened, the horn sounded one day for no reason, so I pulled the horn wires to silence them, and subsequently forgot about the problem.
Anyway I needed a horn for state inspection and trouble shooted it back to a bad horn relay. Since the car was over 20 years old, the relay plastic cover had collapsed and shorted the wires inside. I replaced relay for $8 & since the horn worked for inspection & the battery slow drawdown stopped. Good luck.
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