1999 Chevrolet Suburban M Having Suburban Had Slow Parasitic Draw

Use a digital multimeter across battery posts, vehicle off, what is the reading? The generic spec for a full charge is around 12.6 volts. You can't do any testing if the battery is down? Did you fix the amp draw?

Your saying the starter motor won't crank without a jump? Was the battery and charging system tested on the vehicle?

The battery is fully charged, took it in and had it charged. The starter, battery and alternator were all checked and the only problem was with the starter. I replaced that yesterday and am still having the same problem. The starter just clicks unless I jump the truck. The motor does not turn over without a jump. Once it's running it is totally fine. I can use the heat, radio, wipers, lights ect. without any losing any amps. I do not know what the amp draw is, only that when I first had the truck tested it was drawing 0.86 amps. I have no idea where the amp draw is.

You need to use a digital multimeter and do some voltage tests. Place the meter leads across the battery posts, have helper turn key to crank. Watch the voltage reading. What is the voltage reading? Unless you can do some testing, I'm not sure how to help?