'99 Chevy Silverado 1500 Part out

Parting out a '99 Silverado. 5.3L, 4L60E, black cloth interior. I bought the truck to part out not running. The starter won't engage because of the security system has an electrical issue & the previous owner was told that it will probably need a new computer. I have sold some parts off the truck already but most of the truck is still there. Body is complete beat up & hailed out. I don't know what condition the motor or transmission are in or how many miles on them. If you need something just ask me & I'll let you know if it's there.