This is a all wheel drive truck. When turning left there is a slight grinding. on 2003 Chevrolet Silverado SS

This noise only happens when going slow in parking lots turning left.

Are the hubs releasing? You may have a hub that is remaining engaged. Are they auto or manual hubs?
This is all wheel drive SS Silverado. Don't have locking or unlocking hubs..
OK, think possible wheel bearing noise.