2000 LS 5.3 was either 2WD (rear) or AWD (AutoTrac).
AutoTrac is default rear wheel drive and if it senses slipping it engages front axle. You don't get to control it, it decides for you, and burns out clutch for you.
Precursor to Stabilitrak which was not introduced til 2003.
Push button selectors came on the Z71 model with lockers.
Post VIN if you want more details on your truck we will all decode it for you
AutoTrac is default rear wheel drive and if it senses slipping it engages front axle. You don't get to control it, it decides for you, and burns out clutch for you.
Precursor to Stabilitrak which was not introduced til 2003.
Push button selectors came on the Z71 model with lockers.
Post VIN if you want more details on your truck we will all decode it for you