Why is my 2003 chevy tracker smoking from front and back and overheating.

Hello, I suspect a bad bead gasket immediately. Pull the dipstick and see if there is any light, creamy substance on the dipstick. This would be engine coolant making its way to the oil pan. Do not drive the vehicle, and get the vehicle serviced and diagnosed ASAP. If you need further assistance, let me know, otherwise, here is a list of certified shops in your area that can diagnose and repair your vehicle: http://repairpal.com/chevrolet-within-10-miles-of-cincinnati-ohio-45205