With a scan tool,
No.
in the dipstick hole.
no for sure not
No
no, not from the factory
in side the transmission
99 Durango doesn't have a Heater Control Valve, It only has a thermostat
No
It is inside the fuel tank.
coolant
No Chance! the different bodies have a different number of lugs and different bolt pattern
A 1999 Durango does not have any part called a GPS sensor.