There are 2 or 4, they are in the exhaust pipe directly behind the engine.
A 1999 Durango does not have any part called a GPS sensor.
The one in the top of the rear axle.
What causes ticking, check engine light, and the check gauges sensor to come on in a 1999 Dodge Durango 5.2L SUV?
No.
It is the four wire sensor on the valve body inside the transmission pan.
No.
With another Headlight Assembly that is made for a 1999 Dodge Durango.
Yes it could.
It is on the passenger side of the valve body, inside the transmission.
No, a 1999 Dodge does not have a reset button.
Yes.
take it to a Chevy dealer, leave it and drive away with a new GM sensor, vehicle included