Your car dont like you
had the same problem with 2002 montana. Removed master control switch and cleaned up electrical connections. Worked fine ever since.
it means traction control feature
The heater control valve on your Pontiac Grand Prix is located behind the kick plate, on the passenger side of the passenger compartment. The heater control valve is near the heater core box.
Check front end for play.
Its located on the right side of the vehicle underneath the dash
I have a 2000 pontiac montana. the tcs is know as traction control system. if your car is slipping a lot through water or snow, press that button and it will reduce slipping and wheel spin.
Could be low coolant, stuck thermostat, bad heater control head (if climate control)
The control module is located under the passenger seat.
The 1993 Pontiac Transport windshield wiper control module is located on the firewall in the engine compartment. The windshield wiper control module will be on the passenger side of the firewall.
The 2001 Pontiac sun fire speed control sensor is located on the front passenger wheel. The sensor can be found on the inside of the rotor.
Have you tried looking behind the center vents above the stereo?
under hood fuse panel above the battery