Problem with my 2000 Buick Lesabre Limited Mileage = 160,000 Engine size 3.8 GM tech = JK question = Drivers seat heater. Light comes on, on the switch. A click sound is heard under seat when switch is activated. However, the seat never heats up. Relay? Module? Heating unit?
JK: The most common thing to fail with the heated seats is one or both of the heater elements have burned through causing an open circuit. Either the seat cushion element or the seat back element. If one burns, neither will work. It would take a little testing with a volt / ohm meter to determine which one has failed.