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?

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.
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