Clicking Noise From Flasher When Turn Signals are Off on GMC Sierra 2500

A clicking noise may be noted from the turn signal flasher after the turn signals are switched off.  This is commonly cause by a faulty turn signal switch which will require replacement.

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Average mileage: 131,000 (70,000–183,000)
6 model years affected: 1999, 2000, 2001, 2002, more2003, 2004
9 people reported this problem
1 person shared problem details
1999 GMC Sierra 2500140,000
Same problem. Stops clicking when brake is depressed.
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