Right blinker & marker lights stay on all the time? Left works fine.

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I have a 1998 Chevy C2500 Suburban. Just started the other day, My right blinker and marker lights stay on all the time and the right turn indicator light on my dashboad is also on. when I use my turn signal to turn left they work fine. If I use my turn signal to turn right I here a buzz and the lights stay on. Is it the turn signal lever? I check all the bulbs, all are lighting up.