1998 GMC Sierra

[mcbammer]

  Hoping someone can save me some troubleshooting time , My drivers side blinker doesnt work when headlamps are on , turn off headlamps and they work . passenger side works as it should .

[Dee]

Called my son, he is Super on diagnostics on all makes and models. He stated that if your on and off switch for the headlights and turn signals are all on one switch it's probably the switch.
Hope that helps.

[mcbammer]

Called my son, he is Super on diagnostics on all makes and models. He stated that if your on and off switch for the headlights and turn signals are all on one switch it's probably the switch.
Hope that helps.

  Thanks , that gives me a starting point .

[phalanx]

Called my son, he is Super on diagnostics on all makes and models. He stated that if your on and off switch for the headlights and turn signals are all on one switch it's probably the switch.
Hope that helps.

That’s where i would start also.