,turn signal,brake 4 wqy flashers,

Asked by handyman12 Oct 07, 2018 at 09:00 AM about the 2003 GMC Sierra 1500 SLE 4WD Extended Cab SB

Question type: Maintenance & Repair

When I apply brakes and turn signal at the same time ,front and rear  left and right flash at same time. when applying brake turn signal light in mirror lights up. Lost ground????

1 Answer
34,830

charles answered 6 years ago

Do you have trailer wiring? I would check there.

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