Gentlemen,
I have a 1999 Silverado 2500, 6.0 liter, 4x4. Recently, when I activate the left blinker, the left blinker light will not make and break, but will stay on continuously and stay that way even though the turn signal arm has returned to its neutral position. I suspect a faulty turn signal relay. Any thoughts on the matter before a buy a non returnable electrical item. Thank you.

Have you checked the bulbs? Just a guess.

Have you checked the bulbs? Just a guess.
Yes. However, I have just noticed that when the left blinker is signaling, the mileage display on the dashboard dims and gets brighter when the signal makes and breaks.

Hmm.. It could be a faulty blinker switch..that's what I would test first. Does the cruise control and wipers still work normally??

Hmm.. It could be a faulty blinker switch..that's what I would test first. Does the cruise control and wipers still work normally??
No cruise control and the wipers work normally. I will test the blinker switch. Thank you.

Gentlemen,
I have a 1999 Silverado 2500, 6.0 liter, 4x4. Recently, when I activate the left blinker, the left blinker light will not make and break, but will stay on continuously and stay that way even though the turn signal arm has returned to its neutral position. I suspect a faulty turn signal relay. Any thoughts on the matter before a buy a non returnable electrical item. Thank you.
On my 1998 all turn signals went out ,ways and all..It was the multi function switch.

I have and am dealing with the local dealership right now trying to resolve this no turn signal problem,i loose rev lights and my fuel qauntity indicator wacks out also..Any one have any ideas?THe dealership replaced the multi-function switchit works for a few days then craps out?