Hello,

i have changed the tail lights of my sierra denali recently, however i have noticed that after the change the turn signal blinks faster than before? actually the first 2 blinks are normal and then it becomes faster!! any idea?

note: when i run the four signals together its normal!

 

Its becuz there is a set voltage from the factory so when a bulb burns out, the voltage drops and it blinks fast to indicate something is wrong. I put L.E.D.'s in mine and left it like that. So either check them again or the power draw of them bulbs.