Changing the Front Parking or Turn Signal Bulb Open ... and should be PN 3157NA LL or PN 4157NA LL Amber Bulb. Parking light and turn signal socket inspection. See All 4 Photos Check to see ...

To check which bulb is out, activate the turn signal for the side blinking faster and take a stroll around the car. Note that it’s possible there may be more than just the front and rear bulbs ...

The second exception is: (b) The DRL is optically combined with a lower beam headlamp and the turn signal lamp meets 2.5 times the base front turn signal photometric requirements This means that ...

The problem: the front turn signal lamps of affected 2024 GMC Sierra EV trucks may not differ enough in brightness (photometric intensity ratio) from the parking lamps, making it difficult for ...