It appears with GM's daytime running light safety BS, they want you to change the headlights every 2-3 months, which in the older models would not be such a bad thing because the older models gave you easy access to change the bulbs. NOT the new vehicles. The access to the bulbs is through the front wheel wells and anyone not mechanically inclinded will cost you big bucks to have a dealer do it every 3 months. Even when replacing bulbs together, they go, and go and go. I have spoken with other GM owners who have the same year truck and others, This is a major Issue for this vehicle as well as many of the new ones. One small step I will be looking at when I buy my next vehicle from a different manufacturer. Very disappointed in GM.

Ok, this is the 3rd bulb in the passenger side low beam. I'm sure the drivers side will blow very soon as it did before. I've had two low beams go out on both sides. Four bulbs consumed so far.

And I found the issue. These Sylvania H11 bulbs halve a life expectancy of 230 hrs. Really!!! The old style 9005/6 had a life exp. of 1000 or better! That's 13k mi at 60mph.Average in city and other and your probably down to 10K. Then factor in daytime running lights and your changing your headlamps constantly! It is also irritating that GM would use these. And if you get the Silverstar bulbs they have a life expectancy of about 125 hrs! Looks like I'm converting to LED!