2016 Sierra SLT

I have a 16 Sierra, the high beam headlights have stopped working, this happened after installing a cold air intake, fuses are good and the indicator light on the dash comes on, any ideas?

I’m having the same issue, following

Mileage get a little better not much , it’s a truck for Pete’s sake ! I haven’t had any problems hearing after doing the muffler delete and cold air intake! I can tell the performance gains while towing and under hard acceleration!

I did the cold air intake from spectre , it has a polished aluminum tube where the k&n is plastic,muffler and flapper delete, range technology module to do away with the pesky AFM, tinted the windows and added a bedcover

As stated it’s to prevent the helicopter noise when going in to V4 mode , when I did the muffler delete on my 16 Sierra I took the flap out also.

Yes I use the Range Technology AFM disabler , I recommend this to anyone that has a truck like ours, I tow my boat and camper with my truck and do a fair bit of highway driving, I love it worth the money! Fuel economy goes up too!