Question about daytime running lights.

So my question is, which i haven't replace the passenger side daytime running light since i did it before because when i did it, it went out soon after. But what I noticed is that alot of trucks(chevy like tahoo, suburban,other silverados.) around town has their passenger daytime running light out also. I replaced my DRL's and the driver side is still good, however the passanger side will go out. However my driver side DRL has been great like always. So is there something out there about those passenger side ?

So my question is, which i haven't replace the passenger side daytime running light since i did it before because when i did it, it went out soon after. But what I noticed is that alot of trucks(chevy like tahoo, suburban,other silverados.) around town has their passenger daytime running light out also. I replaced my DRL's and the driver side is still good, however the passanger side will go out. However my driver side DRL has been great like always. So is there something out there about those passenger side ?

DRL are to be changed in pairs ! you use the new long life bulbs

4157 lamp I think ....auto zone has them about 6.oo..........

I replaced mine when I bought it 2 years ago and they are still going strong. I want one to burn out so I can go to amber bulbs.

im waiting on mine to burn out so i can put LED lights in them.