Liquorice

Rick, I had the headlight bulbs replaced in my 2014 around March 2015. Both blew in less than 6 months. I replaced them myself and have had no issues since. And it's a year since I did it. I put it down to too much handling of the bulb by the mechanic. But it's still $90 CDN sam :-)

Took the truck in for its second free service today. Asked them to do the headlight upgrade - didn't admit to having heard of any headlight problems. Thanks to this forum and this thread I showed them a copy of the PIT. By now I'm thinking that I'm not going to get anything sorted today. However, somebody knew about it. When I picked it up it was all sorted - 2 new bulbs (correct part #) and a BCM flash...and no charge! Thanks guys for all your hard work on this problem. Well I couldn't resist, so just took it out for a test drive in the dark. Very noticeable improvement - I LOVE THIS TRUCK!

I have a 2014 SLE Sierra. I have no noticeable noise difference between 2H / Auto / 4H I live in Canada so I've been using Auto and 4H quite a lot in the last few months. I can tell when it's in 4H but only because there is some resistance in the steering if I do tight turns. Other than that, it's almost impossible to tell unless you look at the switch. (I don't think I've ever used 4L, and probably didn't with my last truck either) Sam :-)