A Miss With Blis

[Bamacommander]

My Blis system is malfunctioning , it will come on for no reason on the drivers side then go off for no reason. On the passenger side sometimes it works sometimes it doesn’t . Then it will work just fine . I only have 1500 miles on the truck. Has anyone else had any issues . I video tapped it  so I can show the service tech, because these things never malfunction when you take it in.

[AlaskaErik]

BLIS is a Ford system.  You'll get a better response on a Ford forum.

[Bamacommander]

Well, whatever GMC calls it, the lane departure system is not working properly on my Sierra. If you or anyone else have had any issues with it , I would like to know what happened and what was the fix.

[KARNUT]

Properly is subject to interpretation. The only time I use adaptive cruise is on a 2 lane. Then it’s regular cruise. Every lane keep I’ve experienced wonders. Most of the time the aides are off. Especially if there are turn lanes. 

[RAYS B4U]

If you're talking about the "Lane Keep Assist" or the "Lane Change Alert", mine was not working either. Last time in for service I had them check it, they did an update and now it works fine.

[f8l vnm]

I Agree with above , mine was acting funky and service advisor said sometimes the system can get knocked off its geometry it should be in , but its an easy fix for them.  In and out within the hour.