Electrical Issue

[Bigvern]

I have an 06 Silverado Crew 4WD 5.3L. The issue is, if its daylight no issue. Dark, photo turns on the headlights, the cruise don't work. If you use the master switch during the day, it somehow knocks out the cruise. So day time= cruise works, night= no cruise, use the master switch in the day to turn headlights on= no cruise. Only have crusie if its light out, havent touched the master switch. Dark time or touch that switch its curtains for the cruise. My understanding this issue is like their intermediate shaft clunk, its in 1000's of their vehicles. A guy at work has an 04 Sierra LB 4.3, same issue. My 06 Suburban does not have this issue. Any tips, or info is appreciated.

Edited April 4, 2021 by Bigvern

[Sharpz]

I have not experienced this issue in my 04 sierra w/ 300k on it.  If this is such a common issue, surely there is a fix on you tube.  My suggestion would be to replace the multi function switch even if with a used one and see if that fixes your issue. Because it is an electrical part most places wont take them back, so a used one might be the way to go.

[Ian Mills]

I would also check your brake light wiring and the brake light switch. Because the cruise control gets auto cancelled when the brake switch is pressed, issues with your brake lights/wiring can cause weird cruise control issues.