just got a 2023 sierra with less than 1000km on it coming in for water leak dripping from overhead console,i dropped down the headliner ,sprayed the sunroof area to test for leaks,the water was leaking between the plastic drain insert and the aluminum railing which contains no sealing of any kind.I ordered a new sunroof housing and same issue.I believe the lack of sealant/gasket between the drain area and the railing is the issue.The water drips from the 2 area circled on the picture.It does that on the passenger side as well.And the drain tubes are clear(that's the first thing i checked).
