Cadillac DTS windshield vent leaking rainwater into passenger side floor on Cadillac DTS

Some Cadillac DTS owners report experiencing rainwater leaking into the passenger side floor from the windshield vent due to several potential issues. These include improperly sealed windshields, particularly if the windshield has been replaced but not adequately sealed, allowing water to enter. Additionally, clogged front drains that route through the A pillars can lead to water accumulation, while blocked firewall drains, often caused by debris like pine needles, can result in water leaking onto the floor. Furthermore, issues with seals and weatherstripping around doors, windows, and sunroofs may contribute to this problem. To resolve these issues, owners are advised to inspect the windshield seal, check for clogged drains, clear debris from firewall drains, and ensure that all seals and weatherstripping are properly maintained. If the problem continues, consulting a professional for assistance is recommended.