Jgran

Mine goes to dealer tomorrow morning as well. Still haven’t figured out where it is coming in from but it rained here all weekend so a little tough to do the hose test on specific areas without flooding the garage. I’ll let you all know what if anything they figure out. Thanks for all your suggestions.

Thomcat, thanks for the advice. I’ll do some poking around. I know what you mean with the dealer, I figure I better diagnose the problem to tell them what to fix or I could be chasing this forever.

Everything seemed to look correct under the carpet. The upper edge of carpet didn’t feel as wet at footwell but gravity would explain that even if it was coming down the firewall. If if it was the heater core I would assume that I would smell some coolant or the water would feel “slippery” which it doesn’t. I’m thinking I will throw the hose on the roof and see what happens and try to figure if it is coming in from above.

Hey all, brand new to forum so I appreciate your help. Just got a ‘19 Sierra 3500 6 weeks ago. Took out factory carpet floormat on drivers side and found carpet and pad completely soaked. You can hear the water squish when you push down. No evidence it is coming from roof as headliner, etc. is dry. Any ideas on where the water could be coming from so I can go into dealer with at least an idea of the problem? TIA for your help!