Apr 26, 2010 · Water coming in when it rains heavily - NOW WITH PICS! ... is the inner splash shield behind the door panel. ... chance a body seam at the cowl or floor can leak ... Aug 25, 2007 · I have a 2004 lariat which had a water leak dripping from the passenger firewall through a wire harness penetrating the firewall into the cab. The water leak wasn't leaking onto the passenger floor panel, instead the water was running down behind the fuse box behind the kick panel and into the rocker panel where a wire tray of wires were located. May 01, 2017 · water leak between the inner and outer A pillar on top of the rocker causing wet floor/carpet. NHTSA ID Number: 10135429 Manufacturer Communication Number: GCUS-3-624 Summary. 52990 – Service Update. Certain vehicles may have a condition where the body seam sealer in the plenum/cowl area is short, allowing a water leak path that runs into the driver side foot well of the vehicle. Jul 16, 2017 · I repaired a friends passenger floorboard leak on his 04 Tahoe. There is an access panel under the plastic cowl panel on the passenger side. It's a rectangular piece held with clips and it's sealed to the cowl. If the seal fails water leaks down into the blower assembly then onto the floor.