http://sandyblogs.com/techlink/?p=3723
After a hard rain or large amounts of melting snow, a water leak may be noticed on the front passenger floor of some 2011-2015 Cruze models. This condition may only be evident when the vehicle has been parked on an incline and may be caused by water running down the windshield, under the air inlet grille panel and entering the body air inlet of the HVAC system.
To prevent water leaking onto the front passenger floor, install an air inlet deflector over the HVAC air inlet.
First, remove the passenger-side air inlet grille panel and clean the surface around it (Fig. 9) where it will contact the air inlet deflector with LORD Fusor 703 Adhesion Prep/Cleaner or equivalent.
TIP: Trial fit the deflector to see where the adhesive will bond with the part.
F09 air inlet

Fig 9
Next, spray a light coat of LORD Fusor 602EZ Surface Modifier or equivalent to the panel and air inlet deflector. Allow a minimum of 10 minutes for the surface modifier to dry.
Prepare the LORD Fusor 143 Plastic Repair Adhesive or equivalent using the appropriate applicator and mixing nozzle. Apply a 1/4-inch to 3/8-inch diameter bead of adhesive above the foam around the backside of the deflector. (Fig. 10)
F10 air deflector adhesive

Fig 10
Install the deflector over the HVAC air inlet and hold it firmly in position for one minute. (Fig. 11)
TIP: Once the adhesive has been purged from the mixing nozzle, working time is about one minute. Be sure to have the deflector near the HVAC air inlet and apply the adhesive immediately for proper installation.
F11 air deflector installed

Fig 11
For more information, refer to #PI1302.