Good afternoon.
There are plugs in the floor on both sides when the floor pan is made. They may be either missing or not seated correctly.
Did the shop remove or lift the rug and check these plugs?
When it is dry outside, does it still leak water?
Has the AC system been checked to be sure the case is not leaking under the dash to the back seat area?
Roy
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Saturday, November 17th, 2018 AT 10:30 AM