It wasn't an impala, but I had a car that leaked and would fill the floorboard on the passenger side. It was due to a drain that was plugged with dirt, leaves, etc. that ran down from the windshield and would normally drain out under the car.
heater core is leaking.
Either the heater core is leaking, the windshield is leaking, or there is a leak around the cowl. If the water tastes sweet it is a leaking heater core.
YES.....
The Air Conditioner drainage hose on the 2004 Impala is located in the passenger side firewall. A clog can cause a musty smell, or worse.
In the Upper Fuse Block, on the passenger side, in the engine compartment...
See *Passenger's Side Instrument Panel Fuse Block* on page 5-98 of your "Owner's Manual" for details.....
The firewall (bulkhead) is thevertical piece of metal that separates the engine compartment from the passenger compartment.
Check for disconnected or broken linkage or a bad wiper transmission
On the passenger side below the headlight assembly, behind the bumper cover, accessable from the bottom.
What is the lug pattern on the 2004 impala?
Remove the radiator cap from the coolant recovery jug that is located under the hood on the passenger's side.jd
The 2004 Chevrolet Impala has 12 valves.