More than likely the metal is coming from the compressor. Replace the compressor along with the accumulator/receiver dryer and orifice tube/expansion valve. It is difficult to flush all of the metal out of the system but you must try. Any metal left in the system will eventually destroy the new compressor.
There is no user serviceable filter in 2004 to 2007 Chevy Malibu Maxx.
It has a permanent filer that is changed when the fuel pump is replaced.
top left side of engine. it is under a black plastic cap. You will have to unscrew the cap to get to the filter. It is a cartridge filter not a normal oil filter, you change it from the top of the engine
The 2007 Chevrolet Malibu has 16 valves.
The 2007 Chevrolet Malibu is a gas-powered vehicle.
The 2007 Chevrolet Malibu has an inline 4 engine.
The 2007 Chevrolet Malibu has a 4-speed automatic.
It didn't come with a cabin filter when it left the factory. Look behind the glove compartment door, some say there is a place for one.
The 2007 Chevrolet Malibu has double overhead cam (DOHC).
The 2007 Chevrolet Malibu's turning circle is 36 ft..
The height of the 2007 Chevrolet Malibu is 4 ft. 9.5 in. (57.5 in.).
The 2007 Chevrolet Malibu is 15 ft. 8.3 in. (188.3 in.) long.