How many valves does the 2006 Chevrolet Malibu have?

The 2006 Chevrolet Malibu had either 4 valves or 8 valves per cylinder depending on the engine. There were two engine options: a 2.2L 4-cylinder (with 4 valves per cylinder) and a 3.5L V6 (with 2 valves per cylinder in the older design).

So the answer is either 4 per cylinder or 2 per cylinder (and consequently more valves total for the V6). There's no single definitive answer without knowing the specific engine.