Could you tell me the size of the speakers in a 2018 Chevy Malibu?

The front door speakers in your 2018 Chevy Malibu have a size of 6 3/4". If they are not functioning, you should check the fuse box. To access the fuse box located under the hood of your car, you will need to open and secure the hood. On the right side of the engine compartment, there will be a black box with a visible seam. Opening this box will reveal the fuse inside. The back of the box lid will have a diagram indicating the function of each fuse. If the diagram is not on the lid, you can refer to the owner's manual for guidance. Once you identify the correct fuse, remove it by pulling it out. Check if the thin metal strip connecting the two raised sections is intact; if it is broken, the fuse needs to be replaced. If the strip is intact, the fuse is still good and can be reinserted. Replacement fuses are inexpensive, typically costing around 10 dollars.