* Check your owner's manual: This is the best resource. It should specify the speaker sizes installed in your specific truck.
* Visually inspect the speakers: Remove the speaker grills (usually just pops off) and measure the diameter of the speaker itself. This is the most reliable method.
* Consult a parts store: Provide them with your truck's year, make, model, and trim level. They can access diagrams showing the speaker sizes.
Don't assume a certain size; the actual sizes are crucial for proper fit and performance when replacing them.
