What size speakers front and rear in a 2000 GMC sierra?

In a 2000 GMC Sierra, the front speakers typically measure 6.5 inches, while the rear speakers are commonly 6.5 inches as well, although some models may have 4x6 inch speakers in the rear. It's advisable to check the specific trim of your vehicle, as speaker sizes can vary slightly based on the configuration. Always refer to the owner's manual or consult a professional for the most accurate information.