What size speakers are in a 2001 chevy blazer?

The factory specs lists the speaker sizes in the 2001 Chevy Blazer aS4x6 for corner dash speakers, 6-3/4 front door, and the rear doors have 6-1/2 size speakers. Replacing the speakers are not difficult but You may have to get a new wiring harness if there are any signs of corrosion or damage to the wires. The cost for new speakers will range depending on the brand and quality speakers You choose which will range from $50 - $200 on average. If You choose to take it to an car Audio center the price will range from $100 - $150 for repair and installation. It is best to inspect the wiring and fuses to make sure those are not the problem before takeng it to a specialist.