The Chevy Blazer has had various configurations including:
* Two-wheel drive (2WD): Rear-wheel drive only.
* Four-wheel drive (4WD): Part-time or full-time all-wheel drive.
To get a helpful answer, you need to specify which generation of the Chevy Blazer you're asking about (e.g., the K5 Blazer, the S-10 Blazer, the newer Blazer SUV) and what aspects you want to know about (e.g., reliability, performance, fuel economy).