1. Engine type: The location of the crankshaft sensor may vary depending on the engine type of your 1999 Chevy Blazer. The most common engine options for that model year are the 4.3L V6 and the 5.7L V8.
2. 4.3L V6 engine: The crankshaft sensor is located on the back of the engine block, just below the distributor on the driver's side of the vehicle. It is usually held in place by two bolts.
3. 5.7L V8 engine: The crankshaft sensor is located on the driver's side of the engine block near the oil filter. It is positioned behind the flex plate and is held in place by a single bolt.
To gain better access to the crankshaft sensor, you may have to remove some parts or use extensions with your tools. Refer to the vehicle's service manual or workshop guide for specific instructions based on your exact engine type and vehicle configuration.
