* 4WD actuator: This is likely what you mean. The location is *under the vehicle*, near the transfer case. It's not a switch in the traditional sense, but rather a motor-driven actuator that's controlled by a switch *inside* the vehicle (usually on the center console or near the gear shift). You're unlikely to find a separate "switch" for it.
* Other actuators (e.g., blend door actuator, seat actuators): These have their own locations, and will vary significantly.
To find the 4WD actuator (the most likely candidate):
1. Consult your owner's manual: This is the best place to start. It should show a diagram of the 4WD system and may indicate the actuator's location.
2. Look underneath the vehicle: Jack up the Blazer safely and use jack stands. Look near the transfer case; the actuator will likely have wiring connected to it.
3. Online resources: Search for "1997 Chevy Blazer 4WD actuator location" on sites like YouTube or repair manuals websites (some are free, others are subscription based). Pictures and videos can be extremely helpful.
Important Note: Working under a vehicle can be dangerous. Always use jack stands, and never rely solely on a jack. If you're not comfortable working on your vehicle, take it to a qualified mechanic.
