There are several ways to attempt a "reset," each with a slightly different effect:
* Disconnect the battery: This is the most common and often effective method. Disconnect the negative (-) terminal of the battery for at least 30 minutes (some recommend up to an hour or even overnight). This allows the PCM's memory to clear. Reconnect the battery and let the Blazer run for a while to allow the system to relearn. This often resolves minor issues caused by glitches in the system.
* Fuse pull (less common and potentially more risky): Some older vehicles had a specific fuse that, when pulled, would reset the PCM. This is *not* a standard method for a 1995 Blazer and could potentially cause damage if done incorrectly. Do not attempt this unless you have a very specific reason, and ideally, a wiring diagram.
* Scanner reset (requires specialized tools): A professional-grade OBD-II scanner can sometimes offer options to clear trouble codes and reset various modules. This is only necessary if you've already identified specific codes.
Important Considerations:
* Check the reason for wanting to reset: Before attempting a reset, identify the problem you're trying to solve. A reset might not fix every issue. A persistent problem may require professional diagnosis and repair.
* Safety first: Always disconnect the negative battery terminal first to avoid accidental shorts.
* Professional help: If you are uncomfortable working on your vehicle's electrical system, it's best to seek the help of a qualified mechanic.
In short, the most reliable and safest method to attempt a "computer reset" on your 1995 Chevy Blazer is to disconnect the negative battery terminal for at least 30 minutes.
