* If you're talking about resetting the onboard computer (the PCM, or Powertrain Control Module): There's no user-accessible reset button. Disconnecting the battery's negative terminal for a few minutes will often clear temporary faults stored in the PCM's memory. This is sometimes called a "hard reset." However, this will also reset your radio presets and possibly your clock. After reconnecting, the car may run a self-diagnostic, which might take a few minutes.
* If you're experiencing a specific problem (e.g., a malfunctioning system): A "reset" isn't the solution. You need to diagnose the issue. This could involve checking fuses, having the car's diagnostic trouble codes (DTCs) read using an OBD-II scanner, or taking it to a mechanic.
* If you mean resetting the radio presets: Your car's radio manual will explain how to do this. It usually involves holding down certain buttons for a few seconds.
* If you're experiencing a software glitch in a specific system (like the navigation if equipped): The solution will depend on the specific system. You might need to consult your owner's manual or a Cadillac service center.
In short: Unless you mean resetting something specific like the radio, simply disconnecting the battery's negative terminal for a few minutes is the closest equivalent to a "computer reset" for your car's onboard systems. However, be aware of the potential consequences. For most problems, you'll need to diagnose the issue rather than resorting to a generic reset.
