How do I reset my 2002 chevy trailblazer computer?

To reset the computer on the 2002 Chevy TrailBlazer place the ignition to the on position and then press the accelerator three times quickly in a row.But why is a cars computer so important You may be asking Yourself. Well today's cars use information from the computer to identify problems. For instance, the warning light, brake light, or engine light lights up when the computer detects a problem. This is why car computer scanning is gaining importance. This alerts the driver and makes it easier to figure out what/where the problem is. But how much will a replacement computer cost. Well depending on Your make and model, the computer itself will run anywhere from $100 to $1,000. Most of them are located underneath the dashboard inside the cabin of the vehicle.