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How you can Reset the PCM on a Chevy 1Shift the vehicle's transmission into park (automatic) or first gear (manual transmission). Turn off the engine, then rotate the ignition back for the "ON" position, but don't commence the engine.

2Connect the scan tool's information communication cable to the vehicle's diagnostic information port underneath the dashboard, above the foot properly region.3Power on the scan tool and adhere to the on-screen prompts to enter the vehicle's particular powertrain data auto diagnostics software.

Pick "PCM" from the scan tool's main menu.4Select "codes," then choose "clear all present and stored codes." Wait for the scan tool to confirm that the codes are cleared Obd2 scanner.5Start the engine and confirm that the SES light doesn't illuminate. The PCM is now reset.