Auto diagnostics

How to Reset the Pc on a Chevrolet Avalanche 1Place the Avalanche's transmission in park and turn the ignition towards the "OFF" position.

Apply the parking brake. Turn the ignition for the "ON" position, but do not start out the engine.2Connect the scan tool's data cable for the Avalanche's 16-pin diagnostic data port beneath the dashboard on the driver's side from the vehicle.3Turn on the scan tool and navigate towards the " auto diagnostics software;PCM" menu Auto diagnostics.

Choose "Codes" after which pick the setting to clear all codes. Unplug the scan tool from the car and get started the engine.4Check to make certain that the "Service engine soon" light will not be illuminated.