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Michael, Auto technician
Category: Chevy
Satisfied Customers: 919
Experience:  21 years Foriegn and Domestic driveability diagnosis and repair.Fuel injection specialist.ASE Cert.
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What is the recommended OBD2 drive cycle for a 2003 chevy silverado

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Are you referring to cycles to re-learn performance strategies?
Customer: replied 10 years ago.
Reply to Michael's Post: Possibly. I am going to erase an OBD2 P0442 code (which is a possible loose gas cap - small EVAP leak). I want to know the recommended drive cycle to reset the monitors to DONE status.

OK. If you clear codes with a scanner,you should not have to do anything else because all performance strategies are maintained. If the light comes on after one trip (Described below), than there is still a problem with the EVAP leak.

Perform computer relearn procedure as follows: 1 Trip or cycle consists of
starting the vehicle and allow it to warm up. Place the vehicle in Drive with foot on brake and let idle for 1 min. Take vehicle for a drive accellerating at normal throttle position 20-50% of full throttle,until it shifts into top gear.Cruise at light to medium throttle.Decelerate to a stop allowing the vehicle to downshift and use brakes normally.Process may be repeated as necessary for the computer to relearn all performance strategies.May take up to 40 trips for a complete re-learn.

Michael and 5 other Chevy Specialists are ready to help you
Customer: replied 10 years ago.
Reply to Michael's Post: Thank you!!!