10-Minute Learn Procedure (Avalanche, Astro, Blazer, Cab & Chassis, Chevy Express, Cutaway, Escalade, Escalade EXT, Jimmy Canadian, RV Cutaway, S10 Pickup, Safari, Savana, Savana Camper Special & Savana Special, Sierra, Silverado, Sonoma, Suburban, Tahoe, Yukon & Yukon XL)

If replacing a PCM/ECM with a GM Service Parts Operations (SPO) replacement part, after programming, these modules will learn the incoming fuel continue password immediately upon receipt of a password message. Once a password message is received, and a password is learned, a learn procedure must be performed to change this password again. A PCM which has been previously installed in another vehicle will have learned the other vehicle's fuel continue password and will require a learn procedure after programming to learn the current vehicle's password.

Use this procedure after replacing:

• Passlock™ Sensor
• Passlock™ Module.
• PCM

NOTE: Ensure current Techline® Service Programming System (SPS) software is used.
1. Connect Tech 2 scan tool to DLC.
2. Select "Request Information" under Service Programming.
3. Disconnect scan tool from vehicle and connect it to a Techline® terminal.
4. Using Techline® terminal, select "Theft Module Re-Learn" under Service Programming.
5. Disconnect scan tool 2 from Techline® terminal and connect scan tool to vehicle.
6. Turn ignition on, with engine off.
7. Select "VTD Re-Learn" under Service Programming on scan tool.
8. Attempt to start engine, then release the key to ON position. Vehicle should not start.
9. Observe SECURITY indicator light for about 10 minutes. Indicator light will turn off and vehicle is now ready to relearn Passlock™ sensor data code and/or password on the next ignition switch transition from OFF to CRANK position.
10. Turn ignition off and wait 5 seconds.
11. Start engine. If engine starts, vehicle has now learned the password.
12. Using Tech 2 scan tool, clear any DTCs.