LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1999 >> Envoy >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Modules >> Programming >> BCM Relearn Procedure >> Without Scan Tool
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Without Scan Tool

  1. Turn ignition off. Replace failed/affected component.
  2. Turn ignition switch to RUN position, then to CRANK position (without starting engine), then back to RUN position.
  3. Observe SECURITY indicator light on dash for 10 minutes. After 10 minutes, indicator light will transition from on to off.
  4. Repeat steps 2)  and 3)  two more times. After successfully completing 3 consecutive cycles of ignition switch, vehicle will learn the new component on the next ignition cycle, which is from OFF to CRANK then to RUN position. Engine should start.
  5. After performing relearn procedures, clear DTCs. See RETRIEVING & CLEARING DTCS  under SELF-DIAGNOSTICS.
scientia non olet · About LEMON Manuals