LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 2021 >> Terrain Denali, FWD >> Repair and Diagnosis >> General Information >> Reset Procedures >> Programming And Setup >> Repair Instructions >> P29 Head-Up Display: Programming and Setup >> Reprogram ECU
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Reprogram ECU

To program a replacement or an existing ECU, perform the following procedure:

  1. Access the Service Programming System (SPS) and follow the on-screen instructions.
  2. On the SPS Supported Controllers screen, select P29 Head-Up Display - Programming and follow the on-screen instructions.
  3. At the end of programming, choose the "Clear All DTCs" function on the SPS screen.
scientia non olet · About LEMON Manuals