3.0 Duramax (LM2) / 5.3i V8 (L84) / 6.2i V8 (L87) / 6.6 Duramax (L5P) / 6.6i V8 (L8T)
GMC Sierra OBD Unlock Patch
GMC Sierra OBD Unlock Patch service using AutoTuner Bench Patch compatibility, listed by model year, controller coverage, and request intake at Cedar.
OBD unlock catalog
GMC Sierra OBD unlock patches
Open the exact vehicle page to review controller coverage and request the unlock service.
2026 GMC Sierra TCU OBD Unlock Patch
3.0 Duramax (LM2) / 5.3i V8 (L84) / 6.2i V8 (L87) / 6.6 Duramax (L5P) / 6.6i V8 (L8T) · AutoTuner Bench Patch
2025 GMC Sierra TCU OBD Unlock Patch
3.0 Duramax (LM2) / 5.3i V8 (L84) / 6.2i V8 (L87) / 6.6 Duramax (L5P) / 6.6i V8 (L8T) · AutoTuner Bench Patch
2024 GMC Sierra TCU OBD Unlock Patch
3.0 Duramax (LM2) / 5.3i V8 (L84) / 6.2i V8 (L87) / 6.6 Duramax (L5P) / 6.6i V8 (L8T) · AutoTuner Bench Patch
2023 GMC Sierra TCU OBD Unlock Patch
3.0 Duramax (LM2) / 5.3i V8 (L84) / 6.2i V8 (L87) / 6.6 Duramax (L5P) / 6.6i V8 (L8T) · AutoTuner Bench Patch
2022 GMC Sierra TCU OBD Unlock Patch
3.0 Duramax (LM2) / 5.3i V8 (L84) / 6.2i V8 (L87) / 6.6 Duramax (L5P) / 6.6i V8 (L8T) · AutoTuner Bench Patch
2021 GMC Sierra TCU OBD Unlock Patch
3.0 Duramax (LM2) / 5.3i V8 (L84) / 6.2i V8 (L87) / 6.6 Duramax (L5P) / 6.6i V8 (L8T) · AutoTuner Bench Patch
2020 GMC Sierra TCU OBD Unlock Patch
3.0 Duramax (LM2) / 5.3i V8 (L84) / 6.2i V8 (L87) / 6.6 Duramax (L5P) / 6.6i V8 (L8T) · AutoTuner Bench Patch
2019 GMC Sierra TCU OBD Unlock Patch
3.0 Duramax (LM2) / 5.3i V8 (L84) / 6.2i V8 (L87) / 6.6 Duramax (L5P) / 6.6i V8 (L8T) · AutoTuner Bench Patch
ECU access coverage
GMC Sierra OBD unlock details
8 vehicle listings across 2019-2026.
Controller compatibility is confirmed from the actual ECU before service.
This service is the OBD unlock patch only; any tune is selected separately.