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
ECU access only. Performance tuning is sold separately.
GMC Sierra OBD unlock patches
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