GMC Sierra 2017 -> 6.2 V8 420hp
Real standard and upgraded performance figures for the 6.2 V8 420hp engine in the GMC Sierra 2017 ->.
These are real standard and Stage 1 (and where available, Stage 2) figures for the GMC Sierra 2017 -> 6.2 V8 420hp — not a generic estimate for the model range.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 420 | 609 |
| Stage 1 | 440 | 630 |
| Stage 2 | 450 | 640 |
- Make
- GMC
- Model
- Sierra
- Generation
- 2017 ->
- Engine
- 6.2 V8 420hp
- Fuel type
- petrol
Frequently asked questions
Is Stage 1 tuning safe for the GMC Sierra 2017 -> 6.2 V8 420hp?
Yes — Stage 1 for this engine is a software-only remap calibrated to stay within its stock mechanical limits (turbo, clutch, fueling), so no hardware changes are required.
How much more power does the 6.2 V8 420hp make after tuning?
Standard output is 420 HP / 609 Nm; Stage 1 on this engine typically reaches 440 HP / 630 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a GMC Sierra 2017 -> 6.2 V8 420hp remap take?
Once your original file is uploaded through the member panel, most requests for this engine are completed within a few hours.
Can the 6.2 V8 420hp be reverted to its original file?
Yes — we keep the original file on record for the request, so the ECU can be put back to stock at any time.