GMC Sierra 2008 - 2013 6.2 V8 403hp
Real standard and upgraded performance figures for the 6.2 V8 403hp engine in the GMC Sierra 2008 - 2013.
Below: measured output for the 6.2 V8 403hp in the GMC Sierra 2008 - 2013, standard vs. remapped, in both horsepower and torque.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 403 | 565 |
| Stage 1 | 425 | 585 |
| Stage 2 | 436 | 595 |
- Make
- GMC
- Model
- Sierra
- Generation
- 2008 - 2013
- Engine
- 6.2 V8 403hp
- Fuel type
- petrol
Frequently asked questions
Is Stage 1 tuning safe for the GMC Sierra 2008 - 2013 6.2 V8 403hp?
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 403hp make after tuning?
Standard output is 403 HP / 565 Nm; Stage 1 on this engine typically reaches 425 HP / 585 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a GMC Sierra 2008 - 2013 6.2 V8 403hp 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 403hp 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.