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GMC Sierra 6.2 V8 403hp

2008 - 2013

403 Original HP
425 Modified HP
565 Original NM
585 Modified NM
Print Certificate
GMC Sierra

GMC Sierra 2008 - 2013 6.2 V8 403hp

Key Specifications

Generazione 2008 - 2013
Carburante Petrol
Power 403 → 425 hp +22 hp
Torque 565 → 585 Nm +20 Nm
Power
425 HP
+22 HP (+5.5%)
Original 403 HP
Stage 1 425 HP
Torque
585 NM
+20 NM (+3.5%)
Original 565 NM
Stage 1 585 NM

Power Graph

Original Power 403HP
Original Torque 565Nm
Power After Remap 425HP
Torque After Remap 585Nm

Discover Our Tuning Solutions

Frequently Asked Questions - GMC Sierra

The cost of Stage 1 tuning for GMC Sierra 6.2 V8 403hp varies depending on the ECU and specific requirements. Contact us for a free personalized quote.

Stage 1 tuning for GMC Sierra typically takes 1-2 hours of work. Time may vary depending on the ECU type.

Yes, our Stage 1 tunes are developed respecting the engine's safety margins. The power increase from 403 to 425 HP (+5%) is within safe parameters.

With Stage 1 tuning, GMC Sierra goes from 403 HP to 425 HP (+22 HP) and from 565 Nm to 585 Nm (+20 Nm).

Stage 1 remapping takes it from 403 HP to 425 HP (+22 HP, +5%) and torque from 565 Nm to 585 Nm (+20 Nm). These figures refer to the standard engine, with no hardware modifications.

A remap changes the factory calibration, so on a vehicle still under manufacturer warranty it may affect coverage on powertrain components. Performance tuning keeps all emission systems working; deactivating emission devices such as DPF, EGR or AdBlue is not road-legal in the EU and UK and is intended for off-road, motorsport or export use only.

With a normal driving style consumption usually stays the same or drops slightly: the extra torque at low rpm means less throttle for the same speed. Consumption goes up only if you actually use the additional power.

Yes. The original file is read and stored before any modification, so the vehicle can be returned to the factory calibration at any time.

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GMC
GMC Sierra 6.2 V8 403hp
+22 HP
425 HP