Your Vehicle
GMC Sierra 6.6 V8 445hp
Power and torque increase
Stage 1: software remap only, no mechanical changes, fully reversible.
Power HP
Torque Nm
Book your Stage 1 remap
499 € VAT included · pay online, the work is done at the workshop you choose
Power Graph
GMC Sierra 6.6 V8 445hp: da 445 a 500HP
Remapping GMC Sierra
MasterTuning is a leader in developing remapping for GMC. La GMC Sierra 6.6 V8 445hp può passare da 445 HP a 500 HP con un incremento di 55 HP.
The development of each remap is customized by MasterTuning.
- 100% tested and customized files guarantee
- Tested and developed on a 4x4 dyno
- Best performance, within safety margins
- Reduced fuel consumption
ECU Remapping Details GMC Sierra 6.6 V8 445hp
The GMC Sierra 6.6 V8 445hp is equipped with a diesel engine that produces 445 HP and 1234 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this GMC can achieve 500 HP (+12%) and 1350 Nm (+9%).
Our Stage 1 tuning for the Sierra 2017 -> delivers an impressive gain of +55 HP and +116 Nm, optimizing the diesel engine's performance while maintaining reliability and staying within safe parameters.
As a diesel engine, this GMC responds exceptionally well to ECU tuning. Owners typically report improved throttle response, smoother power delivery, and in many cases, better fuel efficiency under normal driving conditions.
Don't want to touch the ECU?
Rapid Dimsport add-on modules connect to the engine sensors with original connectors: they fit in a few hours and come off without a trace, leaving the factory software untouched. Useful on a leased car, one still under warranty or one you plan to sell soon. Check which ones fit your GMC Sierra.
Frequently Asked Questions - GMC Sierra
How much power can I gain from remapping my GMC Sierra?
With MasterTuning Stage 1, your GMC Sierra 6.6 V8 445hp can gain +55 HP (from 445 to 500 HP) and +116 Nm of torque. This represents a 12% increase in power.
Is ECU remapping safe for the GMC Sierra engine?
Yes, MasterTuning's remapping for the GMC Sierra 6.6 V8 445hp is developed within safe parameters. All calibrations are tested on our 4x4 dyno and stay within the mechanical limits of the engine.
Is the GMC ECU remapping reversible?
Absolutely. The original factory calibration of your GMC Sierra is always backed up before remapping. The process is 100% reversible at any time.
Will remapping affect my GMC warranty?
ECU remapping may affect your manufacturer warranty. We recommend checking your specific warranty terms. Many of our customers choose to remap after the warranty period or accept this trade-off for the significant performance gains.
Other Remaps You Might Like
Other Engines GMC Sierra 2017 ->
Similar Power GMC
Book your remap or ask for a quote
Stage 1 can be bought online and is done at the workshop you choose; for Stage 2 we send you a quote.
Stage 2 is quoted on request: write to us and we will reply with price and timing.
Request Quote on WhatsAppYour data is safe. No spam, just your quote.