BHP+30 hp (8%)
Standard
365 hp
Tuned
395 hp
Torque+51 Nm (6%)
Standard
894 Nm
Tuned
945 Nm
Suitability
Moderate (5.5/10)Gains Profile
Limited headroomHeadroom
LowGMC Sierra 6.6 Duramax 365hp ECU Remapping
Considering an ECU remap for your GMC Sierra 6.6 Duramax 365hp? A Stage 1 remap can take this 2014 - 2016 diesel engine from 365 BHP to 395 BHP and from 894 Nm to 945 Nm of torque (turbocharged). This engine scores 5.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your GMC Sierra can achieve.
How this engine compares
- 2ndof 21 GMC Sierra engines by power gain
- 39%of the 9,842 engines we hold gain data for see a smaller power increase
- 38%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
The GMC Sierra 6.6 Duramax 365hp is a 6.6L turbocharged diesel engine producing 365 BHP and 894 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 395 BHP and 945 Nm — a gain of around 30 BHP (8%) and 51 Nm (6%).
This engine has moderate remap suitability, though the available headroom is limited, so gains are modest compared to higher-output variants. The tuning headroom is classified as limited, based on the percentage gain available from the factory output.
Considerations: High tuned torque: check transmission torque capacity and service history.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
Considerations
!High tuned torque: check transmission torque capacity and service history.
Other Sierra 2014 - 2016 Engines
| Engine | BHP | Gain | Torque | Gain |
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