GMC Sierra - 6.6d L5P and L5D
2 ECUs found for this engine. Select an ECU to view available tuning services and pricing.
GMC Sierra 6.6d L5P and L5D Engine Specifications
GMC Sierra 6.6d L5P and L5D Stage 1 Chiptuning Results
| Variant | Original HP | Tuned HP | +HP | Original Nm | Tuned Nm | +Nm |
|---|---|---|---|---|---|---|
| 6.6 Duramax 365hp | 365 | 395 | +30 | 894 | 945 | +51 |
| 6.6 V8 445hp | 445 | 500 | +55 | 1234 | 1350 | +116 |
GMC Sierra 6.6d L5P and L5D: Before this file is prepared
For the GMC Sierra 6.6d L5P and L5D, the uploaded file is the final reference. We check whether it is original or already modified before preparing the order, and we contact you first if the read or selected service does not match the vehicle data.
- Upload a complete original ECU read from the tool you used, or a TCU read only when the selected service is gearbox tuning.
- Add the vehicle year, gearbox, read/write tool and any dashboard or diagnostic symptoms.
- Select only the services that match the actual vehicle hardware and intended legal use.
Other Sierra Engines
GMC Sierra 6.6d L5P and L5D Frequently Asked Questions
- What tuning services are available for the GMC Sierra 6.6d L5P and L5D?
- WEREMAP offers 28 tuning services across 2 ECU variants for the GMC Sierra 6.6d L5P and L5D.
- How much does ECU tuning cost for a GMC Sierra?
- ECU tuning prices for the GMC Sierra 6.6d L5P and L5D range from 50 to 600 credits, depending on the ECU variant and tuning service selected.
- What ECU does the GMC Sierra 6.6d L5P and L5D use?
- The GMC Sierra 6.6d L5P and L5D is available with the following ECU variants: Delphi ACDelco E41, Delphi ACDelco E42. WEREMAP provides professional tuning files for all of these.
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