GMC Sierra - 6.6 V8 TD
2 ECUs found for this engine. Select an ECU to view available tuning services and pricing.
GMC Sierra 6.6 V8 TD Engine Specifications
GMC Sierra 6.6 V8 TD Stage 1 Chiptuning Results
| Variant | Original HP | Tuned HP | +HP | Original Nm | Tuned Nm | +Nm |
|---|---|---|---|---|---|---|
| 6.6 V8 365hp | 365 | 390 | +25 | 894 | 930 | +36 |
| 6.6 Duramax 365hp | 365 | 395 | +30 | 894 | 945 | +51 |
| 6.6 V8 445hp | 445 | 500 | +55 | 1234 | 1350 | +116 |
GMC Sierra 6.6 V8 TD: Before this file is prepared
For the GMC Sierra 6.6 V8 TD, 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 6.6 V8 TD Frequently Asked Questions
- What tuning services are available for the GMC Sierra 6.6 V8 TD?
- WEREMAP offers 26 tuning services across 2 ECU variants for the GMC Sierra 6.6 V8 TD.
- How much does ECU tuning cost for a GMC Sierra?
- ECU tuning prices for the GMC Sierra 6.6 V8 TD range from 50 to 280 credits, depending on the ECU variant and tuning service selected.
- What ECU does the GMC Sierra 6.6 V8 TD use?
- The GMC Sierra 6.6 V8 TD is available with the following ECU variants: Bosch EDC16C42, Bosch EDC17CP18. WEREMAP provides professional tuning files for all of these.
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