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GMC Sierra 1999 - 2007: Engine Variants

Select an engine variant to view available tuning files and power gains.

Petrol
4.3 V6 200hp +20bhp available 4.8 V8 295hp +20bhp available 5.3 V8 295hp +20bhp available 6.0 V8 360hp +20bhp available
Diesel
6.6 Duramax 365hp +30bhp available

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