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6.0 V8 (301 Hp) Automatic CNG 6.0 V8 (360 Hp) 4WD Automatic 6.0 V8 (360 Hp) Automatic 6.6 Duramax TD V8 (397 Hp) 4WD Automatic 6.6 Duramax TD V8 (397 Hp) Automatic 6.6 Duramax TD V8 (445 Hp) 4WD Automatic 6.6 Duramax TD V8 (445 Hp) Automatic
