GMC Sierra HD (2500 / 3500) GMT800 HD

GMT800-HD 2001 – 2007 pickup 5 engines

Engines

Engines
Engine	Code	Fuel	cc	kW	hp	Nm	Years	ECU / TCU	Stage 1
6.6 Duramax LB7 300	LB7	Diesel	6 599	224	300	705	2001 – 2004	Allison1000	380 hp · 900 Nm
6.6 Duramax LLY 310	LLY	Diesel	6 599	231	310	827	2004 – 2005	Allison1000	400 hp · 1000 Nm
6.6 Duramax LBZ 360	LBZ	Diesel	6 599	268	360	881	2006 – 2007	Allison1000	450 hp · 1080 Nm
6.0 V8 Vortec 300	LQ4	Petrol	5 967	224	300	488	2001 – 2007	GM4L80-E	—
8.1 V8 Vortec 340	L18	Petrol	8 128	254	340	610	2001 – 2007	Allison1000	—

Figures are typical factory values; the ECU/TCU depends on the exact production date and market. Always identify the unit from the original read before ordering.