The 4.2-liter General Motors LL8 engine was produced at the Michigan plant from 2001 to 2008 and was installed on GMT360 platform models such as the Chevrolet TrailBlazer, GMC Envoy, Saab 9-7X. This inline 6-cylinder engine is highly reliable, but its consumption is high.
|Fuel system||distributed injection|
|Power output, hp||270 – 295|
|Torque output, Nm||373 – 376|
|Cylinder block||aluminum R6|
|Block head||aluminum 24v|
|Cylinder bore, mm||93|
|Piston stroke, mm||102|
|Compression ratio||10.0 – 10.3|
|Phase regulator||at the exhaust|
|Recommended engine oil||5W-30|
|Engine oil capacity, liter||6.6|
|Euro standards||EURO 2/3|
|Fuel consumption, L/100 km (for GMC Envoy 2005)
|Engine lifespan, km||~400 000|
The engine was installed on:
- Buick Rainier 1 (GMT360) in 2003 – 2007;
- Chevrolet Trailblazer 1 (GMT360) in 2001 – 2008;
- GMC Envoy 2 (GMT360) in 2001 – 2008;
- Isuzu Ascender 1 (GMT360) in 2002 – 2008;
- Oldsmobile Bravada 3 (GMT360) in 2001 – 2004;
- Saab 9-7X 1 (GMT360) in 2004 – 2008.
Disadvantages of the GM LL8 engine
- Motors of the very first year of production fell into a recall campaign due to subsidence of sleeves.
- Otherwise, it is a fairly reliable unit, but not everyone will like its consumption.
- After 200,000 km, you may experience valve seat wear and chain stretching.
- The viscous coupling of the fan serves relatively little, and the engine is afraid of overheating.
- The weak points also include the exhaust manifold, very often it cracks.