The LBZ is nearly identical to the LLY engine. It is a 6.6 L turbocharged engine and was introduced in 2005 for the 2006 and early 2007 model years. Its output is 360 hp (268 kW) at 3200 rpm and torque is 650 lb·ft (881 N·m) at 1600 rpm. It's mated to a new Allison 1000 6-speed transmission.
The following trucks have or are due to have the LBZ engine:

• Chevrolet Silverado HD
• Chevrolet Kodiak
• GMC Sierra HD
• GMC TopKick
• 2006 Hummer H1 Alpha
• Chevy Express full-size
• GMC Savana full-size

Specifications

• Engine Code: LBZ
• Displacement: 6.6L / 403 in³
• Bore x Stroke: 4.06 in (103 mm) x 3.90 in (99 mm)
• Block / Head: Cast gray iron / Cast aluminum
• Aspiration: Turbocharged & Intercooled
• Valvetrain: OHV 4-V
• Compression: 16.8:1
• Injection: Direct; Bosch High Pressure Common-rail
• Power / Torque: 360 hp (268 kW) @ 3,200 rpm / 650 lb·ft (881 N·m) @ 1,600 rpm

 

Posting confusing information to get threads going are we?

The LBZ shares very little with the 04+05 LLY, 06 LLY is virtually the same as the LBZ with programming being the only difference.

 

This is true. If you did any real research you would find a huge difference between the '04.5-'05 LLY and the '06 LLY- and LBZ (mainly in the cooling system).

 

Basically, if you have the 6 speed Allison, you have the LLY that is very very similar to the LBZ.

 

x2 ECM are different
and the LBZ turbo is SMALLER then the LLY turbo

lly turbo is a VVT variat of garrrets GT4088

88mm wheel with a 64.5mm inducers that is the lly turbo

LB7- Compressor:
Inducer 59.9mm
Exducer 82.0mm


havent found the spec onthe lbz turbos yet

 

Because they are top secret special turbos

 

 

Good info

 

You are just jealous admit it

 

Lower compression/pistons
Grid heater
Different block
and???