2006 Duramax LLY vs. LBZ
Couple questions, Other than the 8th vin digit, I've read that the LBZ will have the newer "DuramaxAllison" badge on the side where as the LLY will just say "Duramax. Do you guys agree? Also, unde...
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LBZ was not just a re-tuned LLY.
2006 – The coveted LBZ Duramax was introduced for the ’06 model year and featured a number of improvements that enabled the engine to produce up to 360 hp and 650 lb-ft of torque. The LBZ became a quick favorite of tuners, thanks to a stronger block design, larger connecting rods, new piston design, and heads that could handle more pressure. Higher fuel pressure levels, larger fuel rails, six-hole injectors, an improved variable-geometry turbo, and a larger EGR cooler setup were also added. An advanced, 32-bit engine computer helped improve power, efficiency, and emissions. Although the engine was saddled with EGR, the LBZ was the last Duramax offered without a fuel-economy-robbing diesel particulate filter (DPF). This meant the exhaust system could be altered while keeping the truck street-legal. 2006 was also the year GM introduced the six-speed Allison transmission to the Duramax powertrain.
2006 – The coveted LBZ Duramax was introduced for the ’06 model year and featured a number of improvements that enabled the engine to produce up to 360 hp and 650 lb-ft of torque. The LBZ became a quick favorite of tuners, thanks to a stronger block design, larger connecting rods, new piston design, and heads that could handle more pressure. Higher fuel pressure levels, larger fuel rails, six-hole injectors, an improved variable-geometry turbo, and a larger EGR cooler setup were also added. An advanced, 32-bit engine computer helped improve power, efficiency, and emissions. Although the engine was saddled with EGR, the LBZ was the last Duramax offered without a fuel-economy-robbing diesel particulate filter (DPF). This meant the exhaust system could be altered while keeping the truck street-legal. 2006 was also the year GM introduced the six-speed Allison transmission to the Duramax powertrain.
