As usual, Max was WRONG!!!! The Duramax diesel is STILL going strong
after several years of PROVEN reliability.
2006 Duramax 6600 Turbodiesel to Deliver Class-leading Torque in a More
Powerful and Refined Package
Engine output for Chevy Silverado HD and GMC Sierra HD increased to 360
horsepower and a class-leading 650 lb-ft of torque
New glow-plugs reduce start time by as much as 50 percent
PONTIAC , MICH. â€" Later this year, GM Powertrain will introduce
a new 6.6L Duramax 6600 turbodiesel V-8 (RPO LBZ) for the 2006 model
year Chevy Silverado HD and GMC Sierra HD with class-leading horsepower
â€" 360 (268 kw) at 3200 rpm and class-leading torque, at 650
lb.-ft. (881 Nm) at 1600 rpm. In addition to the power increase in the
Silverado and Sierra, all 2006 Duramax engines have been significantly
revised to deliver lower emissions and significantly improved quietness
and smoothness in every application.
The 2006 Silverado HD and Sierra HD with the Allison 6-speed automatic
transmission will be equipped with a significantly revised 310
horsepower Duramax 6600 (LLY) through the third quarter of 2005. It
will be replaced in these applications in the fourth quarter of 2005,
by the higher output, 360-horsepower Duramax (LBZ).
â€śThe introduction of the Duramax diesel in 2001 represented a
significant evolution in North American diesel pick-up truck market and
propelled GMâ€™s heavy duty diesel pick-up truck market share to
over 25 percentage points,â€ť said Charles Freese, GM Powertrain
executive director, diesel engineering. â€śThe introduction of the
improved, 2006 Duramax turbo diesel once again sets a new benchmark to
which all others will be measured.â€ť
The Duramax 6600â€™s horsepower and torque increase and emissions
reduction are enabled by a strengthened iron cylinder block and a lower
compression ratio. The lower compression reduces stress on the engine
by reducing the peak cylinder firing pressure. This, in turn, allows
more fuel to be burned â€" more fuel means more power â€"
while the lower compression helps reduce NOx emissions. Lower
compression also helps reduce noise and vibration, making the all
variants of the 6600 a quieter and smoother engine.
A revised variable-geometry turbocharger also enhances the driving
experience of the Duramax 6600. Aerodynamic changes to the
turboâ€™s vanes help tailor controlled application of turbo power
for seamless and immediate response at full throttle. The turbo, which
spins at up to 120,000 rpm, is high-speed-balanced, reducing vibration
and resonance â€" and contributing to the engineâ€™s overall
smoothness and refinement. The revised turbo also helps reduce
emissions, while maximum boost remains at 20 psi.
Another new feature of the Duramax 6600â€™s turbo system is the
capability of the variable-geometry turbocharger to provide exhaust
braking. This function is available on some medium-duty truck models
and can replace add-on exhaust brake hardware. With the new system,
braking is controlled by a signal from the engine controller and can be
activated by the driver.
The comprehensive list of changes and upgrades to the 2006 Duramax 6600
* Cylinder block casting and machining changes strengthen the bottom of
the cylinder bores to support increased horsepower and torque
Upgraded main bearing material increases durability
* Revised piston design helps lower compression ratio to 16.8:1 from
Piston pin bore diameter increased for increased strength
* Connecting rod â€ś I â€ť section is thicker for increased
Cylinder heads revised to accommodate lower compression and reduced
cylinder firing pressure
* Maximum injection pressure increased from 23,000 psi to more than
Fuel delivered via higher-pressure pump, fuel rails, distribution
lines and all-new, seven-hole fuel injectors
* Fuel injectors spray directly onto glow plugs, providing faster,
better-quality starts and more complete cold-start combustion for
Improved glow plugs heat up faster through an independent controller
* Revised variable-geometry turbocharger is aerodynamically more
efficient to help deliver smooth and immediate response and lower
Air induction system re-tuned to enhance quietness
* EGR has larger cooler to bring more exhaust into the system
First application of new, 32-bit E35 controller, which adjusts and
compensates for the fuel flow to bolster efficiency and reduce
The Duramax 6600 also has a new intake air heater to reduce smoke and
emissions during cold or light-load driving. The system features a
1000-watt grid heater located in the air intake duct, which is
triggered automatically by the engine controller. It heats up the
incoming air to speed warm-up of the engine.
In addition to 50 more horsepower and 45 more lb-ft of torque in the
Silverado and Sierra, changes to the 2006 Duramax 6600 build on a host
of improvements introduced for â€™05 â€" improvements that
bolstered an already strong foundation. The Duramax 6600 features a
rigid cast iron cylinder block with induction-hardened cylinder bores;
four-bolt, cross-drilled main bearing caps; forged steel,
nitride-hardened crankshaft; aluminum pistons with jet-spray oil
cooling; aluminum cylinder heads with four valves per cylinder;
integrated oil cooler and a charge-cooled turbocharging system.
Features, such as easy-access fuel filter and timing gears, reduce
maintenance time and effort.
A new, 32-bit E35 engine controller monitors and adjusts the
engineâ€™s operation. Designed exclusively for the Duramax diesel
engine, the controller helps the injectors precisely meter fuel to the
cylinders and can compensate for the variability of the injectors and
fuel flow. This sophisticated, more powerful controller also can
support up to five injections per cylinder and eliminates the need for
an engine-mounted drive unit to fire the fuel injectors.
The new Duramax 6600 in the Silverado and Sierra heavy-duty pick-ups
will be available exclusively with the new Allison 1000 6-speed
automatic transmission, featuring class-first features, like tap-shift
range selection mode.
In addition to the Chevy Silverado HD and GMC Sierra HD, the Duramax
6600 (LLY) is also available at varying power outputs in the Hummer H1
Alpha, Chevy Kodiak and GMC Topkick. For 2006, the Duramax is available
for the first time in GMâ€™s full-size vans, Chevy Express and GMC
Savana, providing power and capabilities matched with quietness and
smoothness not found in competitorsâ€™ diesel-equipped vans.
The Duramax 6600 was introduced in 2001 and was developed in a
partnership with GM Powertrain and Isuzu Motors. Since its
introduction, more than 650,000 6.6L Duramax diesels have been built
The Duramax 6600 is assembled at the DMAX facility in Moraine, Ohio , a
joint venture between General Motors and Isuzu created specifically to
produce diesel engines.