What does exhaust brake do on Duramax?
What does exhaust brake do on Duramax?
Hence, the device is called an “exhaust brake”. Such a device almost completely closes the engine’s exhaust when the foot throttle is fully released, creating a pumping restriction to generate engine braking. It does this by placing a shut-off valve, called a “butterfly valve”, in the exhaust system.
What does it mean when my truck says grade braking active?
GRADE BRAKING ON or ACTIVE: This message displays when the grade braking has been activated while driving on downhill grades. Every time the ignition is cycled on, the grade braking feature is enabled. After that point, if the Tow/Haul button is pressed and held for three seconds, the feature will be disabled.
How does grade braking work on a Silverado HD?
When the feature activates for the first time that ignition cycle, the DIC will display “Grade Braking On” or “Grade Braking Active” and you will notice the transmission down shifts and engine RPM increases. At this point, if the brake pedal is released the transmission will hold the current gear.
What happens when you put grade braking on?
When the feature activates for the first time that ignition cycle, the DIC will display “Grade Braking On” or “Grade Braking Active” and you will notice the transmission downshifts and engine RPM increases. At this point, if the brake pedal is released the transmission will hold the current gear.
Is there no grade braking in manual mode?
No grade braking is available in Range Selection Mode (Manual Shift Mode). For grade braking to activate it requires the driver to apply steady brake pedal pressure to maintain desired speed while driving on a downhill grade.
When did GM start using powertrain grade braking?
Powertrain grade braking has been available since 2009 on LD models and since 2007 on HD models, but Tow/Haul mode had to be selected. The powertrain grade braking should not be confused with “Cruise Grade Braking.”
What kind of engine does a GM Duramax have?
Producing 365 horsepower and 660 lb-ft of torque, and backed up by the Allison 1000six-speed tap-shift automatic transmission, GM’s new diesel powertrain leads the way. Similar to the LLY & LBZ, the LMM Duramax diesel uses a variable-geometry turbocharger designed to produce excellent low-speed response and reduce emissions.
What kind of engine does a 2007 Duramax 6600 have?
Designed to meet the 2007 emissions regulations, the 2007 LMM Duramax 6600 diesel engine has met the challenge, and continues to lead in power & torque.
No grade braking is available in Range Selection Mode (Manual Shift Mode). For grade braking to activate it requires the driver to apply steady brake pedal pressure to maintain desired speed while driving on a downhill grade.
Powertrain grade braking has been available since 2009 on LD models and since 2007 on HD models, but Tow/Haul mode had to be selected. The powertrain grade braking should not be confused with “Cruise Grade Braking.”
