DIESEL EXHAUST BRAKE — ENGINE BRAKING (IF EQUIPPED)
The purpose of the exhaust brake (engine braking) feature is to supply negative (braking) torque from the engine. Typically, the engine braking is used for, but not limited to, vehicle towing applications where vehicle braking can be achieved by the internal engine power, thereby sparing the mechanical brakes of the vehicle.
Benefits of the exhaust brake are:
Once the “Exhaust Brake Indicator” is illuminated and the vehicle is moving faster than 5 mph (8 km/h); the exhaust brake will automatically operate when the driver removes pressure from the accelerator pedal. Exhaust braking is most effective when the engine RPM is higher. The automatic transmission will downshift more aggressively in TOW/HAUL mode when the exhaust brake is enabled to increase brake performance.
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For optimum braking power it is recommended to use the exhaust brake while in TOW/HAUL mode.
The exhaust brake feature can also be used to reduce the engine warm-up time. To use the exhaust brake as a warm-up device, the vehicle must be stopped or moving less than 5 mph
(8 km/h), the "Exhaust Brake Indicator" must be on, and the coolant temperature must be below 180°F (82°C) and ambient temperature below 60°F (16°C).
Automatic “Smart” Exhaust Brake technology delivers smoother, less aggressive exhaust braking characteristics during downhill descents. Although it can apply full exhaust braking force if needed, Automatic “Smart” Exhaust Brake may not apply obvious braking if the vehicle speed is not increasing. Automatic “Smart” Exhaust Brake is intended to maintain vehicle speed, while Full Exhaust Brake is intended to reduce vehicle speed.
Automatic “Smart” Exhaust Brake can be enabled by pushing the exhaust brake button (on the center stack) again anytime after the normal Full Exhaust Brake has been turned on. The “Exhaust Brake Indicator” in the instrument cluster display will change from Yellow to Green when Automatic “Smart” Exhaust Brake is enabled. Pushing the exhaust brake button again will toggle the exhaust brake mode to off.
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