STARTING AND OPERATING 121 CAUTION! 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. AUTOMATIC TRANSMISSION WARNING! Use of aftermarket exhaust brakes is not recommended and could lead to engine damage. The transmission may not engage PARK if the vehicle is moving.
Always bring the vehicle to a complete stop before shifting to PARK, and verify that the transmission gear position indi cator solidly indicates PARK (P) without blinking. Ensure that the vehicle is completely stopped, and the PARK position is properly indicated, before exiting the vehicle. NOTE: 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 5mph (8km/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). Unintended movement of a vehicle could injure those in or near the vehicle. As with all vehicles, you should never exit a vehicle while the engine is running. Before exiting a vehicle, always come to a complete stop, then apply the parking brake, shift the transmission into PARK, turn the engine OFF, and remove the key fob.
When the ignition is in the LOCK/OFF (key removal) position, (or, with Keyless Enter ‘n Go™, when the ignition is in the OFF position) the transmission is locked in PARK, securing the vehicle against unwanted move ment. 4 You must press and hold the brake pedal while shifting out of PARK. WARNING! It is dangerous to shift out of PARK or NEUTRAL if the engine speed is higher than idle speed. If your foot is not firmly pressing the brake pedal, the vehicle could accelerate quickly forward or in reverse. You could lose control of the vehicle and hit someone or something. Only shift into gear when the engine is idling normally and your foot is firmly pressing the brake pedal.
Automatic “Smart” Exhaust Brake 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. (Continued) When leaving the vehicle, always make sure the ignition is in the OFF position, remove the key fob from the vehicle, and lock the vehicle. (Continued)