Chevrolet GMC Yukon Specifications download pdf (Page 13)

Auto Start

The vehicle also has an Auto Start feature. The engine

will remain off while in Auto Stop mode until vehicle

conditions require the engine to run. The near-instant

starting of the engine from Auto Stop mode is called

Auto Start. Some of the vehicle conditions that

may cause the engine to Auto Start are:

• The hood is opened.

• The gear selector is in M (Manual Mode) or

R (Reverse).

• The hybrid battery state of charge is too low.

• The hybrid battery voltage, temperature or power

limits are exceeded.

• The engine is not at operating temperature.

• Acceleration demands require the use of the engine.

EV Mode

The vehicle also has an EV mode which uses only the

electric motor to move the vehicle. Depending on

the state of battery charge, the vehicle can travel up to

two miles (3.2 km) in EV mode. EV mode is unavailable

when the vehicle is out of fuel.

With light acceleration, the vehicle will drive in EV mode.

If increased acceleration is required, or the vehicle

reaches approximately 25 mph (40 km/h), the engine

will start automatically. The engine shuts off at speeds

below 25 mph (40 km/h) unless the transmission is

in M (Manual Mode) or Auto Stop is disabled.

During heavy acceleration, both the engine and hybrid

electric motors supply power. A sensation similar to

a transmission gear change can be felt as the

transmission changes modes. Engine RPM may remain

above 4,000 RPM for a longer period during hard

acceleration.

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Chevrolet GMC Yukon Specifications Page 13