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Drive High Mode Engine On: Notes

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

When the gear selector lever is in the Drive (D) position and the HPCM determines that operating conditions are appropriate, the internal combustion engine (ICE) is started, the main fluid pump provides hydraulic fluid pressure. If the transmission is operating in extended range fixed gear ratio and the HPCM determines that operating conditions are appropriate for a shift to extended range high, the following changes would occur to the transmission's hydraulic and electrical systems.