July 29, 2019 at 2:15 pm #554286
Have a ‘19 Sierra Denali. Have noticed that sometimes the auto stop (engine kill at stoplight) works, and sometimes it doesn’t? Wondering if it has something to do with the hot weather and A/C being on?
August 9, 2019 at 6:24 pm #556108
Owners manual, page 224 up, lots of reasons for it to not function and climate control settings the require the engine running (AC Compressor) disable it. Can’t have AC working if engine is off.
Auto Stops may not occur and/or
Auto Starts may occur because:
. The climate control settings
require the engine to be running
to cool or heat the vehicle
. The vehicle battery charge
. The vehicle battery has recently
. Minimum vehicle speed has not
been reached since the last
. The accelerator pedal is
. The engine or transmission is
not at the required operating
. The outside temperature is not
in the required operating range.
. The vehicle is in any gear other
than D (Drive).
. Tow/Haul Mode or other driver
modes have been selected.
. The vehicle is on a steep hill or
. The driver door has been
opened or the driver seat belt
has been unbuckled.
. The hood has been opened.
. The Auto Stop has reached the
maximum allowed time.
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