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Old 06-05-2020, 05:22 PM   #12
GOMD
 
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Drives: 2017 Camaro 1SS, 2023 Sierra
Join Date: Feb 2014
Location: Cleveland, OH
Posts: 196
If you hold the start button down for about 5-6 seconds, without pressing the brake pedal, the car will turn on in "service mode". It powers up all electronics basically, and you can then switch to "stealth" in the radio, or toggle to touring or snow mode on the center console.
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