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Can I change the exhaust mode when the car is off?
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03-18-2020, 12:29 PM
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HogmanZL1
Drives: 2018 ZL1 Convertible
Join Date: Oct 2018
Location: Georgia
Posts: 79
hold the start button for 6 seconds without your foot on the brake. it will boot up the car infotainment and you can select stealth from there and you will hear the valves close. then you can start in stealth mode.
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