What should I do if the DIC displays 'NO REMOTE DETECTED' when trying to start the vehicle?

If the RKE transmitter battery is depleted or there is signal interference, place the transmitter in the transmitter pocket with the buttons facing the front of the vehicle. With the vehicle in P (Park) or N (Neutral), press the brake pedal and ENGINE START/STOP to start the vehicle. Replace the transmitter battery as soon as possible after starting. (Page 16)

From the official Chevrolet Trailblazer manual, page 16

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