Circuit/System Verification
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Interference from an RF device located on the keychain may cause this DTC to set. Remove any RF devices from the keychain before proceeding with the diagnostic.
Replace the suspected inoperative or malfunctioning key. DTC B3935 should not reset and the vehicle should start.
- If the replacement key results in the resetting of DTC B3935, replace the TDM.