Enabling Unlimited Key Mode

NOTE: Unlimited Key Mode is intended for use by fleet customers who need more than 8 keys for their vehicle.

The customer must choose an 8-digit, non-00,00,00,00 number that will be programmed to all of their vehicles. All customer vehicles need to use the same number. Valid digits are 0-9 plus the letters A-F.
NOTE: If the powertrain control module (PCM) PID: UNLIMITED TRANSPONDER KEY ID is not displayed on screen, Unlimited Key Mode is turned on, and must be turned off before viewing the stored code. To view/change the stored code, follow the procedure for turning off Unlimited Key Mode below. Check the PID: UNLIMITED TRANSPONDER KEY ID and compare its value against the code chosen in Step 1.
Using the diagnostic tool, select PCM from the menu. Follow SECURITY ACCESS to obtain security access. For additional information, refer to ANTI-THEFT SECURITY ACCESS in this article.
Turn off the unlimited key mode to view the security key PID.
If the Unlimited Transponder Security Key PID was 00,00,00,00, select Active Command: SET UNLIMITED TRANSPONDER KEY. Enter the 8-digit code chosen by the user.
Select: ENABLE UNLIMITED KEY MODE/RESET SERVICE BIT, if applicable.
Select: IGNITION CODE ERASE.
Disconnect the diagnostic tool and turn the ignition switch to the OFF position.
Program 2 ignition keys to enable the vehicle by cycling the ignition switch from the OFF position to the RUN position.
Program any additional keys using either the KEY PROGRAMMING USING TWO PROGRAMMED KEYS or the KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT in this article.