2000-2005 Buick Century, Regal

Locate the BCM and install the PRO Bypass

The BCM is under the left side of the dash. Remove the 3 push pin retainers and slide the hush panel out of the way. Unplug the 2 BCM connectors.



There are 4 electrical connectors on the BCM (C1, C2, C3and C4)

We need 2 wires on C1 and 2 wires on C2.

C1 , Blue.


and C2, Purple.



To install the Full bypass connect it as follow:

PRO Bypass

Car Wires


Attach as a 3 wire splice into Connector C1, pin J, PNK


Attach as a 3 wire splice into Connector C1, pin K, BLK/WHT


Not Used


Not Used


Cut the wire in Connector C2, Pin B3, WHT/BLK and attach this Yellow wire of the bypass to it going towards the BCM


Not Used


Attach as a 3 wire splice into Connector C2, Pin B4 PPL/WHT


Be sure the light on the side of Pro Bypass module lights when the key is turned on. If there is no light then the Red or Black wire are not getting the power and ground. If the light is on then proceed with the instructions.


Turn off the key and open the PRO Module cover (this will NOT void the warranty) by removing the 2 screws on the bottom. Inside there are 2 sets of switches.


  1. Set SW1 (8 switches) as following:



  1. Set SW2 (10 switches) as indicated in the first row of the table below.


  1. Try to start the engine. If engine starts then replace the cover on the PRO Module, the installation is completed. Otherwise if the engine still doesn’t start, turn off the key and remove it from the tumbler, wait 4 minutes and then continue with step #4 here below.
  2. Repeat step #3 above, but with SW2 as in row 2 of the table, then if still doesn’t start repeat again with SW2 as in row 3 of the table and so on until the right code is found and the engine will start.

IMPORTANT: If your car still does not start, please follow the troubleshooting directions for Hybrid Systems before contacting our support team. This will make it easier and faster for us to handle your support questions and will enable us to serve you better.​​

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