This details out what exactly is needed to add/change RPO option codes to existing 1997+ Corvette’s, using a Tech 2 scan tool.
These instructions will also help owners of F45 real time dampening suspension option convert to regular shocks that don’t have sensors built in. Right now people are paying upwards of $200.00 for emulators that plug into the wiring harness to trick the BCM. A simple solution is to just go into the BCM’s function and toggle off the F45 suspension options. No codes will be set and the car will not go into reduced engine power mode.
Step 1: Obtain a working TECH2 (original or HQ clone- both ok)
note: Tech 2 knockoff has many types and here is a chart for you to know all.
Step 3: Enter Diagnostics menu
Step 4: Enter year of car
Step 5: Enter Passenger Car menu
Step 6: Select Body from the menu
Step 7: Select Y body from menu
Step 8: Select Y body from menu
Step 9: Select transmission type
Step 10: Enter body control module menu for adding/deleting option codes such as automatic headlamps,F45 suspension.
Step 11: Enter Special Functions menu
Step 12: Enter BCM RPO Reprogram
Step 13: Enter cars country of origin
Step 14: Toggle functions on and off. The asterisk next to the option code indicates this function has been turned on. Note that the Automatic and Manual HVAC controls are both turned on. This is normal and should be ignored. Go ahead and hit the save option button when you’re done and power off the Best obd2 scanner TECH2.
Note: If your vehicle was built after Feb 02 you may or may not have the sensor installed from the factory required to make the T82 automatic headlamp function by simply turning it on in the cars BCM. A quick way to verify this is to remove (no tools required) the defroster vent on the center of your dash. There should be 2 sensors installed. The sensor on the right is for your climate control and the sensor on the left is for the T82 automatic headlamp control. If this sensor is not present it can be purchased from GM for about $12.00. The part number is 12450121 and it simply snaps into a space already provided on the defroster grill.
Next you need to find the pigtail that plugs into the sensor. It is on the right side of the steering column and has a piece of white tape holding it folded in half. Cut or tear the tape and leave it dangling down.
Now, take a metal clothes hanger, and stick it down through the defroster hole in the dash. You will see a little 1 inch by 1/4 inch slit to slide the hanger through, then force it to the floor. Tape the pigtail to the hanger and pull it back up through the hole in the dash. Then plug it in to the sensor, snap the grill back in and you are done.