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Here's a good reference for the problem you seem to be having: Program Spare Key FOB The vehicle must be OFF. Open the rear compartment. Place a known key fob within the interior of the vehicle. At the rear of the vehicle insert the vehicle key in the rear compartment lock cylinder located in the lower left and cycle the key 5 times within 5 ...

I believe that it requires a scan tool. This link is for a 2005 Cobalt, but it should be the same as a 2006. Also, according to eHow: Some vehicles, such as the Chevrolet Cobalt, Pontiac G6 and Chevrolet Malibu, do not have programmable remote systems.

Please also note that the entry code cannot be reprogrammed. It is more-or-less burned into the module. This is true of all fords. This module is called a GEM or RAP, depending on your model and vintage. GEM - Generic Electronics Module. RAP - Remote AntiTheft Personality If you wish to change the code, you have to replace this module to do so.

Please also note that the entry code cannot be reprogrammed. It is more-or-less burned into the module. This is true of all fords. This module is called a GEM or RAP, depending on your model and vintage. GEM - Generic Electronics Module RAP - Remote AntiTheft Personality SJB - Smart Junction Box Early 90's fords, anti-theft and Keyless entry was a ...

Ford's factory 5-button keypad systems have a factory code, which is always active, and also can be programmed with a personal code. The factory code is on the "owner's wallet card" and is also printed on the computer module. In the '01-02 Expedition, the computer module is buried up in the dash behind the radio, though people claim you can read it with a ...