Ridiculously enough some L200 have dealer approved aftermarket alarms fitted which may cause the reprograming not to work! However here is the process anyway...
Locate the diagnostic connector, 16 pin connector normally under the dash near the drivers right knee.
The earth the top left pin(Pin #1), simply run some wire from here to a solid piece of bare metal under the dash.
Close all doors
Turn ignition switch to ACC position and then back to OFF 3 times within 10 seconds
Doors should lock and unlock
Press remote lock or unlock button once
Press lock or unlock button twice within 10 seconds
Doors should lock then unlock
Repeat within 1 minute for any other remotes you wish to program.
Remove earth wire.
Done
If this does not work then unfortunately you will need to visit a dealer to get it reprogrammed as you have an aftermarket alarm system fitted, but hopefully it should be ok
http://www.wikihow.com/Program-GM-Keyless-Remotes
This is how to program GM keyless remotes. (NOTE - The GM dealer will charge $40.00 to do this 1 minute task - what a rip!)
1
A beautiful and awsome addition to cars , smart keys ...
I need to set a clear definition for the following terms
keyless go - key less entry - proximity - smart key - IR keys - push to start
I - Keyless go
A system that enables the driver to lock and unlock the car without using keys ..or pushing remote buttons!
so, as long as you carry the {smart key} when you pull the car door handle the car automatically unlocks and open the door . door handles got sensors , and some has buttons, you push the button and the door unlocks if you carry the smart key
II - key-less entry
Unlocking the car without a key, using a remote, pressing the remote's button to lock / unlock the car.
III - Proximity
Proximity sensors are
Proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. Wikipedia
So I guess it's a term that refers to keyless Go systems
IV - Smart Keys
smart keys are sweet .. I love 'em , it's just opening the car and turning the ignition on without using a key, the metal key, the blade itself .
in some cars u'll find a button instead, and the "smart key" is placed in a dock, where the car can read it's code and if it the correct smart-key, it'll start .
smart keys has different shapes, there are card like keys, as in renault and mazda , there are some nicely shaped fobs as in the merceds or BMW smart keys. let's quote something from Wikipedia :
Smart key is an electronic access and authorization system which is available as an option or standard in several cars. It was first used by Mercedes-Benz in 1998. Wikipedia
For the record, mercedes benz always do things first :) .
V- IR Keys
I don't know much cars that used IR keys in thier systems, just Mercedes benz, these are Keys that uses Infra Red to transmit signals between the car and the key.
VI- Push To start :
look at the picture :
this video should be convenient :