'98 - '02 Isuzu Rodeo and Trooper (with factory keyless entry)
Instructions for programming 1. Get in car and make sure all doors are
unlocked. 2. Open driver's door and leave open. 3. Put key in ignition.
4. Turn key to 'on position' (dash lights on, but do not start) and
back to 'off position' 3 times in 5 seconds or less. (you must turn the
key very fast) 5. Close and open driver's door 2 times in 5 seconds or
less. 6. Turn key to 'on position' and back to 'off position' 5 times
in 5 seconds or less. (turn key very fast) 7. Close and open driver's
door the doors should lock and unlock twice after this happens push the
lock or unlock button on the remote, doors will lock and unlock. Push
the lock or unlock button a second time and doors will lock and unlock
again. You are finished! The above sequence erases all previous codes
and adds the new code as #1. If you are adding a second remote, you
should follow the same sequence with the exception of step 6; instead
of turning the key to the 'on position' and back to the 'off position'
5 times in 5 seconds or less, do it 3 times in 5 seconds or less and
then continue to step 7. **
*Remember to turn the key to the on and off
position very fast.
Found it at http://isuzufaq.ibctech.ca/#faq41