Honestly, if you have to ask here, you should take it to your local Chevy dealer and get them to do it.
Your keyless remote might not work for your 2002 Chevy Tahoe because the battery in the remote is dead. You can replace this battery by prying the remote cover off of the back of the remote or by removing the screws holding the cover closed.
Hold the lock and unlock buttons simultaneously for 7 to 10 seconds. The locking mechanism on your car should activate and your remote should be synchronized. Just did this on my 2003 Tahoe. You definitely do have to resynchronize our keyless entry remote after changing the battery. The car manual clearly states that you need to (although it doesn't say how).
Start vehicle and then hold both lock and unlock buttons on remote for 10-20 seconds, locks will activate and should be programed.
see also 2004 silverado
As far as I know only the dealer can do this for you. When you bring the car to the dealer have all keys and keyless entry fobs with you as they all have to be recoded.
check out the website www.automotivehelper.com
The battery in a Tahoe is no different the the battery in any large SUV.
To determine if your 1996 Tahoe has factory keyless entry, check for a keyless entry remote or fob that may have come with the vehicle. Additionally, look for a small receiver module, typically located near the driver's side under the dashboard or in the center console. You can also check the vehicle's owner's manual or contact a dealership with your VIN to confirm if keyless entry was included in your specific model. Lastly, try locking and unlocking the doors with the key fob or by using the lock button on the driver's door; if they respond, you likely have factory keyless entry.
possiblly the starter or fuel pump is out.
It is the key fob battery.
$60.00 to $80.00
sounds like it has a short in the circuit somewhare and or maybe the battery in the remote is going bad or did you recently change your stereo . maybe one of your doors is not closeing all the way so it might be hitting the switch.