I recently had to replace a warn key and the only way I could find was to order a new key from the dealer. The dealer will need proper ID and proof of ownership and will order the key by the VIN of the car. The new key will come pre-cut with the correct cut for the ignition, doors and truck locks and pre-programmed to match the code of the anti-theft chip. The reason your car will not run is because of the anti-theft and has nothing to do with the battery within the key. If your key has a built in light, the battery only operates the light.