2000 SLE w/ a Valet (grey) PK3 key.
Bought a blank black PK3 key on ebay & had locksmith cut to match.
Turned car to Run w/ valet key then inserted new key & turned to Run. Then to Off & try to start, doesn't work.
Repeat above by Starting car then put in new key to Run. Key still won't start.
New key to Run for 10 minutes, Security light goes out, turned to Off then to Run for 10 minutes until Security light goes out, Turned to Off then to Run until Security light goes out. Turned to Off & tried to start car, doesn't work.
Use Valet key to Start, starter clicks, battery was down, put on charger, car started with Valet key.
Both keys are PK3. One Valet (grey) & one black. How does one program a key for a 2000 SLE?