2000 Buick Lesabre
Key Replacement - Save vs Dealer in Ventura County

2000 Buick Lesabre Transponder Key Replacement - Fast, Affordable & Professional

Got a call from Downtown Oxnard, a guy standing next to his 2000 LeSabre in a bookstore parking lot. Car cranked and cranked but would not start. SECURITY light solid on the dash. He'd been turning the key over and over, which is the worst thing you can do because it resets the lockout timer every time.

When I pulled up he was already on his phone looking at quotes. Dealer wanted him to tow it in, leave it overnight, and come back the next day. He looked tired.

I plugged into the OBD-II port under the dash. The Body Control Module, part number 09377399 on these H-body LeSabres, stores the PK3 transponder IDs. His original key's transponder was reading intermittently. The pellet in the key head was cracked, probably from years on a heavy keyring. The resistance value was drifting, so sometimes the BCM saw it and sometimes it didn't.

Cut a new B99 blank with the correct PK3 chip, ran the 10-minute relearn cycle three times to register it to the BCM, confirmed the SECURITY light went off and stayed off. Whole thing took about 30 minutes, most of that just waiting out the timed relearn steps.

He turned the key once, the LeSabre started clean, and he just sat there for a second like he didn't trust it yet. Then he nodded and drove off. A fraction of what the dealer route would have cost, and he never left the parking lot.

BSIS Licensed

LCO#6792

CA Bureau of Security & Investigative Services

NASTF Certified

National Automotive Service Task Force

Fully Insured

Liability & vehicle damage coverage

Google Guaranteed

Verified & backed by Google