Question 1

Do I have to go to the Chevrolet dealer to get a replacement remote for my 1999 Blazer?

Accepted Answer

No. The KOBUT1BT remote on the 1999 Blazer is a standalone RF unit. It does not require dealer-level programming through the OBD port. Syncing it to the vehicle's receiver uses a manual procedure involving the ignition cycle and button presses on the remote itself. Any qualified locksmith with the right replacement remote and a B102 or B106 key blank can handle both the remote pairing and the key cut on site. The dealer route works, but you are paying for shop time, waiting on a parts order, and driving the truck there without a working remote in the first place.

Question 2

What exactly is the KOBUT1BT remote, and how does it work with my Blazer's security?

Accepted Answer

The KOBUT1BT (GM part number 15732805) is a four-button keychain remote. It handles lock, unlock, panic, and rear hatch glass release over RF. It talks to a receiver module in the truck, not the immobilizer. Your 1999 Blazer runs GM's PassLock system, which reads a Hall-effect sensor in the ignition lock cylinder when you turn the key. The security handshake happens at the cylinder, not through a chip in the key or the remote. So the remote controls convenience features only. If the remote dies, you can still start and drive the truck with the mechanical key.

Question 3

How long does dealer replacement take compared to a mobile locksmith visit?

Accepted Answer

Dealers typically quote a parts wait plus shop time. Multiple Blazer and S-10 owners on GM forums have reported waiting days for the remote to arrive, then sitting in the service lane for an hour or more while the actual pairing takes minutes. On my end, I carry KOBUT1BT stock and CR2032 batteries in the van. The remote sync procedure on these second-gen Blazers is a short ignition-cycle sequence followed by a button press. The whole visit, including testing every button and checking range, usually runs about 15 to 20 minutes at your location.

Question 4

My 1999 Blazer sometimes won't start and the SECURITY light stays on. Is that the remote?

Accepted Answer

Not the remote. That is PassLock. The ignition lock cylinder has a small Hall-effect sensor that reads a magnet in the lock. When that sensor drifts or fails, the BCM (body control module) sees a mismatch, sets a "no start" condition, and lights the SECURITY lamp on the dash. GM issued TSB 02-06-04-007 covering PassLock-related no-start issues on trucks in this platform, including the Blazer. The classic workaround owners post on forums is the 10-minute relearn: turn key to ON, wait for the SECURITY light to go off (about 10 minutes), turn off, repeat three times. That resets the learned value. If it keeps happening, the sensor or wiring in the cylinder is failing and needs replacement.

Question 5

Can I buy a KOBUT1BT remote online and program it myself?

Accepted Answer

Yes, actually. The 1999 Blazer is one of the few GM vehicles where self-programming the remote is doable. The procedure involves cycling the ignition to a specific position, holding a button sequence, and listening for the door locks to cycle as confirmation. GM published this in the owner's manual. The catch is getting a remote that actually works. Cheap clones on auction sites are hit-or-miss on frequency and rolling code compatibility. If you buy one and it will not pair after multiple attempts, the board inside is probably not matching the receiver. That is when most people end up calling me.

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