I just got a 2002 Blazer and I use to have a 2000 Impala, What I'm wondering is there a way to get the lights to flash when I lock it like they do when i unlock it. Also I'm wondering if the Blazers have the same feature as the Impala where the headlights stay on for it either 30 or 60 seconds after you shut the car off, I use to control this with my radio in the impala. It was nice having some light if u ever needed to do anything after getting out of the car....thanks Jon

 

This is the info I found,

Unlock Drivers Door Only
Momentarily press the UNLOCK button in order to perform the following functions:
• Unlock the driver door only.
• Illuminate the interior lamps for a predetermined amount of time or until the ignition is turned ON.
• Flash the park lamps.

Unlock All Doors-Second Operation
Momentarily press the UNLOCK button a second time within 2 seconds of the first press in order to perform the following functions:
• Unlock the remaining doors.
• Illuminate the interior lamps for a predetermined amount of time or until the ignition is turned ON.
• Flash the park lamps.

Lock All Doors
Press the LOCK button in order to perform the following functions:
• Lock all of the doors.
• Immediately turn off the interior lamps.
• Chirp the horn, if the LOCK button is pressed a second time within 5 seconds.

Rear Compartment Lid Release
Press the Rear Release button once in order to perform the following functions:
• Unlock the rear compartment.
• Illuminate the interior lamps for a predetermined amount of time or until the ignition is turned ON.

Alarm
A single press of the panic button performs the following functions:
• Illuminates the interior lamps
• Pulses the horn
• Flashes the headlamps
• Flash the park lamps

The panic alarm continues for a predetermined amount of time or until either of the following occur:
• The panic button is pressed again.
• The ignition switch is turned to RUN with a valid key.