What type of door lock system is a 99 Chevy Tracker?

What type of door lock system is a 99 Chevy Tracker?

I’m wiring a keyless entry system for my 1999 Chevy Tracker, 4-door 2.0L SUV. My multimeter broke just before I was about to test the door switch to find out what type it is.

I’m looking for an answer like “3-Wire Positive” or “Type C Alternating Switch”.

I already know how to test and find out, but the multimeter is broken and it’s midnight.

Thanks in advance!