Chris253, I am reading the posts, but it appears you have purchased an aftermarket kit...Right? If you truck has power door locks it would have been easier to grab some bone yard parts to get OEM stuff from a 98-02 truck or van and have rolling codes, some programming capabilities with a system that opens the left door first and passengers side second using the key fob. Lock verification includes horn chirp or not, courtesy lights for 30 seconds until the key goes in and the ability to add a tailgate popper to open from the transmitter if you found parts of agmt400 utility. The OEM remote control receiver is on the drivers side behind the "B" or "C" pillar near the floor. The rest of the parts are factory fit, with part numbers including the key FOB transmitter which produces a different wireless code each time it's used. Once programmed, it works with the lights, horn and doors without the aftermarket remotes that use only one frequency. Thieves use a receiver to capture your signals frequency and use that to open the door. It happens a lot. Truck fall into a different group for emission, theft deterrent and engine (Plus others)
As df2X4 indicated, passlock systems came into the 98MY. So what can you do to keep your vehicle where you put it? An old trick used for years is to examine the cruise switch circuit. Why? Older 80's vintage used ground inputs for set/coast, but most use B+ for inputs. If equipped, the cruise on/off switch supplies B+ for inputs. Turn off, no power goes into the switch, but turn to "On", you can add a relay that controls the crank circuit or power to the distributor. The older type that used ground, you wire the same relay into the "Set/Coast" button. Now what? Well, you insert the key with the right hand, ready to turn, but the left hand pushes the "Set/Coast" button down that no allows cranking.
GMeSI only goes back to 98, so it show B+ at the cruise handle, I don't know what 97 uses. But what I am saying is this is an added layer of security without having passlock and two hall-effect switches to create a voltage drop (One of 10 combos) to the theft module. It only keeps the owner from driving away when it breaks. I prefer something simple.
