chevyevery10
Newbie
I have a 98 K1500. I cannot get it to go into Program Mode when trying to program a new key fob. I tried jumping the #4 and #8 on the OBD and nothing happens. I have tested all the fuses and they are fine. I have 2 fuses, not in the manual, bottom left by the parking brake. They look fine but it makes me think that this pickup has an aftermarket security system in it and that the programming may be a different procedure. I have disconnected the battery and left it for a reset, tested all fuses, tried the next gen method of holding the unlock button and cycling the key twice, and still no response from the door locks. Any help would be greatly appreciated.