I have 1999 gmc safari. it won't start, there is no power from the ignition to the starter. Van will start if kicked over by screw driver. any ideas?

Screwdriver works, which means the battery is good and the starter works. in between is the ignition switch. first you should check for 12V at the starter post w/ the smaller wire on it as the key is held in "start" position. if no, then you should probe the supply wire @ the ignition switch (Red wire) for constant 12V; if no, then there is a bad wire/fuse between the battery and the ignition switch. if it does then probe the ignition wire on the switch (Pink) w/ key in "on" position. if no voltage, then bad ignition switch. if yes, then probe the starter wire on the switch (Yellow) for 12V w/ key in "start" position. If no, then bad ignition switch. If yes, then check for wire break between ignition switch and starter

Well you need to see if you have voltage at the little wire on the starter solenoid when some is turning key if no voltage at the wire could be bad ignition switch and make sure the security light is not blinking or on it should go out when you put it in to run position if it is on this may be issue hope this helps