The 2001 Chevy Blazer vacuum switch solenoid can be found on the firewall in the engine compartment. The vacuum switch solenoid will be on the passenger side of the firewall.
Check the 96 Blazer for any vacuum leaks in the system. A vacuum leak can cause the air flow to only come out of the heat vent.
Sounds like a bad switch or solenoid.
Bad neutral or clutch safety switch? Bad starter? bad starter solenoid?
If you're asking about eliminating the vacuum advance on the distributor assembly, I don't think you can eliminate that without a computer controlled ingnition system. The vacuum solenoid is used to advance the spark under higher load, and works together with a centrifugal weighting system that adavances the spark based on RPMs.
Starter relay, neutral/park safety switch, ingition switch in the column, ignition fuse.
Bad switch? - jump wires on switch to see if motor works Bad motor? See if you are getting power to the motor - if so bad motor Try slamming door with switch depressed - sometimes it works!
Check the fuses then check the brake light switch.
Usually this a faulty signal light switch. The Signal light switch disconects the brake light on the signaling side and makes it flash.
The neutral safety relay switch was bad. Replaced it and works fine.
That is not anywhere near enough information to make a determination about the status of the starter. Could be the starter, but could be the starter solenoid, wiring problems or even the ignition switch.
"Dead" Starter CircuitsI'm not familiar with your vehicle, but...I suspect that the problem is an "open circuit" conditionin the circuit between your ignition switch and the starter solenoid, or possibly the starter solenoid itself.Something that is supposed to be in contact is disconnected, or possibly the contacts inside the ignition switch have failed and won't make contact.
Check for a vacuum leak either under hood or under dash Check the operation of the vacuum operated motors under dash Check the operation of the selector switch