There is no vacuum switch. There is an electric actuator on the front left of the front end assembly right in front of where the cv shaft goes into the differential case and an electric actuator on the rear right of the transfer case.
The 2002 Chevrolet trailblazer heater fan relay switch is located behind the dashboard. The relay switch will be on the drivers side of the vehicle.
where is the O2 sensor on a 2002 chevy trailblazer
it is located in where the air filter is inside the box
where is stock amp located
where is the temperture sensor located on a 2002 chevy trailblazer with a 4200 motor
on the turn signal lever it is a small slide switch
center right fender in hose
behind the hood latch.
The MAP sensor on a Trailblazer is the Manifold Air Positioning sensor. It is located on the top of the engine.
Probably a faulty ignition switch. learn more at www.trailvoy.com Trailblazer enthusiasts website.
Under center console
The brake switch is located on the arm of the petal up toward the lower dash. You may need to remove the lower dash it to get to it. Sometimes the switch is faulty but most of the time it just needs to be tightened. This is very simple there is no need for a mechanic.