As part of your recommended vehicle-maintenance schedule, windshield-wiper blades should be replaced once a year on your Chevy Trailblazer to make sure they’re working properly. Installing the wiper blades is an easy task you can perform yourself to save the labor charges your local service stations may charge.
Tools Used: Tools, Straight-edged screwdriver, Replacement wiper blades
Install Windshield Wipers
Lift the right-side wiper arm. To make this easier, you can sit in the driver’s seat, turn the ignition key to the accessory position and turn on the wiper motor; when the wiper arm is on an area of the windshield that will make it easier to reach, turn the ignition key to the “off” position. The wiper arm will stop on the windshield instead of defaulting to the “off” position, because the wiper motor is still in the “on” position. Underneath the hook of the wiper arm, at the direct center of the wiper blade, there is a small plastic release tab that needs to be lifted. You can use your finger; if it won’t move, a small, straight-edged screwdriver should be able to convince it. Lift the right-side wiper arm. Follow the same procedure as in Step 1.
Rest the wiper arm gently against the windshield or place the hook on a shop rag on the windshield. This will allow you to dispose of the old wiper blade and retrieve the new one.
Place the new wiper-blade center into the hook of the arm and pull back gently until you hear a slight click. This locks the blade in place in the wiper arm.
Repeat the procedure for the left-side wiper blade. Test them to ensure they are swiping the windshield properly.
Tips & Warnings
When you are removing the old windshield wiper, be careful not to allow the spring-loaded wiper arm to fling back against the windshield and crack it. You don’t want to create a need for an expensive auto repair by trying to save money on an inexpensive replacement.