TRAILBLAZER MODEL EXT MODEL
The jacking equipment you will need is stored under the rear seat in the TrailBlazer or in the left rear quarter panel storage compartment in the TrailBlazer EXT. To release the jack from its holder, turn the knob on the jack counterclockwise to lower the jack head.
The tools you'll be using include the wheel wrench (A), tire blocks (B), extension(s) (socket end) (C), handle (jack end) (D), and jack (E). The Trailblazer EXT will include an additional extension
The following instructions explain how to remove the spare tire mounted underneath your vehicle.
Notice: If you remove or restow a tire from/to the storage position under the vehicle while it is supported by a jack, you could damage the tire and/or your vehicle. Always remove or restow a tire when the vehicle is on the ground.
If the spare tire does not lower to the ground, the secondary latch is engaged causing the tire not to lower. See "Secondary Latch System" later in this section.
When the tire has been completely lowered, tilt the retainer at the end of the cable and pull it through the wheel opening. Pull the tire out from under the vehicle.
Notice: If you drive away before the spare tire or secondary latch system cable has been reinstalled, you could damage your vehicle. Always reinstall this cable before driving your vehicle.
See "Removing the Flat Tire and Installing the Spare Tire" later in this section to continue changing the flat tire.
Your vehicle has an underbody mounted tire hoist assembly equipped with a secondary latch system. It's designed to stop the spare or flat road tire from suddenly falling off your vehicle if the cable holding the spare tire is damaged. For the secondary latch to work, the tire must be stored with the valve stem pointing up. See "Storing a Flat Tire and Tools" for instructions on storing the spare or flat tire correctly.
Caution: Before beginning this procedure read all the instructions. Failure to read and follow the instructions could damage the hoist assembly and you and others could get hurt. Read and follow the instructions listed next.
Caution: Someone standing too close during the procedure could be injured by the jack. If the spare tire does not slide off the jack completely, make sure no one is behind you or on either side of you as you pull the jack out from under the spare.
To release the spare tire from the secondary latch do the following:
If visible, first try to tighten the cable by turning the wheel wrench clockwise until you hear two clicks or feel it skip twice. You cannot overtighten the cable.
If the spare tire lowers to the ground, continue with Step 2 of "Removing the Spare Tire and Tools" earlier in this section.
Have the hoist assembly inspected as soon as you can. You will not be able to store a spare or flat tire using the hoist assembly until it has been repaired or replaced.