1. Preparation:
* Park safely: Ensure the vehicle is parked on a level surface, the engine is off, and the parking brake is engaged.
* Gather tools: You'll need a wiper arm puller tool. This is crucial to prevent damage. While some people try to pry them off with screwdrivers, this is risky and can easily scratch the windshield or damage the wiper arm. A proper puller spreads the pressure evenly. If you don't have one, get one from an auto parts store; it's a cheap and worthwhile investment.
* Protect the windshield: Consider placing a soft cloth or towel between the puller and the windshield to further reduce the risk of scratches.
2. Procedure:
* Locate the wiper arm nut: With the wiper arms in the resting position, look closely at the base of each arm where it connects to the spindle. You should see a nut (or possibly a bolt, though less likely). This nut is usually small and may be hidden under a plastic cap. If there is a cap, carefully remove it.
* Loosen the nut: Use a wrench that fits the nut (usually a small socket wrench) and carefully loosen it. *Do not remove it completely yet*. Just loosen it enough to allow movement.
* Position the wiper arm puller: Carefully place the claws of the wiper arm puller on the wiper arm, ensuring that they are securely gripping the arm near the base.
* Tighten the puller: Following the instructions for your specific puller, tighten the puller's central screw. This will create pressure on the wiper arm, separating it from the spindle.
* Remove the nut: Now, with the puller holding the arm, completely remove the nut.
* Remove the wiper arm: Gently pull the wiper arm straight up and off the spindle. It may require a little firm but even pressure.
* Repeat for the other arm: Follow the same steps for the second wiper arm.
3. Reassembly (when reinstalling):
* Clean the spindle before re-installing the wiper arms.
* Ensure the wiper arms are correctly aligned before tightening the nut.
Important Considerations:
* Stubborn nuts: If the nut is exceptionally stubborn, try using penetrating oil (like PB Blaster) to loosen it before attempting to remove it. Allow time for the oil to penetrate.
* Spindle damage: If the spindle is damaged or bent, the wiper arm may not fit back properly. Be careful not to force it.
* Wiper arm type: Some wiper arms have a different release mechanism. While most will use a nut, some may have a different fastening method. A visual inspection is key.
* Year-specific differences: While the general procedure remains the same, there might be subtle differences between individual 1985 Suburban models. It is always a good idea to consult a repair manual specific to your vehicle year and model if you encounter difficulty.
If you are uncomfortable performing this task, it is always best to take your vehicle to a qualified mechanic. Damaged wiper arms or a scratched windshield can be costly to repair.
