Here's a general overview, but this is NOT a substitute for a proper repair manual:
1. Safety First:
* Disconnect the negative battery terminal. This prevents accidental short circuits.
* Let the engine cool completely. A hot engine can cause burns.
* Use jack stands. Never work under a car supported only by a jack.
* Wear safety glasses.
2. Locating the Tensioner:
The tensioner pulley is usually located on the bottom-front of the engine, near the crankshaft pulley and alternator. It's a small pulley with a lever or mechanism to adjust tension on the belt. Look for a visible lever or a bolt head that can be turned.
3. Accessing the Tensioner (General Steps):
* Identify the tensioner: Locate the tensioner pulley and its release mechanism.
* Use the right tool: You'll likely need a socket wrench (the size will depend on the tensioner design; some use a special tool). A ratchet is highly recommended. Some tensioners require a special tool for proper release.
* Release the tension: Carefully turn the tensioner lever or bolt (counterclockwise is usually the direction to loosen tension). The exact method depends on your specific model and tensioner design. Be cautious, the belt will be under pressure and could spring loose. Have a helper if possible to assist.
* Remove the belt: Once the tension is released, carefully remove the serpentine belt by sliding it off the pulleys.
4. Replacing the Pulley (if necessary):
* Removing the old pulley: This might involve removing bolts securing the pulley to the tensioner.
* Installing the new pulley: Install the new pulley, ensuring it is properly seated and bolts are tightened to the manufacturer's specifications (check your repair manual).
5. Reinstalling the Belt and Tensioner:
* Install the new belt: Carefully route the new serpentine belt back onto all the pulleys. Pay attention to the routing – a diagram in your repair manual is essential.
* Retighten the tensioner: Tighten the tensioner lever or bolt to the correct specifications in your repair manual. The belt should be snug, but not excessively tight. Too much tension can damage the bearings in the tensioner, alternator, or other components.
Again, this is a general overview. Do NOT attempt this repair without a repair manual specific to your 1995 Pontiac Grand Am. Improperly tightened belts or damaged tensioners can cause serious engine damage. If you are not comfortable with this type of repair, it's best to take your car to a qualified mechanic.
