1. Park your Montana in a safe location and turn off the engine.
2. Open the hood of your Montana.
3. Locate the battery. It is usually located in the engine compartment on the driver's side.
4. Disconnect the negative battery terminal. Use a wrench to loosen the nut that holds the negative terminal cable to the battery. Be careful not to drop the nut into the battery well.
5. Disconnect the positive battery terminal. Use a wrench to loosen the nut that holds the positive terminal cable to the battery. Be careful not to touch the positive terminal with the negative terminal cable or any other metal object, as this could create a spark.
6. Remove the old battery. Once the terminal cables are disconnected, you can remove the old battery from the engine compartment. Be careful not to drop the battery.
7. Clean the battery tray. Use a wire brush to clean the battery tray and remove any corrosion.
8. Place the new battery in the battery tray. Make sure that the positive terminal of the new battery is facing the positive terminal on the battery tray.
9. Connect the positive battery terminal. Use a wrench to tighten the nut that holds the positive terminal cable to the battery. Be careful not to overtighten the nut.
10. Connect the negative battery terminal. Use a wrench to tighten the nut that holds the negative terminal cable to the battery. Be careful not to overtighten the nut.
11. Close the hood of your Montana.
12. Start your Montana and check the battery voltage. The battery voltage should be between 13.5 and 14.5 volts.
This completes the process of replacing the battery in a 2001 Pontiac Montana.