Tools and Materials Needed
- Replacement Belt Tensioner
- Socket Wrench Set
- Ratchet
- Extension Bar
- Torque Wrench
1. Prepare Your Vehicle. Park your GMC Jimmy on a level surface and engage the parking brake. Open the hood and allow the engine to cool down if it has been running.
2. Locate the Belt Tensioner. The serpentine belt tensioner is usually located on the front of the engine, near the top. It is a metal arm held by a bolt and a nut.
3. Loosen the Tensioner Bolt. Use a socket wrench to loosen the bolt holding the tensioner arm in place. Be careful not to drop the bolt.
4. Slide the Tensioner Arm Off. Once the belt tensioner bolt is loosened, you can slide the arm off of the belt tensioner stud. Set it aside.
5. Install the New Tensioner Arm. Slide the new tensioner arm onto the stud. Make sure that it is properly seated and that the belt is aligned properly.
6. Tighten the Tensioner Bolt. Use the socket wrench to tighten the tensioner bolt until it is snug. Do not overtighten the bolt, as this can damage the tensioner.
7. Start the Engine and Test the Belt. Start the engine and let it run for a few minutes. Listen for any unusual noises coming from the belt area. If you hear any noise, turn off the engine and check the belt and tensioner for proper alignment and tightness.
8. Double-Check the Torque. Use a torque wrench to check the torque of the tensioner bolt and ensure it is within the manufacturer's specifications, usually around 20 ft-lbs.
Remember to follow the manufacturer's guidelines and specific instructions for your GMC Jimmy model. It's also a good idea to consult with a licensed mechanic if you feel unsure about performing any vehicle maintenance or repair tasks.
