How to Look for Wear or Cracks on Belts in a GMC Sierra
- 1). Allow your engine to cool off before starting your inspection. Wait at least 30 minutes after driving your GMC Sierra to ensure the engine and components have had time to cool completely.
- 2). Pop the hood of your GMC Sierra. Most trucks just have one serpentine belt that runs all the engine components. You can find this belt near the alternator, water pump or power steering pump. It may also attach to the air conditioning compressor, although some trim lines do have a separate belt running the A/C.
- 3). Perform a visual inspection once you've located the serpentine belt. A good belt will be somewhat textured. Some signs that a belt needs replacing include fraying, missing chunks or a glossy appearance. Also, look for oil on the belt, which could be a sign of a leaking head gasket or other oil leak and requires belt replacement.
- 4). Feel the belt with your hands. It should have a consistent texture throughout the length of the belt. If you feel any cracks or gouges, you should get the belt replaced. You should also replace the belt in your GMC Sierra if it feels very smooth or glazed, as this is a sign that the belt is wearing out.
- 5). Try to inspect as much of the length of the belts in your GMC Sierra as possible, so you can catch any damage before the belt wears completely out and breaks. If there's any sign of cracking, fraying or wear, replace the belt immediately.
- 6). Close the hood of your GMC Sierra and lock it into place. Consider your findings and proceed accordingly.
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