2024 GMC Yukon Serpentine Belt & Routing

Quick answer

• Serpentine Belt Length: 105.0 inches (2667 mm)
• Rib Count: 6-rib
• OEM Belt Part Number: 12720612
• Aftermarket Belt Part Numbers: Gates K061050, Continental 4061050, Dayco 5061050
• Automatic Tensioner Part Number: 12690342
• Idler Pulley Part Number: 12685773

Belt routing

Before you remove the old belt, use your phone to take a quick photo of the belt's path for reference. The serpentine belt on a 2024 GMC Yukon with the 5.3L or 6.2L V8 engine follows this path:

1. Starts at the crankshaft pulley at the bottom of the engine.
2. Wraps around the A/C compressor.
3. Goes up and around the idler pulley.
4. Travels over the top of the alternator.
5. Comes down and around the power steering pump.
6. Goes across the water pump.
7. Finally, loops under the tensioner pulley before returning to the crankshaft.

How to replace the serpentine belt

To replace the serpentine belt, you will need a serpentine belt tool or a long-handled 3/8" drive breaker bar. Insert the square drive of the tool into the corresponding square hole on the face of the automatic tensioner assembly. Rotate the tensioner clockwise to release the tension on the belt. While holding the tensioner, slip the old belt off of a smooth pulley, like the idler or water pump pulley. Slowly release the tensioner. Route the new belt around all of the pulleys except for the last one, then use your tool to rotate the tensioner again while you slip the new belt into place. Double-check that the belt is correctly seated in all of the ribbed pulleys.

Replacement interval

The recommended replacement interval for the serpentine belt on a 2024 GMC Yukon is typically every 60,000 to 100,000 miles, or as recommended in your owner's manual. However, it is important to inspect the belt regularly for signs of wear and tear.

Signs of a failing belt or tensioner

• Squealing or chirping noises: This is the most common sign of a worn or loose belt.
• Visible wear and tear: Look for cracks, fraying, or glazing on the belt.
• Tensioner noise: A rumbling or grinding noise from the tensioner indicates a failing bearing.
• "Bouncing" tensioner: Watch the tensioner with the engine running. If it is bouncing or vibrating excessively, it may be weak and unable to maintain proper belt tension.
• Overheating or loss of power steering: A broken belt will cause the water pump and power steering pump to stop working, leading to rapid overheating and a loss of power steering assist.

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