2022 GMC Acadia Serpentine Belt Routing & Part Numbers

Quick Answer

• Belt Length: Varies by engine (see below)
• Rib Count: 6-rib
• OEM Belt Part Number: Varies by engine (see below)
• Aftermarket Cross-references:
  • Gates K06xxxx (varies by engine)
  • Dayco 506xxxx (varies by engine)
  • Continental Elite 406xxxx (varies by engine)
• Auto-Tensioner Part Number: Varies by engine (see below)
• Idler Pulley Part Number: Varies by engine (see below)

The 2022 GMC Acadia came with a few engine options, and the serpentine belt configuration will vary depending on which engine your particular vehicle has. Always verify part numbers with your VIN to ensure correct fitment.

Belt Routing

Before you begin, always take a clear photo of the existing belt routing. This will be an invaluable reference during reinstallation.

For 2.0L LSY Engine

Starting from the crankshaft pulley:

1. From the crankshaft pulley, the belt routes up to the A/C compressor pulley.
2. From the A/C compressor, it then goes over the top of the idler pulley.
3. From the idler pulley, the belt routes down to the alternator pulley.
4. From the alternator, it continues up and over the power steering pump pulley.
5. From the power steering pump, the belt goes down to the water pump pulley.
6. Finally, from the water pump, the belt routes under the auto-tensioner pulley.

For 3.6L LGX Engine

Starting from the crankshaft pulley:

1. From the crankshaft pulley, the belt routes up to the A/C compressor pulley.
2. From the A/C compressor, it then goes over the top of the idler pulley.
3. From the idler pulley, the belt routes down to the alternator pulley.
4. From the alternator, it continues up and over the power steering pump pulley.
5. From the power steering pump, the belt goes down to the water pump pulley.
6. Finally, from the water pump, the belt routes under the auto-tensioner pulley.

How to Replace the Serpentine Belt

Replacing the serpentine belt on your 2022 GMC Acadia generally requires a serpentine belt tool or a 3/8" breaker bar to relieve tension on the auto-tensioner. The process typically involves:

1. Locate the auto-tensioner and the square drive opening (usually 3/8-inch).
2. Insert the serpentine belt tool or breaker bar into the tensioner's square drive.
3. Rotate the tensioner to relieve tension on the belt, and carefully slip the old belt off the pulleys.
4. Compare the new belt to the old one to ensure it's the correct length and rib count.
5. Route the new belt according to the diagram you photographed or the description above, ensuring it sits properly in all pulley grooves.
6. Once the new belt is mostly in place, use the tensioner tool or breaker bar again to fully seat the belt on the last pulley.
7. Slowly release the tensioner and double-check that the belt is correctly seated on all pulleys.
8. Start the engine briefly to ensure the belt is tracking correctly and there are no unusual noises.

Replacement Interval

GMC generally recommends inspecting the serpentine belt at every oil change and replacing it if signs of wear are present. Typically, serpentine belts are designed to last between 60,000 to 100,000 miles or about 4-6 years, whichever comes first. However, driving conditions and climate can affect its lifespan. It's always best to consult your owner's manual for specific maintenance schedules.

Signs of a Failing Belt or Tensioner

Ignoring a failing serpentine belt or tensioner can lead to significant problems, as the belt drives crucial components like the alternator, power steering pump, and A/C compressor. Here are common signs to watch for:

Failing Serpentine Belt

• Squealing or Chirping Noises: This is one of the most common signs, especially during cold starts or when the engine is under load. It indicates slipping due to wear or improper tension.
• Cracks, Fraying, or Glazing: Visually inspect the belt for any signs of damage. Cracks on the ribbed side, fraying edges, or a shiny, glazed appearance on the flat side are all indicators it needs replacement.
• Loss of Power to Accessories: If the belt is slipping or broken, you might notice issues like dimming headlights (alternator), heavy steering (power steering), or the A/C not blowing cold (A/C compressor).
• Overheating: A failed water pump due to a broken belt can quickly lead to engine overheating.

Failing Auto-Tensioner

• Belt Squeal: A failing tensioner can cause the belt to be too loose or too tight, leading to squealing noises.
• Vibration or Rattle: A worn tensioner pulley bearing or a weak spring can cause vibrations or rattling noises coming from the tensioner assembly.
• Misalignment: The tensioner pulley should be perfectly aligned with the other pulleys. If it's visibly crooked or wobbly, it's likely failing.
• Belt Slipping Off: In extreme cases, a completely failed tensioner won't keep the belt properly tensioned, allowing it to slip off the pulleys entirely.

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