2016 Chevrolet Silverado 3500HD Serpentine Belt Routing & Replacement

Quick Answer

For your 2016 Chevrolet Silverado 3500HD, the serpentine belt system depends on your engine. Most 3500HD models came with the 6.0L V8 gasoline engine (RPO L96) or the 6.6L Duramax Diesel engine (RPO LML). We'll focus on the more common 6.0L V8 gasoline engine. Always verify your engine code before purchasing parts.

2016 Chevrolet Silverado 3500HD 6.0L V8 (L96) Gasoline Engine:

• Belt Length: Approximately 2245mm (88 inches)
• Rib Count: 6-rib
• OEM Belt PN: AC-Delco 6K888 (This is a common cross-reference for the OEM part, always double-check with your VIN for the exact GM PN)
• Aftermarket Cross-References:
  • Gates K060888
  • Dayco 5060888
  • Continental Elite 4060888
• Auto-Tensioner PN: Gates 38159 (or equivalent AC-Delco/Dayco/Continental)
• Idler Pulley PN: Gates 36173 (or equivalent AC-Delco/Dayco/Continental)

Belt Routing

The serpentine belt on your 2016 Chevrolet Silverado 3500HD with the 6.0L V8 engine snakes its way around several accessories. Before you begin any removal, it is highly recommended to take a clear photograph of your current belt routing. This will serve as an invaluable guide during reinstallation.

Here's a step-by-step description of the routing path for the 6.0L V8 engine, typically viewed from the front of the truck:

1. Begin at the crankshaft pulley (the largest, lowest pulley, directly driven by the engine). The belt will come off the top of the crankshaft pulley.
2. From the crankshaft pulley, the belt typically travels down and to the left (driver's side) to route under the A/C compressor pulley.
3. From the A/C compressor, the belt goes up and to the right over the top of an idler pulley (a smooth pulley that guides the belt).
4. The belt then travels down from the idler pulley and routes over the alternator pulley (usually high on the passenger side).
5. From the alternator, the belt moves down and to the left to route under the power steering pump pulley.
6. After the power steering pump, the belt goes up and to the right to route over the water pump pulley.
7. Finally, from the water pump, the belt goes down to engage with the automatic tensioner pulley. The tensioner will have an arm that pivots, maintaining the correct belt tension. The belt typically routes over the tensioner pulley.

Remember to verify this routing with a photo of your specific vehicle, as minor variations can occur.

How to Replace the Serpentine Belt

Replacing the serpentine belt on your Silverado is a manageable DIY task for most shade tree mechanics. You will need a serpentine belt tool (often a long wrench designed for this purpose) or a common 3/8" drive breaker bar or ratchet with the appropriate socket to fit the tensioner arm.

1. Safety First: Ensure the engine is off and cool. Disconnect the negative battery terminal to prevent accidental starting.
2. Locate the Tensioner: Identify the automatic belt tensioner. It will have a square hole or a bolt head where you can apply leverage.
3. Relieve Tension: Using your serpentine belt tool or breaker bar, apply counter-clockwise (or sometimes clockwise, depending on the tensioner design – you'll feel it release) rotational force to the tensioner arm. This will pivot the tensioner and loosen the belt.
4. Remove Old Belt: While holding the tensioner open, carefully slip the old belt off one of the pulleys (the easiest is usually the alternator or power steering pump).
5. Inspect Pulleys: With the belt off, take this opportunity to manually spin each pulley (alternator, A/C, power steering, idlers, water pump). Listen for grinding or squealing, and feel for excessive play or roughness. Replace any noisy or wobbly pulleys.
6. Route New Belt: Following your photograph and the routing description above, carefully route the new belt around all the pulleys except the tensioner or an easily accessible pulley like the alternator.
7. Final Tensioner Step: Apply the tool to the tensioner again, pivot it to the open position, and slip the new belt over the last pulley. Slowly release the tensioner, ensuring the belt seats correctly in all pulley grooves.
8. Double-Check: Visually inspect to make sure the belt is perfectly aligned in all grooves on all pulleys. Start the engine briefly and listen for any unusual noises. Turn it off and re-check tension and alignment.

Replacement Interval

For most modern vehicles, including your 2016 Chevrolet Silverado 3500HD, serpentine belts are designed for longevity. Generally, it's recommended to inspect the belt at every oil change and consider replacement every 60,000 to 100,000 miles, or every 5-7 years, whichever comes first. However, driving conditions and environmental factors can affect its lifespan. Always refer to your owner's manual for the most accurate factory-recommended interval.

Signs of a Failing Belt or Tensioner

Don't wait for a complete belt failure – it will leave you stranded! Be aware of these common indicators:

• Squealing or Chirping Noises: This is the most common sign. It often indicates a worn, stretched, or misaligned belt, or a failing tensioner/pulley.
• Visible Cracks, Fraying, or Glazing: Inspect the top and ribbed sides of the belt. Cracks, missing chunks, fraying edges, or a shiny, smooth (glazed) appearance are all signs of wear.
• Loss of Power Steering, A/C, or Charging: If the belt breaks or slips significantly, accessories like the power steering, air conditioning, and alternator will stop working.
• Battery Light On: A failing alternator (which relies on the serpentine belt) will trigger the battery warning light on your dashboard.
• Loose or Wobbly Tensioner/Idler Pulleys: When inspecting, if you notice excessive play or hear grinding from the tensioner or idler pulleys when the belt is off, they need replacement.
• Vibrations or Rattle: A failing tensioner can sometimes cause a rattling or vibrating noise as it struggles to maintain proper belt tension.

Address these symptoms promptly to avoid a breakdown or further damage to your engine's accessories.

Find a trusted shop on Repairius.