2014 Chevrolet Silverado 2500HD Serpentine Belt Routing, Length & Part Numbers

As an ASE-certified master technician, I’ve replaced countless drive belts on heavy-duty trucks. If you are working on a 2014 Chevrolet Silverado 2500HD, it’s critical to get the right parts and route the belt perfectly to ensure your truck's accessories run flawlessly under load.

Note: The following information primarily covers the highly popular 6.0L V8 Gas (L96) engine. If your truck is equipped with the 6.6L Duramax V8 Diesel, part numbers and routing will differ, particularly due to the dual-alternator options often found on the diesel.

Quick Answer: 2014 Chevy Silverado 2500HD (6.0L V8) Belt Specs

• Belt Length: 93.5 inches (Primary Drive Belt)
• Rib Count: 6-rib
• OEM Belt Part Number: ACDelco 6K935 (GM 12626222)
• Aftermarket Cross-References: Gates K060935, Dayco 5060935, Continental Elite 4060935
• Auto-Tensioner Part Number: ACDelco 38158
• Idler Pulley Part Number: ACDelco 38008

(Note: The 6.0L V8 engine utilizes a primary 6-rib serpentine belt for most accessories, and a separate, smaller 4-rib belt for the A/C compressor located low on the passenger side.)

Belt Routing

Pro-Tip: Before you remove the old belt, take a clear photo of the existing routing with your smartphone. It will save you a lot of second-guessing later!

For the primary 6-rib drive belt on the 6.0L V8, follow this text-based routing path:

1. Start at the Crankshaft Pulley (the large pulley at the bottom center).
2. Route the belt up and over the Water Pump Pulley (smooth pulley in the center of the engine block).
3. Bring the belt down and under the Power Steering Pump Pulley (lower driver's side).
4. Pull the belt straight up and over the Alternator Pulley (top driver's side).
5. Run the belt across the top of the engine, under the smooth Idler Pulley (top passenger side).
6. Route it around the Automatic Tensioner Pulley (mid passenger side).
7. Finally, pull the tensioner to slip the belt back onto the Crankshaft Pulley.

How to Replace the Serpentine Belt

Replacing the primary serpentine belt on your 2014 Silverado 2500HD is a straightforward job that can be completed in your driveway.

1. Locate the Tensioner: Find the automatic belt tensioner on the passenger side of the engine block, just below the idler pulley.
2. Release the Tension: Use a dedicated serpentine belt tool or a standard 3/8" drive breaker bar. Insert the square 3/8" drive directly into the square slot on the tensioner arm. Rotate the tensioner clockwise (toward the driver's side) to relieve tension on the belt.
3. Remove the Old Belt: Slip the belt off the easiest accessible pulley (usually the idler pulley or the alternator), then carefully release the tensioner back to its resting position. Remove the belt from the engine bay.
4. Inspect the Pulleys: Spin the idler pulley, tensioner pulley, alternator, and water pump by hand. They should spin smoothly with no grinding, squeaking, or wobble. If the tensioner feels weak or the pulleys are noisy, replace them now.
5. Install the New Belt: Route the new belt exactly as described in the routing section above, leaving the tensioner or idler pulley for last.
6. Apply Tension: Crank the tensioner with your breaker bar, slip the belt over the final pulley, and slowly release the tensioner. Double-check every pulley to ensure the ribs of the belt are seated properly in the grooves.

Replacement Interval

For the 2014 Chevrolet Silverado 2500HD, the standard replacement interval for the serpentine belt is every 60,000 to 90,000 miles, or every 5 years, whichever comes first. However, if your truck sees heavy towing, plowing, or harsh off-road/dusty environments, you should inspect the belt every 30,000 miles. EPDM belts (like modern OEM and premium aftermarket belts) don't crack as noticeably as older neoprene belts; instead, they lose rib material like a worn tire.

Signs of a Failing Belt or Tensioner

Don't wait for a breakdown on the highway. Look out for these warning signs:

• Squealing or Chirping: A high-pitched noise upon startup or acceleration usually points to a stretched belt, a weak tensioner spring, or a failing pulley bearing.
• Visible Wear: Look for fraying edges, deep cracks, missing rib chunks, or a glazed/shiny appearance on the belt surface. Use a belt wear gauge to check groove depth.
• Heavy Steering or Overheating: If the belt is slipping, your power steering pump and water pump won't spin at the correct speed, leading to heavy steering effort and engine temperature spikes.
• Tensioner Bounce: With the engine running, observe the tensioner. A slight vibration is normal, but excessive bouncing or chattering indicates the internal damper has failed.

If you don't feel comfortable tackling this repair yourself, don't worry. Find a trusted shop on Repairius.