Gates K040344SF Serpentine Belt - Air Conditioning

OE Stretch Fit Belt for Accessory Drive Systems

The Gates K040344SF Premium OE Stretch Fit Micro-V Belt is built for stretch-fit accessory drive systems that require precise belt length and stable operation. It uses Gates self-tensioning stretch-fit technology to deliver a direct OE-style replacement for select Chevrolet Express and GMC Savana air conditioning applications.

For buyers searching for a Chevrolet Express 2500 serpentine belt, GMC Savana 3500 A/C belt, or Gates K040344SF replacement, this belt matches the OE-style stretch fit design used on specific van platforms.

• Premium OE Stretch Fit Micro-V Belt
• Part number: K040344SF
• 4-rib automotive V-ribbed belt, stretch fit design
• EPDM belt material for heat and wear resistance
• Nylon cord construction for strength and dimensional stability
• OE comparison rating: OE Exact and OE Performance
• Cross references: 4K344SF, 25-040344SF

Product Line Details

Gates Micro-V Stretch Fit Belts are made for unique drive systems that do not use a conventional tensioner. The stretch-fit construction is engineered to install to the correct operating length and maintain proper belt engagement in applications that call for an OE-style replacement belt. The K040344SF follows that product line approach for select GM air conditioning drives.

Fitment

• Fits 2021-2025 Chevrolet Express 2500, Air Conditioning
• Fits 2021-2025 Chevrolet Express 3500, Air Conditioning
• Fits 2025 Chevrolet LCF 3500HG, Air Conditioning
• Fits 2022-2025 GMC Savana 2500, Air Conditioning
• Fits 2022-2025 GMC Savana 3500, Air Conditioning
• Fits 2018-2021 GMC Savana 2500, Air Conditioning
• Fits 2018-2021 GMC Savana 3500, Air Conditioning
• Fits 2018-2020 Chevrolet Express 2500, Air Conditioning
• Fits 2018-2020 Chevrolet Express 3500, Air Conditioning

What This Belt Helps Address

• Squealing or slipping from a worn A/C drive belt
• Cracking, glazing, or fraying on the existing belt
• Incorrect belt length on stretch-fit accessory drives
• Poor belt tracking on the air conditioning drive system
• Loss of proper accessory drive operation in GM van applications

Installation Notes and Tips

Installation tool required for proper fitment on the listed applications. Verify the belt routing and confirm the vehicle’s accessory drive configuration before installation. Because this is a stretch-fit belt, correct installation method is important to achieve proper seating and belt performance. Use the part number K040344SF to confirm the exact replacement before ordering.

Quality Assurance

Gates manufactures this belt as an OE-style replacement for stretch-fit drive systems and backs it with the brand’s Micro-V belt engineering for consistent fit and performance in the specified applications.