Gates K040365SF Serpentine Belt - Air Conditioning

Gates Stretch Fit Belt for CTS

The Gates K040365SF is a Premium OE Stretch Fit Micro-V Belt built for stretch-fit accessory drive systems that require precise belt tension without a conventional tensioner. It is a 4-rib automotive V-ribbed belt made with EPDM and nylon cord reinforcement for stable operation in the accessory drive system.

Fits 2009-2015 Cadillac CTS, Air Conditioning. This Gates serpentine belt is a direct-fit option for Cadillac CTS air conditioning drive applications that use a stretch-fit design.

Key Features

• Premium OE Stretch Fit Micro-V Belt for stretch-fit drive systems
• Part number K040365SF
• 4-rib K-section design
• EPDM belt construction with nylon cord material
• Effective length: 36.58 in. (929 mm)
• Outside circumference: 37.125 in. (943 mm)
• OE Exact and OE Performance comparison ratings
• Installation tool requirement: 3 mm zip tie

Product Details

Gates Micro-V Stretch Fit Belts use self-tensioning technology to match the requirements of unique stretch-fit accessory drive systems. The K040365SF is specified for the Cadillac CTS air conditioning position across 2009-2015 model years, making it a focused replacement for vehicles that use this belt layout. Gates continues to expand coverage in this segment, and this belt cross-references Continental 4040382S for the same application. Search terms such as 2009 Cadillac CTS AC belt, 2010-2015 Cadillac CTS serpentine belt, and Gates K040365SF help identify the correct fitment quickly.

What This Belt Helps Address

• Squealing or slipping from a worn accessory drive belt
• Cracking, glazing, or fraying on the existing belt surface
• Loss of proper drive for the air conditioning compressor
• Incorrect belt fitment on stretch-fit CTS applications
• Noise caused by belt wear in the accessory drive system

Installation Notes

Use the specified 3 mm zip tie installation method and follow Sheet J instructions for proper fitment. Stretch-fit belts are installed differently than standard serpentine belts, so correct procedure matters for belt seating and final tension. Verify the vehicle is a 2009-2015 Cadillac CTS with the air conditioning application before installation.

Quality Assurance

Gates builds this Premium OE Stretch Fit Micro-V Belt for OE-style fit and performance in stretch-fit systems. The EPDM belt material and nylon cord construction support consistent operation in the accessory drive system, and the OE Exact/OE Performance ratings reflect its application-focused design.