Gates K040940 Serpentine Belt

Gates Premium OE Micro-V Belt K040940

The Gates K040940 is a Premium OE Micro-V serpentine belt built for precise OE-style fit and consistent accessory drive performance. It uses EPDM belt material with a polyester cord construction and a 4-rib, K-section profile for applications that call for a standard automotive V-ribbed belt.

Compatible With select Chevrolet and GMC vans, trucks, and utility vehicles from 1987-1991, including Chevrolet Astro, G10, G20, G30, C1500, C2500, C35, C3500, K1500, K2500, K3500, and GMC Safari, G1500, G2500, G3500, C1500, C2500, C3500, K1500, K2500, K3500. This part cross-references Bando 4PK2390 for the same application.

Key Features

• Gates Premium OE Micro-V Belt line for OE-size, OE-construction replacement
• Part number K040940 for accurate ordering and application matching
• 4-rib automotive V-ribbed belt design
• EPDM belt material for durability in accessory drive service
• Polyester cord reinforcement for stable belt structure
• Effective length: 94.04 in. (2389 mm)
• Outside circumference: 94.625 in. (2403 mm)
• Top width: 0.56 in. (14 mm)

Product Details

Gates Micro-V belts are engineered to match OE size, construction, and materials so the belt tracks correctly in the accessory drive system. The K040940 is a standard automotive serpentine belt with a K cross section and OE performance rating, making it a direct-spec replacement for vehicles that use this belt length and rib count. For shoppers searching by fitment, this belt is commonly selected for 1987-1991 Chevrolet Astro and 1987-1991 GMC Safari without air conditioning and with automatic tensioner pulley, along with related Chevrolet and GMC van and truck applications.

What This Belt Helps Address

• Squealing or chirping from a worn serpentine belt
• Cracking, glazing, or rib wear on the accessory drive belt
• Loss of proper drive to alternator, water pump, or other belt-driven accessories
• Incorrect belt length or profile on OE-style replacement service
• Fitment issues on 1987-1991 Chevrolet and GMC applications with automatic tensioner pulley

Installation Notes and Tips

Verify the belt routing, rib count, and measured length before installation. This application is listed for vehicles without air conditioning and with an automatic tensioner pulley, so confirm the accessory drive configuration on the vehicle before ordering. Inspect pulleys and tensioner components for wear, contamination, or misalignment before installing the new belt. The part number K040940 should be matched to the vehicle’s OE specification and belt path.

Quality Assurance

Gates positions the Premium OE Micro-V Belt line as an OE-style replacement built to the same size, construction, and material standards used in original equipment service. The K040940 is specified as an OE Performance belt for consistent fitment in supported Chevrolet and GMC applications.