Goodyear Serpentine Belt 5-Rib 40.5" (5PK1029) — EPDM Rubber, Polyester Cord for GM

The Goodyear Belts 1050405 is a 5-rib serpentine belt (40.5" / 1029 mm, part 5PK1029) engineered to restore reliable accessory drive performance with EPDM rubber and a balanced-twist polyester cord.

When a stretched, glazed, or cracked serpentine belt starts to slip, replace it with a belt built to meet or exceed original equipment specifications. The Goodyear 1050405 multi V-belt combines modern EPDM compound resistance with a reinforced polyester cord to deliver quiet operation, extended wear life, and consistent power transfer for compatible GM vehicles.

How does this belt improve my vehicle's accessory drive performance?

The 1050405 maintains proper tension and grip across pulleys, reducing slippage and accessory noise. Its EPDM compound resists heat and ozone, while the balanced-twist polyester cord preserves tensile strength so the belt retains its shape under load.

• 5-rib profile for stable contact on multiple pulleys
• EPDM rubber resists heat, ozone, and abrasion
• Balanced-twist polyester cord improves longevity and tension retention
• Designed to meet or exceed OE fit and performance

Which vehicles and part numbers are compatible with this belt?

The 1050405 fits a range of GM models across Buick and Chevrolet model years listed by manufacturers. It’s identified as 5PK1029 in some catalogs, so cross-reference that alternate part number for compatibility when shopping.

• Fits Buick: LaCrosse (2011), Regal (2012, 2015–2017), Verano (2012–2017, 2013–2016)
• Fits Chevrolet: Captiva Sport (2008–2010), Classic (2004–2005), Cobalt (2007–2010), and various Chevrolet models 2010–2017
• Alternate part number: 5PK1029
• Length specification: 40.5 inches (1029 mm)

What materials and design features extend the belt's service life?

EPDM rubber provides superior resistance to environmental degradation compared with older rubber compounds, meaning fewer cracks and less hardening. The balanced-twist polyester cord runs down the center of the belt to carry load and minimize elongation, keeping accessory alignment and performance stable over time.

• EPDM compound reduces abrasion and ozone cracking
• Polyester cord offers high tensile strength and low stretch
• Multi V-rib geometry spreads contact pressure evenly
• Manufactured to OE tolerances for consistent pulley fit

How should I install and maintain this serpentine belt for best results?

Install using a proper belt routing and tensioning procedure; if your vehicle uses an automatic tensioner, verify the tensioner condition and replace if worn. Regularly inspect the belt for glazing, cracks, or uneven wear and confirm pulley alignment to avoid premature failure.

• Follow vehicle routing diagram and torque specs
• Check and, if needed, replace the tensioner and idler pulleys
• Inspect belt edges and ribs every oil change interval
• Replace belt at first signs of cracking, fraying, or glazing

Who is this for: The Goodyear 1050405 (5PK1029) is aimed at DIY mechanics, professional technicians, and vehicle owners who drive compatible Buick and Chevrolet models and need a durable, OE-grade serpentine belt replacement. It’s ideal when you want a direct-fit belt with modern EPDM durability and reinforced cord construction to maintain quiet, reliable accessory drive operation.