2020+ Duramax Fuel Cooler w/ Coolant Passage (84740502)

The Industrial Injection 84740502 is a direct OEM-replacement fuel cooler with an integrated coolant passage for the 2020+ L5P Duramax Silverado/Sierra 2500HD/3500HD. The coolant passage routes engine coolant through the cooler body to manage fuel temperature under high-load conditions, holding rail-feed temps stable on heavy-tow and high-output trucks where the factory unit can struggle.

• Direct OEM-spec replacement — precise factory fitment
• Integrated coolant passage for thermal management
• Built to handle elevated fuel pressures
• Maintains stable fuel temps under high load and tow
• Mounting hardware included