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The Wehrli billet aluminum heater core firewall fitting replaces the common failure-prone plastic GM fitting on Duramax and other GM vehicles. Made in the USA as a direct-fit billet replacement, it resists heat and vibration, includes a clear anodized finish, double O-ring seal, and fits the OEM connection to prevent leaks. It replaces GM/AC Delco part number 15032062 for a more durable service item.
Wehrli 99-23 GM Billet Coolant Heater Core Firewall Fitting
