Wehrli · New
Wehrli 99-23 GM Billet Coolant Heater Core Firewall Fitting
MPN WCF100155 · Store SKU wcfWCF100155
Supplier stock checked 11/8/2026, 8:23:44 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
The factory plastic GM Coolant Heater Core Firewall Fitting is a common failure point on Duramax trucks and other GM vehicles. Our made in the USA, billet aluminum direct-fit replacement is more resistant to heat and vibration. Prevent leaks with this easy to install upgrade. Replaces GM/AC Delco Part Number 15032062 Wehrli Custom Fab Fitting Kit, GM Heater Core Quick Connect, Straight, Billet Fitting Kit, GM Heater Core Quick Connect, Straight, Billet
Manufacturer fitment & guides
Check WCF100155 against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- California Proposition 65: Y