Buick, Olds, Pontiac, GM, Cadillac 1933-1956 underseat heater Core

Buick, Olds, Pontiac, GM, Cadillac 1933-1956 underseat heater Core

HC round underseat accordion

$799.00

This was presented for duplication as a 1933-1956 Buick round underseat heater core. We find the same underseat heaters in Oldmobile, Pontiac, and Cadillac. Price is for a single core. The cores are under the passenger and driver seat. We make these in a tube and fin core or a time saving/cost saving design with an accordion pattern.

We do not keep this heater core in stock & will need to fabricate it. Our build queue varies and you should confirm dimensiosn and/or provide a pattern.

Replacement: OD 13 1/2", ID 8 1/2", depth 1"

5/8" connections with 1 1/4" c-to-c

Reference Part Nos 3115648, 3122465, 3126103, 3128403, 3130560, 3131633, 3132055

Present Lead times.

Made in the USA

We make to order. Please allow adequate time for us to build.

Build time estimates [April 23, 2026]

Model Ts Brass 18 weeks

Model Ts Black 13 weeks

Model As 17 weeks

Heater cores ~11 weeks

1928-34 Ford Hot rods 2-3 weeks

Common street rods ~12-15 weeks

Tricky customs & complicated restorations ~20-25 weeks

We appreciate your patience as we continue to recruit and train new fabricators and manage the labor shortfall our country has been experiencing.