Four Seasons 74603 Heater Valve 1971-1973 Buick Cadillac Pontiac AC NORS

Genuine Four Seasons 74603 Heater Valve (NORS)

Restore the cooling efficiency of your classic GM vehicle with this genuine Four Seasons 74603 Heater Valve. This is a vintage New Old Replacement Stock (NORS) part, manufactured in the USA. It is a vacuum-operated valve designed specifically for full-size GM luxury cars equipped with factory air conditioning.

This part is designed for the Heater Control position on specific 1971-1973 Buick, Cadillac, and Pontiac vehicles equipped with Air Conditioning.

Key Features:

• Part Number: 74603 (Four Seasons)
• Interchange Part: H1946
• Position: Heater Control
• Engine Fitment: V8
• Origin: Made in USA (Vintage Stock)
• Condition: NORS (New Old Replacement Stock)

Verified Vehicle Fitment:

Fits Years:

1971 1972 1973

Product Note: Vintage Stock Photos

This listing uses stock images for reference. Because these are NORS (New Old Replacement Stock) parts manufactured decades ago, the item you receive may have cosmetic differences from the photo, such as:

• Packaging: Box styles, colors, or condition may vary (or item may be bulk packed).
• Finish: Materials, colors, or plating may vary between production runs.
• Shelf Wear: Minor cosmetic signs of age are normal for vintage parts.

Rest assured, the Part Number (74603) and Fitment specifications are verified to be 100% correct for the vehicles listed.

Unbeatable Prices & Expectations

We scour the country to find the best deals on NOS and NORS parts so we can pass the savings on to you. Our prices are often significantly lower than major competitors.

Please Note: While we verify fitment to the best of our ability using vintage catalogs, there can be variations. We strongly recommend comparing our photos and specs to your original part before purchasing.