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Heater Control Valve, 1971-85 GM, 90-Degree Connector

Part# : 87A0023
Sold As: Each
Ship Size: Standard
Price Match: Eligible
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List Price: $32.95
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Estimated the week of 12/12/2026
Vehicle Specific View fitment for 11 models
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1971–85 Selected GM Models Vacuum Heater Control Valve (90°, 5/8-inch) by Four Seasons®

Vacuum-operated non-bypass heater valve with steel housing and 5/8-inch coolant hose ports.

This Four Seasons® vacuum-operated, non-bypass heater valve controls coolant flow to the heater core. Its steel body has two 5/8-inch hose ports and a 90-degree connection. Applications include selected 1971–75 Buick Electra, Estate Wagon, LeSabre and Riviera; 1973–75 and 1979–81 Century/Regal; 1971–76 Cadillac Calais, 1971–83 DeVille, 1971–84 Eldorado and 1971–85 Fleetwood (specific equipment); plus 1976 and 1980–84 Seville. Chevrolet applications include 1973 Chevelle, 1974–75 Malibu and Corvette and 1975 El Camino. Also fits selected 1975 Oldsmobile and 1971–80 Pontiac vehicles with the matching vacuum heater-control arrangement.

Features • Vacuum-operated, non-bypass heater shutoff valve • 90-degree connection; two 5/8-inch coolant hose ports • Steel body; pressure-tested by Four Seasons® • Selected Buick Century/Electra/Estate Wagon/LeSabre/Regal/Riviera and Cadillac Calais/DeVille/Eldorado/Fleetwood/Seville applications • Selected 1973–75 Chevrolet, 1975 Oldsmobile and 1971–80 Pontiac models with matching factory vacuum controls

We aim to provide accurate and complete product information. If you notice anything incorrect, missing, or unclear, please let us know.
WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Vehicle Fitment

Year Make Model Application Details
1971–1975 Buick Riviera Heater Control Valves - 90-degree connectors
1971–1976 Cadillac DeVille Heater Only - 90° Connectors
1979–1983 Cadillac DeVille  
1971–1976 Cadillac Eldorado Heater Only - 90° Connectors
1980–1984 Cadillac Eldorado  
1971–1976 Cadillac Fleetwood Heater Only - 90° Connectors
1979–1985 Cadillac Fleetwood  
1973–1975 Chevrolet Chevelle Heater - 90-degree connectors
1973–1975 Chevrolet El Camino Heater - 90-degree connectors
1973–1975 Chevrolet Monte Carlo Heater - 90-degree connectors
Heater - with 90° Connectors
1975 Oldsmobile Cutlass Heater - 90-degree connectors
1971–1976 Pontiac Bonneville Bonneville and Catalina (Heater Valves) - 90-degree connectors
1971–1976 Pontiac Catalina Bonneville and Catalina (Heater Valves) - 90-degree connectors
1973–1977 Pontiac Grand Prix Grand Prix (Heater Valves) - 90-degree connectors
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Heater Control Valve, 1971-85 GM, 90-Degree Connector
Heater Control Valve, 1971-85 GM, 90-Degree Connector