This genuine AC Delco 131-3 thermostat (Part No. 3041390) is a New Old Stock (NOS) OEM replacement component designed to help maintain proper engine operating temperature. Manufactured to original equipment standards, it provides reliable coolant flow regulation for consistent engine performance.
Produced for the 1991 model year, this thermostat remains brand new in its original box, making it an excellent choice for vehicle restoration projects, preventive maintenance, or replacing a worn thermostat with a genuine AC Delco part.
Built for durability and dependable operation, this OEM thermostat helps improve engine efficiency, supports proper warm-up times, and assists in maintaining optimal cooling system performance.
Key Features
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NOS Condition: New Old Stock part preserved in original packaging.
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New in Box: Unused part in original packaging for authenticity and protection.
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Reliable Temperature Control: Regulates coolant flow for proper engine operation.
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Ideal for Restoration Projects: Excellent choice for classic vehicle maintenance and repairs.
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OEM Fit and Function: Designed to match original equipment performance standards.
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Supports Cooling System Efficiency: Helps maintain correct engine operating temperature.
- Genuine AC Delco Part: Original OEM component manufactured to factory specifications.
Specifications
- Brand: AC Delco
- Part Number: 131-3
- OEM Number: 3041390
- Product Type: Engine Thermostat
- Condition: NOS (New Old Stock), New in Box



