BUICK 475862 Chev Car Cooling Fan Relay Nos Gm General Car/truck
fits make: Buick, Olds, Pontiac, Gmc. year: 1980-82.
( Brand: Buick ), ( Manufacturer Part Number: 475862 ), ( Type: Relay ), ( Surface Finish: Nos ), ( Vintage Part: Yes ), ( Country Of Origin: United States )
Review BUICK General Motors 1980 82 Chev Olds Pontiac And Gmc Car/truck Cooling Fan Relay nos Gm #475862 fits 1980-82
The **GM Part Number 475862 (1980 1982 Buick, Oldsmobile, Pontiac, and GMC Cooling Fan Relay)** is a robust, high-performance electrical relay designed specifically for the cooling fan circuit in General Motors vehicles from the early 1980s. This relay serves as a critical component in the engine cooling system, ensuring the radiator fan activates under the right conditions typically when the engine temperature rises above a set threshold or when the vehicle s cooling system demands additional airflow. Crafted with precision engineering, this relay features a durable, sealed construction to protect against moisture, dust, and electrical interference, which is essential for reliable operation in both passenger cars and light-duty trucks from brands like Buick, Oldsmobile, Pontiac, and GMC. The relay operates using a normally open (NO) contact configuration, meaning the fan circuit remains open until the relay is energized by the vehicle s cooling fan control module or thermostat switch, at which point it closes the circuit to power the fan motor. This design minimizes unnecessary wear on the fan while ensuring it engages promptly when needed, preventing overheating and maintaining optimal engine performance. Compatible with a wide range of 1980 1982 GM applications, this relay is a direct-fit replacement for original equipment (OEM) units, offering the same electrical specifications and mechanical reliability as the factory part. Whether replacing a failed relay due to corrosion, wear, or electrical failure, or upgrading for enhanced durability, this component is a dependable choice for restoring or maintaining the cooling system s efficiency in classic and vintage GM vehicles. Its compact yet sturdy design ensures easy installation, fitting seamlessly into the vehicle s existing relay slot or mounting bracket, while its high-quality contacts guarantee consistent performance over time.
### Pros and Cons of Buying a General Motors (GM) Cooling Fan Relay (Part Number 475862, Fits 1980 1982 Buick, Oldsmobile, Pontiac, GMC)
#### **Pros:**1. **Compatibility** This relay is designed specifically for a range of GM vehicles from 1980 to 1982, ensuring a direct fit without modification. It eliminates the need for custom wiring or adapters, making installation straightforward.
2. **Reliability** GM relays from this era were generally built to last, provided they are in good condition. A functioning relay ensures proper operation of the cooling fan, preventing overheating in the engine.
3. **Cost-Effective** Compared to labor-intensive repairs (such as replacing a faulty cooling fan motor or thermostat), replacing a relay is a low-cost solution. It can save money in the long run by preventing more extensive engine damage.
4. **Easy Replacement** Relays are simple to replace, requiring minimal tools and time. Most mechanics or even DIYers can swap it out in under an hour, reducing downtime for the vehicle.
5. **Prevents Further Damage** A failing cooling fan relay can cause the fan to run intermittently or not at all, leading to overheating. Replacing it ensures consistent cooling system operation, protecting the engine from heat-related failures.
6. **Aftermarket Availability** This relay is widely available from GM parts suppliers, online marketplaces, and auto parts stores, making it easy to source even if you re not near a dealership.
#### **Cons:**1. **Age and Wear** Relays from this era (1980s) may be prone to internal corrosion or mechanical failure due to age. If the relay has been exposed to moisture or extreme conditions, it may not function reliably.
2. **Potential Counterfeit Parts** Some aftermarket or eBay sellers may offer replicas or low-quality replacements that don t meet GM s original specifications. This could lead to premature failure or inconsistent performance.
3. **Diagnostic Challenges** If the relay is faulty but not obviously broken, diagnosing the issue can be tricky. Symptoms like a non-functioning cooling fan might also stem from other problems (e.g., a bad thermostat, wiring issues, or a failing fan motor).
4. **Limited Longevity** Even a new relay may not last indefinitely, especially if the vehicle is driven in harsh conditions (e.g., extreme heat, dust, or vibration). Over time, it may require replacement again.
5. **Installation Risks** If not installed correctly, there s a chance of miswiring or improper grounding, which could lead to electrical shorts or further component failure. This risk is higher if the installer lacks experience with GM electrical systems.
6. **Vehicle-Specific Issues** While the relay fits multiple models, some variations in wiring or mounting may exist between Buicks, Oldsmobiles, Pontiacs, and GMCs. Double-checking the installation against the vehicle s wiring diagram is essential.
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### **Conclusion**
Replacing a cooling fan relay in a 1980 1982 GM vehicle is a practical and cost-effective solution for restoring proper engine cooling. The relay is easy to source, install, and replace, and it can prevent costly engine damage caused by overheating. However, the quality of the replacement part is critical prioritize authentic GM or high-quality aftermarket parts to avoid premature failure. Additionally, ensure the relay is installed correctly to avoid electrical issues. If the vehicle has other aging components (e.g., wiring harnesses, fan motors), addressing those simultaneously may be wise to prevent recurring problems.
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### **Recommendation**
1. **Source the Part Carefully** Purchase the relay from a reputable supplier (e.g., RockAuto, Summit Racing, or a local GM parts dealer) to avoid counterfeit or low-quality replacements. Verify the part number (475862) matches your vehicle s application.
2. **Inspect the Relay Before Installation** If possible, test the relay with a multimeter or by swapping it with a known-good relay from another system (e.g., the horn or fuel pump relay). Visual inspection for corrosion or damage is also helpful.
3. **Follow GM s Wiring Diagram** Consult your vehicle s service manual or a reliable online source (like Chilton or Haynes) to ensure correct wiring and mounting. Incorrect installation can lead to electrical problems.
4. **Check for Related Issues** While replacing the relay, inspect the cooling fan motor, thermostat, and wiring harness for signs of wear or failure. Addressing these proactively can extend the life of your repair.
5. **Test the Repair** After installation, start the engine and monitor the cooling fan s operation at idle and under load (e.g., while driving). If the fan still doesn t engage as expected, revisit the relay or other components.
6. **Consider Professional Help if Unsure** If you re uncomfortable with electrical work or diagnosing the issue, consult a mechanic familiar with GM vehicles from this era. They can confirm the relay s condition and ensure proper installation.
**Final Verdict:** Replacing the relay is a sound investment for restoring cooling system reliability in your vehicle. With the right part and careful installation, it offers a quick fix that can save you from more expensive repairs down the road. However, if the vehicle has multiple aging components, a broader inspection may be warranted.
Details:
This new-old stock NOS relay, with the manufacturer part number 475862, is made in USA. Ideal for collectors or car enthusiasts looking to restore enhance the cooling system of their classic GM vehicles.
part #: 475862 prices
- $7.50-$50.00
specifications ocoosys:
- for makes: Buick, Olds, Pontiac, Gmc
- for years: 1980-82
- brand: Buick
- mpn: 475862
- type: Relay
- surface finish: Nos
- vintage part: Yes
- country of origin: United States
payments ocoosys:
- other
- wallet: Paypal
- credit card: Mastercard
seller ocoosys:
- rating: 99.7%
- city: Blackwell, Oklahoma
- # reviews: 5807
general ocoosys:
- condition: New other see details
- Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components
offer ocoosys:
- quantity: 1
- started: March 4, 2026
- availability: In Stock
- options: Ship-to-home
- sold: 0
shipping ocoosys:
- service: USPS Ground Advantage
- transit: 5-10 Days
- class: Standard
- cost: $0.00
- carrier: USPS
- type: Calculated
returns ocoosys:
- policy: Returns Accepted
- time: 30 Days
- paid by: Buyer
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