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  3. GM 5974466

GM 5974466 Rear Center High Mount Lamp

fits model: Century, Cutlass. make: Buick. year: 1985–1988.

5974466 Gm 85-88 Buick Century Cutlass Rear Center High Mount Stop Lamp Assy Oem

( Brand: Gm ), ( Manufacturer Part Number: 5974466 ), ( Model: CENTURY ), ( Light Color: Red ), ( Items Included: Bulbs ), ( Placement On Vehicle: Rear ), ( Important Note: Item Does Not Fit To Wagon Models ), ( Manufacturer Warranty: 30 Days ), ( Voltage: 12 V ), ( Features: Dot-certified, Oe-certified, Sae-certified ), ( Make Model: Buick Century ), ( Finish: Smooth ), ( Lighting Technology: Led ), ( Performance Part: No ), ( Mounting Style: Screws ), ( Fitment Type: Direct Replacement ), ( Genuine Oem: Yes ), ( Type: Third Brake Light Assembly ), ( Oe/oem Part Number: 5974466, 05974466 ), ( Country Of Origin: United States )

Review GM Buick Rear High Mount Stop Lamp Assy Oem fits CENTURY CUTLASS 1985–1988

The **GM 5974466 85-88 Buick Century/Cutlass Rear Center High-Mount Lamp** is a meticulously crafted, factory-replacement lighting component designed to restore the original aesthetic and functionality to the rear center high-mount stop lamp assembly on select 1985 through 1988 Buick Century and Cutlass models. This lamp features a robust, durable **amber-tinted polycarbonate lens** that ensures optimal visibility while maintaining compliance with federal lighting regulations, providing a clear, bright signal when the vehicle s brake system is engaged. The housing is constructed from high-quality **black plastic**, engineered to resist UV degradation and environmental wear, ensuring long-lasting performance even under prolonged exposure to harsh weather conditions. Inside, the lamp houses a **high-output incandescent bulb socket**, compatible with standard **12-volt automotive bulbs**, allowing for easy replacement without the need for specialized tools or modifications. The mounting bracket is precision-fabricated to align seamlessly with the vehicle s factory cutout, ensuring a secure and flush fit that eliminates gaps and enhances both safety and appearance. Whether restoring a classic Buick for show or replacing a worn-out original component, this high-mount lamp delivers a perfect blend of authenticity, reliability, and performance, making it an ideal choice for enthusiasts and mechanics alike.

### **Pros and Cons of Buying a 1985-1988 Buick Century/Cutlass Rear Center High-Mount Lamp (GM Part # 5974466)**

#### **Pros:**

1. **Reliability and Durability** High-mount lamps (HMLs) from this era are generally robust, built to last, and less prone to failure compared to modern LED or fragile plastic units. The mechanical design of older halogen HMLs is simpler and often more durable over time.

2. **Compatibility** This specific part (GM #5974466) is designed for the 1985 1988 Buick Century and Cutlass models, ensuring an exact fit without modification. It avoids the hassle of aftermarket parts that may not align perfectly.

3. **Better Visibility in Snow and Fog** High-mount lamps improve rear visibility, which is particularly useful in adverse weather conditions like snow, fog, or heavy rain. This can enhance safety for following drivers.

4. **Aesthetic Continuity** Replacing a broken or missing HML with an original or high-quality aftermarket unit maintains the vehicle s original appearance, avoiding a mismatched or "jury-rigged" look.

5. **Easier to Source Than Some Modern Parts** While not as common as they once were, this part is still available through automotive salvage yards, GM parts dealers, or reputable online suppliers. It may be cheaper than some newer aftermarket alternatives.

6. **No Complex Installation** Unlike modern LED or smart HMLs, this unit requires a straightforward wiring connection and mounting process. No additional electronics or programming is needed.

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#### **Cons:**

1. **Age-Related Wear** Even if the part itself is in good condition, the wiring harness or mounting brackets may be degraded due to age, rust, or corrosion. Inspecting these components is crucial before installation.

2. **Halogen Bulb Limitations** The unit uses a halogen bulb, which has a shorter lifespan (typically 6 10 months) compared to modern LEDs. You ll need to replace the bulb periodically, adding to long-term costs.

3. **Potential for Dimming or Flickering** Older HMLs can sometimes dim or flicker due to voltage fluctuations, especially if the vehicle s electrical system is weak. This may require a voltage regulator or bulb upgrade.

4. **Limited Aftermarket Support** While the part itself is easy to find, finding a compatible replacement bulb or housing (if the original is damaged) may be harder than for newer vehicles. Some aftermarket HMLs may not fit perfectly.

5. **Safety Concerns with Aftermarket Units** If purchasing a non-GM part, ensure it meets safety standards (e.g., FMVSS 108 for rear lamps). Cheap or poorly made units may not illuminate properly or could pose a hazard.

6. **Potential for Rust or Water Intrusion** Older vehicles are more susceptible to rust in the rear housing or wiring connections. If the mounting area is corroded, additional sealing or repairs may be needed.

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### **Conclusion:**

Buying the **GM #5974466 high-mount lamp for a 1985 1988 Buick Century/Cutlass** is a practical choice if you prioritize **reliability, exact fit, and improved rear visibility**. The part is straightforward to install and maintain, and its mechanical design makes it less likely to fail catastrophically compared to modern alternatives. However, you must account for the **halogen bulb s limited lifespan, potential electrical issues, and the need to inspect surrounding components** for rust or wear.

If the unit is **new or in excellent condition**, it represents a cost-effective solution. If it s **used or salvaged**, thoroughly check for damage, corrosion, or wiring problems before installation. For long-term convenience, consider upgrading to an **LED HML** (if compatible) later, as they offer better longevity and energy efficiency.

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### **Recommendation:** - **Buy the GM part (#5974466) if:**

- You want an **exact fit** with minimal modification.

- You re comfortable with **halogen bulbs** and their maintenance.

- The unit is **new or from a trusted salvage yard** with no visible damage.

- You plan to **inspect and clean the mounting area** for rust or corrosion.

- **Consider alternatives if:**

- You want **longer-lasting illumination** (LED HMLs, if available for your model).

- The vehicle has **electrical issues** that might cause flickering (test the unit in another vehicle first).

- You re unsure about the **condition of the wiring or housing** (a professional inspection may be needed).

**Final Verdict:** This is a **solid, no-frills solution** for restoring rear visibility on your Buick. Just ensure you address any underlying issues (rust, wiring) to maximize its lifespan. If budget allows, pairing it with a **high-quality halogen bulb** (e.g., Philips or Osram) will improve performance.

Details:

This listing is for a rear high mount stop lamp assembly pulled from 1988 Buick Century. Item was used in model's and years indicated, but as there were MANY different options, PLEASE match part number with one of those provided the listing prior to purchase ensure fitment.

part #: 5974466 price

  • $15.00

specifications lightinglam:

  • for models: Century, Cutlass
  • for makes: Buick
  • for years: 1985-1988
  • brand: Gm
  • mpn: 5974466
  • model: Century
  • light color: Red
  • items included: Bulbs
  • placement on vehicle: Rear
  • important note: Item Does Not Fit To Wagon Models
  • manufacturer warranty: 30 Days
  • voltage: 12 V
  • features: Dot-certified, Oe-certified, Sae-certified
  • make model: Buick Century
  • finish: Smooth
  • lighting technology: Led
  • performance part: No
  • mounting style: Screws
  • fitment type: Direct Replacement
  • genuine oem: Yes
  • type: Third Brake Light Assembly
  • oe/oem part number: 5974466, 05974466
  • country of origin: United States

general lightinglam:

  • Car Truck Parts Accessories > Lighting Lamps > Third Brake Light Assemblies
  • condition: Used

returns lightinglam:

  • paid by: Seller
  • time: 30 Days
  • policy: Returns Accepted

shipping lightinglam:

  • service: USPS Ground Advantage, UPS Ground, USPS Priority Mail
  • cost: $10.60
  • carrier: USPS, UPS
  • class: Standard, Expedited
  • type: Calculated
  • transit: 3-8 Days

seller lightinglam:

  • city: Mineral Point, Pennsylvania
  • # reviews: 502
  • rating: 99.8%

payments lightinglam:

  • credit card: Diners-club
  • other
  • wallet: Apple-pay

offer lightinglam:

  • started: April 28, 2026
  • quantity: 1
  • best offers: True
  • availability: In Stock
  • sold: 0
  • options: Ship-to-home
for models: century, cutlass, for makes: buick, for years: 1985-1988, light color: red, items included: bulbs, placement on vehicle: rear, important note: item does not fit to wagon models, manufacturer warranty: 30 days, voltage: 12 v, features: dot-certified, oe-certified, sae-certified, make model: buick century, finish: smooth, lighting technology: led, performance part: no, mounting style: screws, fitment type: direct replacement, genuine oem: yes, type: third brake light assembly, oe/oem part number: 5974466, 05974466, country of origin: united states,
category: auto parts > car truck parts accessories > lighting lamps > center third brake light assemblies, sku: 15731949989138721,
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