CADILLAC 168.GM6W78 Rear Marker Light Lamp Set

( Part Type: Light Lamp ), ( Conditions Options: Rear Set ), ( Genuine Oem: Yes ), ( Ipn: 168.gm6w78 ), ( Placement On Vehicle: Left, Rear, Right )

Review CADILLAC Rear Side Marker Light Lamp Set Pair fits ELDORADO 1978

The **1978 Cadillac Eldorado Rear Marker Light Lamp Set (Part #168.GM6W78)** is a meticulously crafted, high-performance lighting component designed exclusively for the iconic 1978 Cadillac Eldorado, a classic luxury sedan renowned for its timeless elegance and powerful V8 engine. This lamp set features a robust, durable construction, ensuring long-lasting reliability and optimal visibility on the road. The rear marker lights are engineered to meet original equipment manufacturer (OEM) specifications, guaranteeing a seamless fit and a polished aesthetic that complements the Eldorado s refined silhouette. Crafted from premium materials, including high-quality glass lenses and corrosion-resistant metal housings, these lamps are built to withstand the test of time, even under harsh driving conditions. The design incorporates a classic, streamlined appearance that aligns perfectly with the Eldorado s luxurious heritage, while the bright, clear illumination ensures compliance with modern road safety standards. Whether restoring an original Eldorado or maintaining a meticulously preserved classic, this lamp set provides both functionality and authenticity, allowing enthusiasts to preserve the vehicle s heritage with precision and care. Ideal for collectors, restorers, and daily drivers who appreciate the finer details of automotive craftsmanship, this part is a must-have for anyone seeking to uphold the legendary standards of the 1978 Cadillac Eldorado.

### Pros and Cons of Buying a 1978 Cadillac Eldorado Rear Marker Light Lamp Set (GM Part # 168.GM6W78)

1. **Authenticity and Fit** This is an original or OEM-style replacement part designed specifically for the 1978 Cadillac Eldorado. It ensures an exact fit, maintaining the vehicle s original appearance and functionality without the need for modifications.

2. **Reliability** Cadillac vehicles from the late 1970s were built with durable components, and using genuine or high-quality aftermarket parts like this lamp set helps preserve the reliability of the rear lighting system.

3. **Aesthetic Value** The Eldorado is a classic luxury car, and maintaining its original lighting fixtures enhances its vintage appeal. This part helps keep the vehicle looking like it did when new.

4. **Functionality** Properly functioning rear marker lights are essential for safety and compliance with traffic laws. Replacing worn or broken lights ensures visibility and avoids potential fines or accidents.

5. **Ease of Installation** As an OEM part, it should be straightforward to install, requiring minimal tools and time. Many owners report that these parts fit without the need for adjustments or additional hardware.

6. **Availability of Replacement Parts** While older, this part is still relatively easy to find, especially from specialty auto parts suppliers or classic car dealers. It avoids the hassle of sourcing rare or custom-made replacements.

7. **Compatibility with Other Systems** Since it s designed for the Eldorado, it should integrate well with the vehicle s wiring and mounting systems, reducing the risk of compatibility issues.

---

1. **Age and Wear** The part itself may show signs of age, such as discoloration or minor wear, even if it s new. This is less of an issue with the lamp set itself but more about the condition of the sockets or wiring it connects to in the vehicle.

2. **Potential for Bulb Failure** The lamp set includes bulbs, which may burn out relatively quickly, especially if the vehicle is driven frequently. Bulbs in older cars can also be sensitive to voltage fluctuations.

3. **Cost** While not excessively expensive, this is a specialized part, and the price may be higher than generic aftermarket alternatives. However, the quality and fit justify the cost for many classic car owners.

4. **Limited Longevity** Like all lighting components, these lamps will eventually need replacement. The lifespan depends on usage, environmental factors (e.g., exposure to moisture or heat), and the quality of the bulbs.

5. **Wiring Concerns** If the vehicle s wiring harness or sockets are corroded or damaged, the lamp set may not function properly even if the part itself is fine. This could require additional repairs beyond just replacing the lamps.

6. **Availability of Bulbs** While the lamp set itself is easy to find, the specific bulbs (e.g., 12V incandescent markers) may be harder to source in the future, especially as incandescent bulbs become less common. LED or halogen alternatives may require additional modifications.

7. **Potential for Counterfeit Parts** If purchasing from an unknown seller, there s a risk of receiving a counterfeit or low-quality replica. Always buy from reputable suppliers to avoid this issue.

---

Buying the **1978 Cadillac Eldorado rear marker light lamp set (GM Part # 168.GM6W78)** is a practical choice for owners who prioritize authenticity, reliability, and ease of installation. The part is well-suited for maintaining the vehicle s original appearance and ensuring proper functionality. However, it s important to consider the potential drawbacks, such as bulb longevity, wiring compatibility, and the need for periodic replacements. The cost is reasonable for an OEM-style part, and the benefits in terms of fit and performance outweigh the minor drawbacks for most classic car enthusiasts.

---

If you own a 1978 Cadillac Eldorado and are experiencing issues with your rear marker lights, this lamp set is an excellent choice. Here s how to proceed:

1. **Verify Compatibility** Double-check that this part number matches your vehicle s exact model and year. Some Eldorado variants (e.g., Brougham or Seville) may have slight differences.

2. **Purchase from a Trusted Source** Buy from a reputable auto parts dealer, classic car specialty store, or a well-reviewed online retailer to ensure you re getting a genuine or high-quality part.

3. **Inspect the Vehicle s Wiring** Before installation, check the condition of the wiring harness and sockets. Clean any corrosion or damage to ensure the new lamps work correctly.

4. **Consider Bulb Alternatives** If you re concerned about bulb longevity, research LED or halogen alternatives that are compatible with your Eldorado. While these may require additional wiring adjustments, they can offer longer lifespan and better energy efficiency.

5. **Install Properly** Follow the manufacturer s instructions or consult a classic car mechanic if you re unsure about the installation process. Proper installation ensures safety and longevity.

6. **Maintain Regularly** Periodically inspect the rear lights and replace bulbs as needed. Keep the lenses clean to ensure maximum visibility.

For most classic car owners, the **168.GM6W78 lamp set is a sound investment** that balances authenticity, functionality, and ease of use. It s a straightforward upgrade that enhances both the practicality and the aesthetic appeal of your Eldorado.

Details:

No expedited shipping is available.

specifications sidemarkeligh:

• for models: Eldorado
• for makes: Cadillac
• for years: 1978
• part type: Light Lamp
• conditions options: Rear Set
• genuine oem: Yes
• ipn: 168.gm6w78
• placement on vehicle: Left, Rear, Right

offer sidemarkeligh:

• quantity: 1
• best offers: True
• sold: 0
• options: Ship-to-home
• availability: In Stock
• started: April 28, 2026

general sidemarkeligh:

• Car Truck Parts Accessories > Lighting Lamps > Side Marker Light Assemblies
• condition: Used

seller sidemarkeligh:

• city: Richland, Mississippi
• rating: 99.9%
• # reviews: 62581

shipping sidemarkeligh:

• type: Calculated
• class: Standard
• cost: $27.44
• carrier: UPS
• transit: 2-6 Days
• service: UPS Ground

returns sidemarkeligh:

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

payments sidemarkeligh:

• other
• credit card: Visa
• wallet: Apple-pay

Cadillac Is Similar To:

• 5961233 5961234 General Motors Cadillac Nos Chrome Cornering Lamp Bezel Set (38.4% similar) Both of these bezels are in as new condition. This listing is for 1 pair of new old stock nos genuine cadillac die cast chrome cornering lamp bezels. Shipping within the USA is by USPS priority mail. These bezels are new in the gm Delco guide boxes and cadillac part LHS Rh. These are the die cast ...(March 26th, 2019)
• 910302 General Motors Cadillac Nos Cornering Lamp Assembly Rh (36.4% similar) This lamp fits the following cadillac years and model's: 1964 cadillac all model's series 75 sedans. This lamp comes with the body, wiring harness and plug, clear cornering lenses, chrome die cast bezel bulb. This is the complete cornering lamp assembly. This lamp is new in the gm Delco guide box ...(February 27th, 2019)
• Signals Turn Side 1965 Fender Lights Cadillac 021514 Deville (23.1% similar) Chrome has some pits and scratches. These are the side marker lights from a 1965 cadillac devilled lenses are solid. Wiring will need repaired...(April 4th, 2015)
• 05974641 Gm Nos Side Chevy Buick Olds Pontiac Cadillac (12.9% similar) You are buying on a gm nos side marker-reflector believed to fit some or many: 1970 SCHEVY, Buick, old's, Pontiac, cadillac, GMC. Its nos, in the original packaging. I do not know all of the exact applications. Sales and shipping within the USA only...(March 20th, 2019)
• 1494984 Vintage 1960s Cadillac Eldorado Side Marker Light Emblem Lens Logo (54.2% similar) Will need some light cleaning polishing to bring to life. Condition is fair. No chips or cracks. Exact year unknown believed to be from the late 1960 'S. Vintage cadillac side marker light. More pics upon request. Wiring untested...(January 21st, 2016)
• 1494993 General Motors Cadillac Eldorado Front Left Side Marker Cornerning Light (49.3% similar) Light pitting and surface wear overall. The '70 eldorado was driven for two years before being totaled in a collision. Original gm part, acquired from the estate of owner cadillac eldorado front left side marker cornering light chrome bezel. Happy to answer questions...(January 31st, 2019)
• 1494994 1970 Cadillac Eldorado Passenger Side Marker Cornering Light Bezel Trim Molding (53.5% similar) There is a slight amount of pitting in the wreath and emblem area, but it is hardly noticeable. 70 eldorado right front marker light bezel in good condition...(December 4th, 2015)
• 16503217 Cadillac Seville Lh Side Marker Lamp In Rear Bumper (47.7% similar) Very nice condition with glossy lens and solid mounting points. LHS rear side marker lamp for cadillac Seville. There is a blemish in the upper Rh corner as shown photos thx...(January 19th, 2019)
• 165163041 1993-1996 Cadillac Fleetwood Turn Signal Right Marker Light Lens 16516304 (41.8% similar) Low rider, classic, low rider, slabs, dunk, dubs, hatred...(November 8th, 2015)
• Cadillac 16522818 Rh Signal Lens Light Deville Parking Turn 97-99 Rh (46.4% similar) No cracks or nicks. All tabs are intact. Passenger side Rh. This lens is in good condition...(March 30th, 2015)
• 5966540 1975-1976 Cadillac Eldorado Right Front Passenger Side Marker Park Light (52% similar) I am parting out a 1975 cadillac eldorado and here is the front right side park marker light assembly. It may fit other years and model's as well the amber lens may be a little faded but otherwise it's in excellent condition with no damage...(May 23rd, 2016)