CHEVROLET TRUCK TCHEV20 West Coast Mirror Left Right 128.GM8678

( Brand: Chevrolet Truck ), ( Manufacturer Part Number: TCHEV20 ), ( Part Type: Mirror ), ( Conditions Options: Rh/lh Wc Mirror Pair, Rh Glass Brkn ), ( Genuine Oem: Yes ), ( Ipn: 128.gm8678 ), ( Make: Chevrolet ), ( Descriptionpartcondition: Glass Broken On Rh Mirror, Slight Bend In One Bracket )

Review CHEVROLET TRUCK Gmc West Coast Mirror Pair Left Right White fits SUBURBAN 1978

The **Chevrolet/GMC 128 GM8678 West Coast Mirror** is a premium, high-performance aftermarket replacement for the factory side mirrors on the **Chevrolet Tahoe, Suburban, Yukon, and GMC Yukon/Sierra 1500/2500HD/3500HD** models, designed specifically for the **West Coast aesthetic** where sleek, aerodynamic lines and a bold, modern look are paramount. Crafted from **high-grade, corrosion-resistant aluminum** and finished with a **durable, scratch-resistant powder coat** in a matte black or polished chrome option, these mirrors are engineered to seamlessly integrate with the vehicle s contours while enhancing its visual appeal. The **128 wide-angle design** ensures an unobstructed, expansive rearward view, reducing blind spots and improving safety during lane changes, parking, and highway maneuvers. Each mirror features a **reinforced, one-piece construction** with precision-machined brackets and **heavy-duty mounting hardware**, ensuring a secure and vibration-free installation that withstands the rigors of daily driving, off-roading, or towing heavy loads. The **sleek, aerodynamic shape** eliminates the bulky, boxy appearance of stock mirrors, contributing to a more aggressive, performance-oriented stance ideal for those who demand both function and form. Additionally, the **low-profile design** reduces wind noise and drag, making these mirrors a subtle yet impactful upgrade for enthusiasts who prioritize both aesthetics and efficiency. Whether paired with a lifted suspension, aftermarket wheels, or a custom paint job, the **GM8678 West Coast Mirrors** deliver a refined, high-end finish that elevates the overall look of your full-size Chevrolet or GMC truck, setting it apart on the road while maintaining uncompromising durability and performance.

### Pros and Cons of Buying a 2023 Chevrolet Suburban (GM8678) / GMC Yukon Denali (West Coast Mirror Left/Right)

1. **Spacious and Versatile Interior**

The Chevrolet Suburban and GMC Yukon Denali are among the largest SUVs on the market, offering three rows of seating with ample legroom and cargo space. The West Coast mirror configuration (left and right) provides better visibility for drivers in urban and suburban environments, reducing blind spots.

2. **Strong Engine Options**

The 2023 models come with a **6.2L V8 engine** (producing 455 hp and 460 lb-ft of torque) or a **3.0L Duramax turbo-diesel** (277 hp and 460 lb-ft). The V8 provides strong towing (up to **9,600 lbs**) and hauling capacity, while the diesel offers excellent fuel efficiency for highway driving ( 20 MPG combined).

3. **Advanced Safety Features**

- Forward Collision Alert with Automatic Emergency Braking

- Blind Spot Monitoring with Rear Cross-Traffic Alert

- Lane Keep Assist with Lane Departure Warning

- Traffic Sign Recognition

- Adaptive Cruise Control with Low-Speed Follow

- 360-degree Camera System (available on higher trims)

4. **Luxury and Comfort**

- Premium leather-appointed seats with ventilated front buckets

- Heated, ventilated, and massaging rear seats

- Wood and aluminum trim accents

- Bose 16-speaker premium audio system

- Ambient lighting and a 12.3-inch touchscreen infotainment system

5. **Reliability and Resale Value**

GM s full-size SUVs have a reputation for durability, especially with proper maintenance. The V8 engine is known for longevity, and the diesel option offers strong fuel economy for long-distance travel. These vehicles also hold their value well compared to competitors like Ford Expedition or Toyota Sequoia.

6. **Off-Road and Towing Capabilities**

The **Trailering Package** (available) includes a **towing hitch, trailer brake controller, and enhanced cooling** for towing up to **9,600 lbs**. The **Off-Road Package** (optional) includes skid plates, all-terrain tires, and a limited-slip differential for better off-road performance.

7. **Customization and Tech Features**

- **Wireless Apple CarPlay and Android Auto** (available)

- **Heads-Up Display (HUD)** for critical driving info

- **Available 12.3-inch touchscreen with navigation**

- **Remote start and keyless entry**

---

1. **High Cost**

The 2023 Suburban/Denali starts around **$60,000 $70,000** (before options), making it one of the most expensive SUVs in its class. The diesel version is slightly more expensive due to fuel system components.

2. **Poor Fuel Economy**

- **V8 Gas:** 15 MPG city / 18 MPG highway

- **Diesel:** 20 MPG city / 26 MPG highway

This is significantly worse than smaller SUVs or even some trucks, making long-distance fuel costs higher.

3. **Size and Maneuverability Challenges**

The Suburban/Yukon is **extremely large**, making parking, city driving, and tight turns difficult. The turning radius is wide, and visibility can be obstructed in some situations despite the West Coast mirrors.

4. **Maintenance and Repair Costs**

While GM s V8 engines are durable, they require **regular oil changes (every 5,000 miles)** and may need **timing chain replacements** later in life. The diesel engine has fewer moving parts but can be expensive to repair if issues arise. GM dealership labor rates are typically higher than independent shops.

5. **Resale Depreciation**

While these vehicles hold value better than some competitors, luxury SUVs still depreciate significantly over time. If you plan to sell after a few years, you may not recoup as much as you paid.

6. **Weight and Handling**

The Suburban/Yukon is **heavy** (over **7,000 lbs fully loaded**), which can make it feel sluggish in acceleration and braking compared to lighter competitors like the Toyota Sequoia or Ford Expedition.

7. **Diesel Engine Limitations**

- **Higher upfront cost** compared to the gas V8.

- **Diesel fuel availability** can be an issue in some regions.

- **Cold-weather performance** may require additional fuel additives in very cold climates.

---

The **2023 Chevrolet Suburban (GM8678) / GMC Yukon Denali** is an excellent choice if you prioritize **space, towing capacity, luxury, and safety** over fuel efficiency and maneuverability. The West Coast mirror configuration improves visibility, making it a better fit for urban and suburban driving compared to standard mirrors. The **V8 engine** is powerful and reliable for heavy-duty tasks, while the **diesel option** is ideal for long-distance highway driving.

However, the **high purchase price, poor fuel economy, and size-related challenges** make it less suitable for **budget-conscious buyers, city dwellers, or those who prioritize efficiency**. If you need a **large, capable SUV for family use, towing, or off-roading**, this is a strong contender. But if you prefer **better fuel economy, easier handling, or a more affordable option**, consider alternatives like the **Toyota Sequoia, Ford Expedition, or even a smaller luxury SUV like the Lexus GX**.

---

You need **maximum space** (three rows, high cargo capacity).

You **tow heavy loads** (up to 9,600 lbs) or require off-road capability.

You prefer **luxury features** (Denali trim) and advanced safety tech.

You **drive mostly on highways** and can tolerate lower fuel economy.

You **value reliability and resale value** over long-term fuel savings.

You **prioritize fuel efficiency** and drive mostly in the city.

You **struggle with large vehicles** in tight parking spaces.

You **cannot afford high maintenance or repair costs**.

You **prefer a lighter, more nimble SUV** for daily driving.

- **Toyota Sequoia** (better reliability, hybrid option, but less power).

- **Ford Expedition** (strong V8, more tech features, but similar size).

- **Lexus GX** (luxury, hybrid option, but lower towing capacity).

- **Ram 3500** (if you need extreme towing but prefer a truck).

If you **must have this vehicle**, consider **buying certified pre-owned (CPO)** to save money while still getting a well-maintained example. Always **test drive** to ensure the size and features meet your needs.

Details:

R00421429 128.GM8678 ZK8036. GLASS BROKEN ON RH MIRROR, SLIGHT BEND IN ONE BRACKET: Please see photos for a better understanding of the current condition. Find us on Facebook. Miles means are unknown.

specifications mirroexter:

• for models: Suburban
• for makes: Gmc, Chevrolet
• for years: 1978
• brand: Chevrolet Truck
• mpn: Tchev20
• part type: Mirror
• conditions options: Rh/lh Wc Mirror Pair, Rh Glass Brkn
• genuine oem: Yes
• ipn: 128.gm8678
• make: Chevrolet
• descriptionpartcondition: Glass Broken On Rh Mirror, Slight Bend In One Bracket

payments mirroexter:

• wallet: Paypal
• other
• credit card: Visa

shipping mirroexter:

• carrier: UPS
• cost: $49.95
• class: Standard
• type: Fixed
• transit: 3-8 Days
• service: UPS Ground

general mirroexter:

• condition: Used
• Exterior Parts Accessories > Side View Mirrors > Mirror Assemblies

returns mirroexter:

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

seller mirroexter:

• rating: 99.8%
• # reviews: 11308
• city: Vancouver, Washington

offer mirroexter:

• started: April 20, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 1

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