GMC 128-13107 Rear View Mirror Driver Left Power Door C7X9H

( Part Type: Mirror Driver Door ), ( Ipn: 128-13107 ), ( Fitment Type: Direct Replacement ), ( Surface Finish: Painted ), ( Modified Item: No ), ( Color: Black ), ( Placement On Vehicle: Left )

Review GMC Driver Left Side View Power Door Mirror Black fits TERRAIN 2018–2021

The **GMC 128-13107 2018 2021 Terrain Driver Left View Power Door Mirror (C7X9H)** is a premium, high-performance exterior accessory designed to elevate both the functionality and aesthetic appeal of your GMC Terrain SUV. Engineered with precision and built to GMC s rigorous standards, this power door mirror replaces the stock unit with a sleek, modern design that seamlessly integrates with the vehicle s contemporary styling. The mirror features a **smart, compact housing** with a **matte black finish**, providing a subtle yet sophisticated contrast against the vehicle s bodywork while maintaining a clean, uncluttered look. At its core, this power door mirror is equipped with **reliable electric operation**, allowing for effortless adjustment of the mirror s position with the push of a button, ensuring optimal visibility whether you re navigating tight parking spaces, backing out of driveways, or cruising down winding roads. The **C7X9H designation** indicates a high-quality, OEM-level replacement part, ensuring a perfect fit with no gaps or misalignments, which is critical for both safety and curb appeal.

Beyond its practical benefits, this mirror is engineered with **durability in mind**, featuring a **reinforced metal housing** and **weather-resistant seals** to protect against the elements, including rain, snow, and UV exposure. The **clear, tinted glass** provides a sharp, unobstructed view while reducing glare, enhancing nighttime and low-light visibility without compromising clarity. For added convenience, the mirror is compatible with GMC s **optional heated element** (if equipped), preventing ice buildup in cold climates and ensuring unobstructed vision year-round. The **smooth, quiet operation** of the motorized mechanism eliminates the need for manual adjustments, making it a seamless upgrade for drivers who value both comfort and efficiency. Whether you re upgrading for improved functionality, restoring your Terrain s original appearance after an accident, or simply enhancing its premium feel, this **2018 2021 GMC Terrain driver-side power door mirror** delivers a perfect blend of performance, reliability, and style.

### **Pros and Cons of Buying a 2018-2021 GMC Terrain (Driver Left View Power Door Mirror, Part # C7X9H)**

1. **Reliability and Build Quality** The GMC Terrain, based on the Chevrolet Equinox platform, is known for solid construction and fewer major reliability issues compared to some competitors. The 2.4L or 2.5L turbocharged engines (depending on model year) are generally durable if maintained properly.

2. **Comfortable Ride and Interior Space** The Terrain offers a smooth ride, especially on highways, and provides ample cargo space (up to 77.5 cubic feet with seats folded). The interior is well-padded, with decent sound insulation, making it a comfortable choice for daily driving.

- Apple CarPlay/Android Auto

- Bluetooth connectivity

- Power-adjustable driver s seat

- Heated front seats (on higher trims)

- Backup camera (standard on most models)

- LED lighting (interior and exterior)

4. **Fuel Efficiency** The 2.4L engine (non-turbo) offers decent MPG (around 23 city / 30 highway), while the turbocharged 2.5L provides better performance with slightly lower fuel economy ( 20 city / 27 highway). This makes it a practical choice for commuters.

5. **Safety Ratings** The Terrain has received good safety ratings from the NHTSA and IIHS, with standard stability control, traction control, and available safety packages (like Forward Collision Alert and Automatic Emergency Braking).

6. **Resale Value** Compared to some SUVs in its class, the Terrain holds its value reasonably well, especially if well-maintained.

7. **Driver Left View Power Door Mirror (C7X9H)** This specific part is a high-quality power mirror with a driver-side view camera, which enhances visibility and convenience. It s a common replacement part, meaning it s easy to find and install.

---

1. **Turbocharged Engine Issues (2018-2020 Models)** Some owners of the turbocharged 2.5L engine (found in SLT and higher trims) have reported problems with:

- Turbocharger failures (leading to rough idling or loss of power)

- Oil consumption (some engines burn oil excessively)

- Transmission hesitation or rough shifts (especially in early model years)

- Check Engine Lights (CEL) due to sensor or emissions issues

*Note: The 2021 model year saw some improvements, but turbo models still require vigilant maintenance.*

2. **Infotainment System Glitches** The GMC Uconnect system (especially in earlier years) has been criticized for lag, slow response times, and occasional software freezes. Updates have helped, but it s not as smooth as some competitors.

3. **Rear Seat Comfort** While the front seats are comfortable, the rear seats can feel tight for taller passengers, and legroom is limited compared to larger SUVs.

4. **Transmission Concerns (Early Models)** Some 2018-2019 models with the 6-speed automatic transmission have reported rough shifting or delayed engagement, though this seems to improve in later years.

5. **Resale Depreciation** Like many SUVs, the Terrain depreciates quickly, so if you plan to sell it in a few years, you may not recover as much as you invested.

6. **Maintenance Costs** While not excessively expensive, parts like the turbocharger, transmission, and suspension components can be costly if they fail. Regular oil changes (especially with synthetic oil) are crucial for turbo models.

7. **Limited Off-Road Capability** The Terrain is not a true off-roader; it has basic AWD and some ground clearance, but it lacks the ruggedness of vehicles like the Jeep Wrangler or Ford Ranger.

---

The **2018-2021 GMC Terrain** is a solid choice for buyers looking for a **reliable, comfortable, and practical SUV** for daily driving, commuting, or light adventure. Its **standard features, decent fuel economy, and good safety ratings** make it attractive, especially if you prioritize comfort and space over extreme off-road performance.

However, **potential turbocharged engine issues (oil consumption, turbo failures), infotainment quirks, and transmission concerns in early models** mean that **buyers should thoroughly inspect the vehicle s service history** before purchasing. If you re considering a **turbocharged model (2018-2020)**, ensure it has been well-maintained with regular oil changes and turbo inspections.

For those who prefer **non-turbo models**, the 2.4L engine is more reliable and requires less maintenance. If you re buying used, **prioritize models from 2021 onward**, as they incorporate some refinements.

---

- You need a **comfortable, fuel-efficient SUV** for daily use.

- You re okay with **minor infotainment quirks** and prefer a **practical, spacious interior**.

- You **avoid turbocharged models** or ensure the turbo model has **proven maintenance records**.

- You re getting a **well-documented used example** (preferably with a **CPO or certified pre-owned** designation if available).

- You **prioritize off-road capability** over on-road comfort.

- You **cannot afford potential turbocharger or transmission repairs**.

- You **hate outdated infotainment systems** and want cutting-edge tech.

- You re buying a **high-mileage turbo model without full service records**.

**Final Verdict:** The GMC Terrain is a **good mid-range SUV** for the right buyer one who values **reliability, space, and practicality** over high-performance or luxury features. **Test drive thoroughly, check maintenance history, and consider a non-turbo model if possible** to minimize risks. If you find a **2021 model with a clean history**, it s one of the safer options in this range.

Details:

Shipping is via USPS or UPS. Please also use the pictures to ensure a proper fit. Most electronic parts are not plug and play. Compatible with: TERRAIN 18-21 power, body color, w/blind spot alert, L.

This 2018 2019 2020 2021 Gmc TERRAIN Door Mirror is in overall good condition.

part #: 128-13107 prices

• $69.99-$151.90

specifications mirroexter:

• for models: Terrain
• for makes: Gmc
• for years: 2018-2021
• part type: Mirror Driver Door
• ipn: 128-13107
• fitment type: Direct Replacement
• surface finish: Painted
• modified item: No
• color: Black
• placement on vehicle: Left

offer mirroexter:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1
• started: March 8, 2026

seller mirroexter:

• # reviews: 78937
• rating: 99.2%
• city: Las Vegas, Nevada

general mirroexter:

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

shipping mirroexter:

• type: Fixed
• cost: $0.00
• service: Standard, Expedited
• class: Standard, Expedited
• transit: 4-6 Days

payments mirroexter:

• other
• wallet: Google-pay
• credit card: Mastercard

returns mirroexter:

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

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