GMC 807346 Rear View Mirror Passenger Right Power Door 128-12112 M1304

( Manufacturer Part Number: 807346 ), ( Part Type: Mirror Door ), ( Ipn: 128-12112 ), ( Fitment Type: Direct Replacement ), ( Surface Finish: Chrome ), ( Modified Item: No ), ( Placement On Vehicle: Right )

Review GMC Passenger Right Side View Power Door Mirror Chrome fits SIERRA 2500

The **GMC 807346 Sierra 2500 Passenger Side Power Door Mirror (M1304)** is a premium, high-performance accessory designed to enhance both the functionality and aesthetic appeal of your full-size pickup truck. Engineered with precision for the **GMC Sierra 2500 HD**, this power door mirror replaces the stock side-view mirror with a sleek, modern unit that combines cutting-edge technology with robust durability. The mirror features a **fully electric power operation**, allowing for effortless adjustment with the push of a button, eliminating the need for manual cranking and providing a seamless, driver-friendly experience. Its **M1304 designation** ensures compatibility with the latest GMC Sierra models, offering a seamless fit with minimal modification required, making it an ideal upgrade for those seeking convenience without sacrificing style.

Beyond its practical advantages, this power mirror is constructed from high-quality materials, including a **durable polycarbonate lens** that resists fogging, scratches, and UV damage, ensuring optimal visibility in all weather conditions. The **integrated LED turn signal** is clearly visible from multiple angles, improving safety and compliance with road regulations. The mirror s **contoured design** complements the aggressive yet refined lines of the Sierra 2500, offering a subtle yet noticeable upgrade that enhances the truck s overall presence. Whether parked in a lot or cruising down the highway, this mirror delivers both utility and a touch of sophistication, making it a standout feature for any GMC owner who values both performance and premium craftsmanship. With its **reliable electric motor** and **weather-resistant construction**, this part is built to withstand the demands of heavy-duty use, ensuring long-lasting performance and peace of mind.

### **Pros and Cons of Buying a GMC Sierra 2500HD (VIN 807346) with a Passenger Side Power Door Mirror (M1304)**

#### **Pros**

1. **Reliable Heavy-Duty Truck Platform**

- The GMC Sierra 2500HD is built on the Duramax diesel platform, known for durability, strong towing capacity (up to 12,000 lbs with the right setup), and long-term reliability when properly maintained.

- The 6.6L Duramax V8 diesel engine is well-regarded for its torque and fuel efficiency compared to gasoline alternatives.

2. **High Resale Value**

- Diesel trucks, especially well-maintained Duramax models, hold their value better than many gasoline-powered trucks, making this a solid long-term investment.

3. **Power Convenience Features**

- The passenger side power door mirror (M1304) adds convenience, especially in cold or wet conditions, reducing the need to manually adjust mirrors. This is a useful feature for daily drivers.

4. **Potential for Customization**

- The Sierra 2500HD has a strong aftermarket support, allowing for upgrades like exhaust systems, suspension modifications, or towing packages if needed.

5. **Diesel Fuel Efficiency (Compared to Gas Engines)**

- While not as fuel-efficient as modern gasoline hybrids or small diesels, the Duramax still offers better MPG in highway driving and lower operating costs per mile over long distances.

6. **Spacious Cab and Bed Options**

- The extended cab and crew cab configurations provide ample seating and cargo space, making it versatile for work or family use.

---

#### **Cons**

1. **Higher Upfront Cost**

- Diesel trucks, especially well-equipped models, typically have a higher purchase price than comparable gasoline trucks. This one may require a significant investment.

2. **Maintenance and Repair Expenses**

- Diesel engines, while durable, require more specialized maintenance (e.g., fuel filters, turbocharger inspections, DPF/EGR cleaning). Parts and labor can be more expensive than for gasoline engines.

- The passenger side power mirror (M1304) may have its own potential issues, such as motor failure or wiring problems, which could add unexpected repair costs.

3. **Fuel Costs**

- Diesel fuel is often more expensive than gasoline, and while the Duramax is efficient, fuel expenses can still add up, especially for heavy-duty use.

4. **Resale Depreciation Over Time**

- While Duramax trucks hold value well, they still depreciate. If you plan to keep it for many years, the initial cost may not be fully recovered upon resale.

5. **Potential for Hidden Issues**

- Transmission or drivetrain wear.

- Suspension or steering issues (common in older trucks).

- Electrical gremlins (e.g., faulty sensors, wiring harness problems).

- The power mirror (M1304) could have internal motor failures or wiring issues that may not be immediately obvious.

6. **Diesel-Specific Challenges**

- Cold weather can cause diesel engines to struggle with fuel gelling or DPF clogging if not properly maintained.

- Emissions regulations may require additional maintenance (e.g., DEF system for newer models).

7. **Limited Availability of Parts**

- While Duramax parts are widely available, some aftermarket or specialized components may take longer to source than for more common vehicles.

---

### **Conclusion**

Buying this **GMC Sierra 2500HD (VIN 807346) with a passenger side power door mirror (M1304)** can be a strong choice if you prioritize **durability, towing capacity, and long-term reliability**. The power mirror adds convenience, which is a nice touch for daily use. However, the **higher upfront and maintenance costs**, along with the potential for hidden mechanical or electrical issues, must be carefully considered.

If you are prepared for the **higher cost of ownership** and can afford regular maintenance (including diesel-specific upkeep), this truck could be an excellent workhorse or family vehicle. **A pre-purchase inspection by a trusted mechanic is strongly recommended** to avoid costly surprises.

---

### **Recommendation**

- You need a **heavy-duty truck for towing, hauling, or off-roading**.

- You are willing to **budget for diesel maintenance** and have access to a mechanic familiar with Duramax engines.

- The **power mirror (M1304) is in good working condition** (test it thoroughly before buying).

- You plan to **keep the truck for at least 5 7 years**, allowing you to recoup some of the investment.

- You are **uncomfortable with higher fuel and maintenance costs**.

- The truck has **visible signs of neglect** (e.g., fluid leaks, uneven tire wear, rough transmission shifts).

- The **power mirror (M1304) has known issues** (e.g., flickering, unresponsiveness) that could indicate wiring or motor failure.

- You can find a **similar model in better condition** at a lower price after inspection.

**Final Verdict:** This truck has strong potential as a **reliable work or family vehicle**, but only if you are prepared for the associated costs and perform due diligence. **Get a professional inspection first** to ensure there are no major hidden problems. If the inspection clears the truck, it could be a **wise long-term purchase**.

Details:

SIERRA 3500 PICKUP 20-22 w/extended width , w/automatic dimming, power extending opt DZC, w/surround view UVS, R. Shipping is via USPS or UPS. Compatible with: SILVERADO 3500 PICKUP 20-22 w/extended width , w/automatic dimming, power extending opt DZC, w/surround view UVS, R. Most electronic parts are not plug and play.

SIERRA 2500 PICKUP 20-22 w/extended width , w/automatic dimming, power extending opt DZC, w/surround view UVS, R. This Gmc SIERRA 2500 Door Mirror is in overall good condition. Please also use the pictures to ensure a proper fit.

part #: 807346 prices

• $450.00-$712.60

specifications mirroexter:

• for models: 2500, Sierra
• for makes: Gmc
• mpn: 807346
• part type: Mirror Door
• ipn: 128-12112
• fitment type: Direct Replacement
• surface finish: Chrome
• modified item: No
• placement on vehicle: Right

seller mirroexter:

• # reviews: 86161
• rating: 99.4%
• city: Las Vegas, Nevada

shipping mirroexter:

• cost: $0.00
• service: Standard, Expedited
• transit: 3-6 Days
• type: Fixed
• class: Standard, Expedited

payments mirroexter:

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

returns mirroexter:

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

offer mirroexter:

• started: May 3, 2026
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• sold: 0

general mirroexter:

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

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