1. Trunk Lids & Parts Exterior For Sale
  2. sku: 16482699779596751
  3. CHEVROLET TRUCK TAHOE

CHEVROLET TRUCK 640.GM8B15 Lid Motor Down

fits model: Tahoe. make: Chevrolet. year: 2015.

640.gm8b15 Chevrolet Truck Tahoe 2015 Lid Motor Pull Down 5432319

( Brand: Chevrolet Truck ), ( Part Type: Lid Motor Down ), ( Genuine Oem: Yes ), ( Ipn: 640.gm8b15 ), ( Manufacturer Warranty: 90 Day )

Review CHEVROLET TRUCK Lid Motor Pull Down fits TAHOE 2015

The **2015 Chevrolet Tahoe (GM8B15) Trunk/Lid Motor Assembly (Part # 640.GM8B15)** is a critical component of the vehicle s rear cargo area functionality, designed to ensure smooth, reliable operation of the liftgate mechanism. This motorized unit is engineered to provide effortless opening and closing of the rear hatch, enhancing convenience and accessibility for drivers and passengers alike. Built with precision and durability in mind, the lid motor is integrated into the Tahoe s rear hatch system, featuring a robust electric actuator that works in tandem with the vehicle s power liftgate mechanism. The assembly incorporates a high-quality gear reduction system to deliver consistent torque and smooth motion, minimizing wear and tear while ensuring longevity. This motor is compatible with the Tahoe s 2015 model year, adhering to General Motors GM8B15 platform specifications, which includes features like the optional power liftgate, keyless entry, and integrated tailgate sensors for added safety. The unit is designed to withstand frequent use, adverse weather conditions, and the rigors of daily driving, making it a dependable choice for both personal and commercial applications. Whether used in a standard Tahoe or a hybrid variant, this lid motor ensures seamless operation, reducing the effort required to open or close the cargo area, which is particularly beneficial for larger vehicles where manual operation would be cumbersome. Its integration with the Tahoe s advanced driver-assistance systems and user-friendly controls further emphasizes its role in modern automotive convenience. For those seeking a direct replacement or upgrade, this part is a straightforward, high-performance solution that maintains the integrity of the vehicle s original design while improving functionality.

### **Pros and Cons of Buying a 2015 Chevrolet Tahoe with a GM8B15 (6.4L V8) Liftgate Motor Failure**

#### **Pros**

1. **Reliable Engine and Powertrain** The 6.4L V8 (GM8B15) is a robust engine known for durability, especially in full-size SUVs like the Tahoe. With proper maintenance, it can last well beyond 200,000 miles.

2. **Strong Towing and Hauling Capacity** The 2015 Tahoe (with the 6.4L V8) has a towing rating of up to **8,400 lbs** (with the proper package), making it ideal for heavy-duty tasks like towing trailers or carrying large loads.

3. **Comfortable and Spacious Interior** The Tahoe offers a roomy cabin with three rows of seating, making it suitable for families or those needing extra passenger space.

4. **Good Resale Value** GM s full-size SUVs generally hold their value better than some competitors, and the Tahoe is no exception.

5. **Available Safety Features** The 2015 model comes with standard stability control, traction control, and airbags, along with optional advanced safety tech like forward collision alert and blind-spot monitoring.

6. **Proven Transmission (6L80/6L90)** The paired 6-speed automatic transmission (6L80 or 6L90) is reliable and handles the V8 s power well, provided it has been maintained.

7. **Off-Road Capability (with Options)** Some 2015 Tahoes were equipped with optional off-road packages, including skid plates, all-terrain tires, and a limited-slip differential, improving capability on rough surfaces.

8. **Lower Operating Costs Compared to Diesel** While not as fuel-efficient as a diesel V8, the 6.4L V8 still offers better MPG than many heavy-duty diesel engines, reducing long-term fuel expenses.

---

#### **Cons**

1. **Liftgate Motor Failure (Main Concern)** The most significant issue with this Tahoe is the **failed liftgate motor**. The GM8B15 engine is not directly related to this problem, but the liftgate motor is an electrical/mechanical component that can fail due to:

- **Corrosion** (common in older Tahoes exposed to salt or moisture).

- **Worn-out wiring or connectors**.

- **Electrical gremlins** (a known issue in some GM vehicles from this era).

- **Failure of the liftgate motor itself** (a common wear-and-tear issue).

**Repair Costs:**

- **Motor replacement:** $200 $400 (parts only, labor may add $300 $600).

- **Wiring/harness repair:** Could be additional $100 $300 if corroded.

- **Full liftgate assembly replacement:** $500 $800 if the motor is beyond repair.

**Workaround:** Some owners manually prop the liftgate open with a small wedge or use a remote control hack (if the motor is dead but wiring is intact).

2. **Fuel Efficiency** The 6.4L V8 is **not fuel-efficient**, with EPA-estimated ratings of around **14 16 MPG city / 19 21 MPG highway**. This can add up to significant fuel costs over time.

3. **Maintenance Requirements** A V8 engine requires **regular oil changes (every 5,000 7,500 miles)**, timing belt inspection (if applicable), and other preventative maintenance to avoid costly repairs.

4. **Potential Transmission Issues** While the 6L80/6L90 transmissions are generally reliable, some owners report **rough shifting or delayed engagement** over time, especially if fluid hasn t been changed recently.

5. **Rust Concerns** Older Tahoes (especially those from snowy regions) may have **frame or undercarriage rust**, which can weaken structural integrity. A thorough inspection is essential.

6. **Electrical System Quirks** GM vehicles from this era are known for **electrical gremlins**, including:

- **Random warning lights** (check engine, ABS, etc.).

- **Intermittent power window or seat motor failures**.

- **Infotainment system glitches** (if equipped with a navigation system).

7. **Depreciation** The Tahoe loses value quickly, and a 2015 model with a known issue (like the liftgate motor) may not hold value as well as a more reliable alternative.

8. **Resale Challenges** Buyers may be hesitant to purchase a Tahoe with a liftgate motor failure, making it harder to sell later.

---

### **Conclusion**

Buying a **2015 Chevrolet Tahoe with a 6.4L V8 and a failed liftgate motor** can be a **good deal if:**

- You **prioritize towing capacity and durability** over fuel efficiency.

- You **budget for the liftgate repair** ( $300 $800) and are willing to address any minor electrical or maintenance issues.

- You **find a well-maintained example** with no major rust or transmission problems.

- You **plan to keep the vehicle long-term** and don t mind its lower MPG.

However, if the **liftgate motor failure is a dealbreaker** or you re concerned about **long-term reliability**, this may not be the best purchase. Alternatives like a **used diesel V8 Tahoe (e.g., Duramax 6.6L)** or a **Toyota Sequoia/Highlander** (with better reliability ratings) could be worth considering.

---

### **Recommendation**

1. **If you love the Tahoe s size and towing ability and can afford the liftgate repair:** - **Get a pre-purchase inspection (PPI)** from a trusted mechanic to check:

- Liftgate motor wiring and motor health.

- Transmission fluid condition.

- Rust in critical areas (frame, subframe).

- Engine and drivetrain for leaks or wear.

- **Budget for the liftgate fix** and any other minor repairs.

- **Consider buying from a reputable dealer or private seller with full service records.**

2. **If the liftgate motor failure is a major inconvenience:**

- **Look for a Tahoe with a working liftgate** (even if slightly more expensive).

- **Explore alternatives** like a **used diesel Tahoe (if available)** or a **Toyota Sequoia** for better long-term reliability.

- **Negotiate the price down** if the seller is aware of the liftgate issue.

3. **If you re on a tight budget:**

- **Buy the Tahoe, fix the liftgate, and drive it** but be prepared for higher fuel and maintenance costs.

- **Monitor for other potential issues** (electrical, transmission) and address them promptly.

**Final Verdict:**

The **2015 Chevrolet Tahoe with a 6.4L V8 is a capable SUV for those needing heavy towing**, but the **liftgate motor failure is a significant drawback**. If you can **afford and fix the liftgate issue**, it can be a solid purchase. Otherwise, **weigh alternatives carefully** before committing.

Details:

Residential delivery is not included in the free shipping.

part #: 640.gm8b15 prices

  • $140.25-$146.25

specifications trunklipa:

  • for models: Tahoe
  • for makes: Chevrolet
  • for years: 2015
  • brand: Chevrolet Truck
  • part type: Lid Motor Down
  • genuine oem: Yes
  • ipn: 640.gm8b15
  • manufacturer warranty: 90 Day

seller trunklipa:

  • # reviews: 9478
  • rating: 98.8%
  • city: Knoxville, Tennessee

shipping trunklipa:

  • service: Standard
  • cost: $0.00
  • transit: 4-8 Days
  • class: Standard
  • type: Fixed

returns trunklipa:

  • policy: Returns Accepted
  • paid by: Buyer
  • time: 60 Days

payments trunklipa:

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

offer trunklipa:

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

general trunklipa:

  • Exterior Parts Accessories > doors, Trunk Lids Hatches > Hatches Trunk Lids
  • condition: Used
for models: tahoe, for makes: chevrolet, for years: 2015, part type: lid motor down, genuine oem: yes, manufacturer warranty: 90 day,
manufacturer: chevrolet, category: auto parts > exterior parts accessories > doors, trunk lids hatches > hatches trunk lids, sku: 16482699779596751,
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  • Used. Offer #1 priced at $140.25 + $0.00 shipping estimate = $140.25* total. FREE SHIPPING
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