CHEVROLET TRUCK 640.GM8B12 Lid Motor Down

( Brand: Chevrolet Truck ), ( Part Type: Lid Motor Down ), ( Conditions Options: Ltz ), ( Genuine Oem: Yes ), ( Ipn: 640.gm8b12 ), ( Manufacturer Warranty: 90 Day ), ( Partout Id: A-122307939 )

Review CHEVROLET TRUCK Lid Motor Pull Down fits TAHOE 2012

The **2012 Chevrolet Tahoe (GM8B12) Trunk/Lid Motor Assembly (Part Number: 640.GM8B12)** is a critical component of the vehicle s rear cargo area functionality, designed to ensure smooth and reliable operation of the liftgate mechanism. This motorized actuator is engineered to provide effortless opening and closing of the Tahoe s rear hatch, enhancing convenience for drivers and passengers alike. Built with precision and durability in mind, the lid motor operates seamlessly with the vehicle s integrated electrical system, utilizing a robust motor and a high-quality gear reduction mechanism to deliver consistent performance even under varying loads. The assembly is constructed from high-grade materials, including reinforced plastic housing and corrosion-resistant components, ensuring longevity and resistance to environmental factors such as moisture, dust, and temperature fluctuations. This motor is compatible with the Tahoe s power liftgate system, which is standard on many trims, including the LT, LS, and higher-tier models, offering a seamless integration with the vehicle s body control module (BCM) for precise control and safety features. Whether used for routine maintenance or as a direct replacement for a worn-out or malfunctioning unit, this lid motor is designed to restore the Tahoe s functionality with minimal effort, ensuring that the liftgate operates smoothly and reliably for years to come. Its compact yet sturdy design allows for easy installation, making it an ideal choice for both professional mechanics and DIY enthusiasts seeking to maintain their vehicle s optimal performance.

### **Pros and Cons of Buying a 2012 Chevrolet Tahoe with a GM8B12 (6.0L V8) and Lowered Suspension (LID Motor Down)**

#### **Pros**

1. **Reliable Engine and Power**

The GM8B12 (6.0L V8) is a well-known, durable engine known for its strength and longevity, especially when properly maintained. It produces around 360 400 horsepower, providing strong towing and hauling capabilities, which is ideal for a full-size SUV like the Tahoe.

2. **Proven Durability**

The 6.0L V8 has a reputation for lasting well over 200,000 miles with basic maintenance (oil changes, timing belt/chain service, and valve adjustments). Many examples from this era remain on the road today with minimal issues if cared for.

3. **Strong Resale Value**

The Tahoe is a popular vehicle, and the 6.0L V8 model holds its value better than some of its competitors. This makes it a safer long-term investment compared to less common engines.

4. **Good Towing and Hauling Capacity**

The Tahoe s frame and drivetrain are designed for heavy-duty use, making it suitable for towing trailers, boats, or carrying large loads. The 6.0L V8 supports this capability well.

5. **Lowered Suspension (LID Motor Down) Benefits**

- **Improved Handling and Ride Quality:** A lowered suspension can make the vehicle feel more responsive and stable, especially on highways or in tight turns.

- **Better Ground Clearance for Off-Roading (if equipped):** Some lowered Tahoes are built with off-road modifications that improve approach/departure angles and articulation.

- **Aesthetic Appeal:** A lowered stance can give the Tahoe a more aggressive or sporty look, which some buyers prefer.

6. **Availability of Parts and Modifications**

The Tahoe platform is widely supported by aftermarket parts, from suspension upgrades to performance tuning. This makes it easier to customize or repair if needed.

7. **Comfortable Interior**

The Tahoe s interior is spacious, offering comfortable seating for up to eight passengers and ample cargo room. The 2012 model includes modern features like backup cameras and available navigation systems.

---

#### **Cons**

1. **Potential Suspension Issues from Lowering**

- **Wear and Tear:** Lowering a vehicle can accelerate wear on suspension components (shocks, springs, bushings, and control arms). If the suspension was not properly modified, it may lead to premature failure or handling issues.

- **Ride Comfort Sacrificed:** A lowered suspension can make the ride harsher, especially on rough roads or speed bumps. This may be uncomfortable for passengers or damage-sensitive cargo.

- **Alignment Problems:** Lowering can throw off wheel alignment, leading to uneven tire wear or handling issues if not corrected.

2. **Maintenance Requirements**

- **Timing Chain/Valvetronic:** The 6.0L V8 uses a timing chain (no belt), but it still requires periodic inspection for stretch or wear. Valvetronic (variable valve timing) may need attention if the engine is modified or driven aggressively.

- **Oil and Filter Changes:** The 6.0L V8 is oil-hungry and benefits from frequent oil changes (every 5,000 7,500 miles) to prevent sludge buildup.

- **Cooling System:** Overheating is a risk if the radiator, water pump, or thermostat fails. The 6.0L V8 is prone to coolant leaks from the thermostat housing or water pump.

3. **Common 6.0L V8 Issues**

- **Exhaust Manifold Leaks:** Cast-iron manifolds can crack over time, leading to hissing noises and reduced performance.

- **Rod Bearings:** Some examples develop rod bearing wear, which can cause knocking noises or catastrophic failure if ignored.

- **Fuel System:** The fuel injectors and fuel pump may require cleaning or replacement over time, especially if the vehicle has high mileage.

- **Transmission (6L80/6L90):** If the Tahoe is equipped with an automatic transmission, fluid changes and potential torque converter issues should be monitored.

4. **Lowered Suspension Drawbacks**

- **Reduced Ground Clearance:** A lowered Tahoe may have difficulty clearing speed bumps, curbs, or uneven surfaces, risking damage to the undercarriage or suspension.

- **Potential for Poor Handling:** If the suspension was not properly tuned, it may lead to oversteer, understeer, or a harsh ride.

- **Tire Wear:** Lowered vehicles often wear tires faster due to increased stress on the edges of the tread.

5. **Fuel Economy Trade-Offs**

The 6.0L V8 is not fuel-efficient, especially when towing or driving aggressively. Expect around **12 16 MPG combined**, which can be costly for long-distance driving.

6. **Depreciation and Age**

The 2012 Tahoe is now over a decade old, and while it may still be reliable, parts and labor costs can be higher than for newer vehicles. The vehicle may also require more frequent maintenance to stay in good condition.

7. **Potential Modification Risks**

If the suspension was lowered by an inexperienced mechanic or with subpar parts, it could lead to alignment issues, uneven tire wear, or even suspension failure. Always verify the quality of modifications.

---

### **Conclusion**

A **2012 Chevrolet Tahoe with a GM8B12 (6.0L V8) and lowered suspension** can be a solid purchase if you prioritize power, towing capability, and durability. The 6.0L V8 is a robust engine that can last well with proper maintenance, and the Tahoe s size and features make it ideal for families or those needing a versatile SUV. However, the lowered suspension introduces risks to ride comfort, handling, and long-term suspension health, which must be carefully considered.

If you plan to drive the vehicle primarily on highways, tow occasionally, and are willing to invest in maintenance, this Tahoe could be a great choice. However, if you prefer a smoother ride, better fuel economy, or plan to use it for off-roading, a higher-riding or differently modified Tahoe might be more suitable.

---

### **Recommendation**

- Engine condition (compression, rod bearing wear, exhaust leaks).

- Suspension health (shocks, springs, bushings, alignment).

- Transmission fluid and condition.

- Cooling system integrity.

- Tire wear and alignment.

Ensure the lowering was done professionally and that all components (shocks, springs, sway bars, bushings) are in good condition. Check for uneven tire wear or signs of misalignment.

Confirm that the vehicle has had regular oil changes, timing chain inspections, and other critical services. A well-documented service record is a strong indicator of reliability.

- Suspension upgrades if needed.

- Transmission fluid changes.

- Cooling system maintenance.

- Exhaust manifold repairs if leaking.

- You prioritize fuel efficiency over power (consider a diesel or hybrid option).

- You need a smoother ride (look for a higher-riding Tahoe).

- You plan frequent off-roading (ensure the suspension is properly reinforced).

If you find a **well-maintained 2012 Tahoe with a clean 6.0L V8 and properly modified suspension**, it can be a **great long-term vehicle** for those who need power, space, and durability. However, be prepared for higher maintenance costs and potential suspension-related issues. If you re comfortable with the trade-offs, this Tahoe could be a **solid buy** just ensure it s thoroughly inspected before purchasing.

Details:

Residential delivery is not included in the free shipping.

part #: 640.gm8b12 price

• $135.00

specifications trunklipa:

• for models: Tahoe
• for makes: Chevrolet
• for years: 2012
• brand: Chevrolet Truck
• part type: Lid Motor Down
• conditions options: Ltz
• genuine oem: Yes
• ipn: 640.gm8b12
• manufacturer warranty: 90 Day
• partout id: A-122307939

general trunklipa:

• Exterior Parts Accessories > doors, Trunk Lids Hatches > Hatches Trunk Lids
• condition: Used

returns trunklipa:

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

shipping trunklipa:

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

seller trunklipa:

• city: Knoxville, Tennessee
• # reviews: 10981
• rating: 99.0%

offer trunklipa:

• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock
• started: April 10, 2026

payments trunklipa:

• other
• credit card: Diners-club
• wallet: Paypal

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