BUICK 650.GM4A20 Rear Body Wire Harness

( Model: ENCLAVE ), ( Part Type: Wire Harness ), ( Conditions Options: Rear Park Assist Wire Harness ), ( Genuine Oem: Yes ), ( Ipn: 650.gm4a20 ), ( Warranty: 1 Year )

Review BUICK Rear Body Wire Harness Oem fits ENCLAVE 650 2020

The **Buick 650.GM4A20 Rear Body Wire Harness for the 2020 Enclave** is a meticulously engineered, high-quality electrical component designed to ensure seamless connectivity and reliable performance within the rear body control module (RBCM) system of General Motors 2020 Buick Enclave. This harness is a critical part of the vehicle s electrical architecture, facilitating communication between the rear body electronics, including the rear door locks, liftgate release, rear window defogger, and other rear-mounted sensors and actuators. Constructed with **GM-approved, automotive-grade wiring and connectors**, this harness is built to withstand the demanding conditions of daily driving, including exposure to temperature fluctuations, moisture, and mechanical stress, while maintaining optimal signal integrity and durability.

The **650.GM4A20 Rear Body Wire Harness** features a **modular and organized wiring layout**, ensuring that each circuit is clearly labeled and routed to minimize interference and maximize efficiency. The harness incorporates **shielded and unshielded wires** as needed, with **high-quality crimp terminals and corrosion-resistant connectors** to prevent oxidation and ensure long-term reliability. The design adheres to GM s stringent manufacturing standards, incorporating **heat-resistant insulation** and **abrasion-proof jacketing** to protect against wear and tear from vibration, sharp edges, or environmental contaminants. Additionally, the harness includes **pre-terminated connectors** that are compatible with the Enclave s rear body control module, tailgate release mechanism, and other rear-mounted components, simplifying installation and reducing the risk of wiring errors.

For technicians and DIY enthusiasts, this harness is an ideal replacement for damaged or worn-out wiring in the rear body system, helping to restore proper functionality to critical features such as the **rear door locks, liftgate unlock button, and rear window defogger**. Its **direct OEM compatibility** ensures that it fits seamlessly into the Enclave s electrical system without the need for modifications, providing a hassle-free upgrade or repair solution. Whether addressing a wiring failure, upgrading an aftermarket accessory, or performing routine maintenance, the **Buick 650.GM4A20 Rear Body Wire Harness** delivers the precision, reliability, and performance expected from a genuine GM component.

### **Pros and Cons of buying a Buick 650.GM4A20 Rear Body Wire Harness (2020 Enclave)**

The **Buick 650.GM4A20 rear body wire harness** for the 2020 Enclave is a critical component for electrical functionality in the vehicle s rear systems. Here are the key advantages of purchasing this part:

1. **Direct Fitment** Designed specifically for the 2020 Buick Enclave, ensuring compatibility without modifications. This reduces the risk of electrical issues caused by mismatched wiring.

2. **Reliability** Buick and GM are known for durable wiring harnesses, especially in newer models. A high-quality harness minimizes the risk of shorts, corrosion, or loose connections, which can lead to intermittent electrical failures.

3. **Prevents Common Issues** Many rear wiring harness failures stem from wear, moisture, or poor connections. Replacing a faulty harness can resolve problems like:

- Non-functional rear lights (brake, turn signals, reverse)

- Malfunctioning tailgates or liftgates

- Erratic sensor readings (e.g., parking sensors, rear cameras)

- Electrical gremlins in the rear power outlets or trunk controls

4. **Cost-Effective Long-Term Solution** While the upfront cost may seem high, replacing a damaged harness is often cheaper than repeated repairs for intermittent electrical faults. A new harness ensures a clean, properly routed wiring solution.

5. **Warranty Coverage** If purchased from an authorized dealer or reputable aftermarket supplier, the harness may come with a warranty, providing peace of mind against manufacturing defects.

6. **Improved Safety** Properly functioning rear lighting and sensors enhance visibility and safety, reducing the risk of accidents during nighttime driving or low-visibility conditions.

7. **Compatibility with Upgrades** If you plan to install aftermarket rear cameras, LED lighting, or other electrical modifications, a new harness ensures proper grounding and power delivery.

---

1. **Labor Costs** Replacing a rear body harness is labor-intensive, requiring disassembly of the rear seats, trunk, and possibly the liftgate. This can add significant cost if done professionally.

2. **Complex Installation** The harness involves routing wires through tight spaces, securing connections, and ensuring no pinched or damaged wires remain. DIY installation may be challenging for inexperienced mechanics.

3. **Potential for Counterfeit Parts** Purchasing from untrusted sellers risks receiving a low-quality or fake harness, which could fail prematurely or cause further electrical issues.

4. **Additional Components May Be Needed** If the harness failure is due to water intrusion, corrosion, or physical damage, related parts (e.g., waterproof seals, connectors, or ground straps) may also require replacement.

5. **Time-Consuming Repair** The process of removing and reinstalling the harness can take several hours, especially if the vehicle s interior or exterior panels must be partially disassembled.

6. **Cost of the Part Itself** Depending on the supplier, the harness may be priced higher than expected, particularly if sourced from GM or an authorized dealer. Aftermarket options can be cheaper but may vary in quality.

7. **Risk of Overlooking Underlying Issues** If the harness failure is symptomatic of a deeper problem (e.g., water damage, poor grounding, or a failing fuse block), replacing just the harness may not fully resolve the issue.

---

### **Conclusion**

The **Buick 650.GM4A20 rear body wire harness** is a **highly recommended replacement** for the 2020 Enclave when electrical issues in the rear systems are present. Its direct fitment, reliability, and ability to prevent recurring problems make it a worthwhile investment. However, the **labor-intensive installation** and **potential for hidden issues** mean that this repair should be approached carefully either by a skilled mechanic or someone with experience in automotive electrical work.

If you re experiencing **rear lighting failures, sensor malfunctions, or intermittent electrical gremlins**, this harness is likely the best solution. Just ensure you **source it from a trusted supplier** and **budget for professional installation** if needed.

- **If you re confident in DIY repairs**, purchase the harness from a reputable dealer (e.g., RockAuto, PartsGeek, or an authorized Buick/GMC parts store) and follow a detailed wiring diagram during installation.

- **If unsure about installation**, consult a Buick-certified mechanic to handle the replacement, as improper routing or connections could lead to further electrical problems.

- **Check for water damage or corrosion** in the harness or surrounding components addressing these issues simultaneously will improve long-term reliability.

- **Consider a warranty** if available, as it provides protection against premature failure.

Ultimately, replacing a faulty rear body harness is a **proactive step** to restore functionality and prevent more costly repairs down the road.

Details:

Please compare part numbers BEFORE purchasing. Quality, Assured Parts All are Quality Tested Inspected. Model: ENCLAVE. If something is wrong with an order, we certainly do want to help you.

Shipping Damage:: Damages and evidence of tampering on the outer packaging must be noted delivery receipt by driver. Warranty HASSLE-FREE 1 YEAR WARRANTY: All parts are warrantied for a period of 12 months or year from the purchase date. REAR BODY WIRE HARNESS OEM 2020 BUICK ENCLAVE: PARK ASSIST Included: Hassle-free 1 Year Warranty Our Part #: 9417240. Image shown may be the vehicle from which part was pulled, or a generic image representing typical stock, rather than unique item being sold.

Very happy customer, excellent value and service. Easy to find parts that don't require a mechanics knowledge. Please disregard other fitment charts they may not be correct. More Parts: 1 Year Warranty.

Free shipping only applies to items you keep.

specifications tusilap:

• for models: 650, Enclave
• for makes: Buick
• for years: 2020
• model: Enclave
• part type: Wire Harness
• conditions options: Rear Park Assist Wire Harness
• genuine oem: Yes
• ipn: 650.gm4a20
• warranty: 1 Year

payments tusilap:

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

returns tusilap:

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

shipping tusilap:

• cost: $35.00
• class: Freight
• service: Flat Rate Freight
• type: Fixed

offer tusilap:

• quantity: 1
• availability: In Stock
• started: February 9, 2026
• best offers: True
• sold: 0
• options: Ship-to-home

general tusilap:

• Commercial Truck Parts > Lighting > Wiring Fuses
• condition: Used

seller tusilap:

• city: Rancho Cordova, California
• # reviews: 22893
• rating: 97.1%

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