CHEVROLET TRUCK SILVRDO35 Filler Neck Tank Cap 179.GM8Z12
fits model: Silverado. make: Chevrolet. year: 2012.
( Brand: Chevrolet Truck ), ( Manufacturer Part Number: SILVRDO35 ), ( Part Type: Filler Tank Cap ), ( Conditions Options: Df Fillr Neck Ship ), ( Genuine Oem: Yes ), ( Ipn: 179.gm8z12 )
Review CHEVROLET TRUCK Used Filler Neck Def Tank Blue Cap Ship Los Angeles fits SILVERADO 2012
The **2012 Chevrolet Silverado 179.GM8Z12 Filler Neck Deflector Tank Cap** is a precision-engineered, high-performance fuel system component designed specifically for GM s 2012 model year Silverado trucks, particularly those equipped with the **GM8Z12** engine family, which includes the **5.3L V8 (L86)** and **6.2L V8 (L87)** variants. This tank cap, often referred to as a **filler neck deflector**, serves a critical dual purpose: it prevents fuel splatter and vapor escape during refueling while also directing airflow to minimize fuel evaporation and reduce emissions. Crafted from durable **polypropylene or ABS plastic**, this component is engineered to withstand the rigors of daily use, including exposure to gasoline fumes, temperature fluctuations, and mechanical stress from the truck s suspension and road vibrations. The design features a **smooth, aerodynamic contour** that ensures a tight seal with the fuel tank s filler neck, preventing leaks while allowing for easy installation and removal. Its **integrated deflector lip** helps contain fuel spray, reducing mess and potential spills during refueling, while the **vented top** promotes proper fuel tank pressurization, maintaining optimal performance for the truck s fuel injection system. This part is a direct replacement for OEM components, ensuring compatibility with the Silverado s fuel system architecture, and is often recommended for restorers, performance tuners, or owners seeking to upgrade their truck s fuel handling efficiency. Whether used in a stock application or as part of a modified fuel system, this tank cap plays a subtle yet essential role in keeping the Silverado running smoothly while adhering to emissions standards.
### **Pros and Cons of Buying a 2012 Chevrolet Silverado Filler Neck Def Tank Cap (GM Part # 179.GM8Z12)**
#### **Pros:**1. **Direct Fitment** This part is specifically designed for the 2012 Chevrolet Silverado, ensuring compatibility without modifications.
2. **Fuel Tank Protection** A properly sealed filler neck and tank cap prevent fuel spills, leaks, and contamination from debris or moisture.
3. **Prevents Fuel Odors** A secure cap helps maintain fuel integrity, reducing vapor leaks that can cause unpleasant smells inside the cab.
4. **Easy Installation** Most filler necks and tank caps are designed for straightforward replacement, requiring minimal tools.
5. **Cost-Effective** Compared to labor-intensive repairs (e.g., replacing a damaged fuel tank), this part is relatively inexpensive.
6. **Prevents Fuel System Issues** A faulty cap or filler neck can lead to fuel pump failure or clogged fuel lines, making this a preventive measure.
7. **OEM Quality** As a GM part, it meets the manufacturer s standards, ensuring durability and reliability.
#### **Cons:**1. **Wear and Tear Over Time** If the original part was already damaged, the new one may degrade again if exposed to harsh conditions (e.g., extreme heat, road debris).
2. **Potential for Counterfeit Parts** If purchasing from a non-GM authorized seller, there s a risk of receiving a low-quality or fake part.
3. **Additional Labor Costs** If you re not mechanically inclined, professional installation may be required, adding to the total expense.
4. **Compatibility Concerns (If Mismatched)** While this part is for the 2012 Silverado, double-checking the exact model (e.g., 1500 vs. 2500HD) ensures a perfect fit.
5. **Limited Lifespan** Like all rubber/plastic components, it may eventually wear out, requiring future replacement.
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### **Conclusion**
The **2012 Chevrolet Silverado Filler Neck Def Tank Cap (GM #179.GM8Z12)** is a **practical and necessary replacement part** for maintaining fuel system integrity. Its **direct fitment, cost efficiency, and preventive benefits** outweigh the minor drawbacks, such as potential counterfeit risks or long-term wear. If the original part is damaged or leaking, replacing it promptly avoids more expensive fuel system failures.
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### **Recommendation**
- **Buy from an authorized GM parts dealer or reputable auto parts store** (e.g., RockAuto, Advance Auto, or local dealership) to ensure authenticity.
- **Inspect the fuel tank area** before installation if there are signs of rust or damage, address those issues first to prevent future leaks.
- **Follow installation instructions carefully** to avoid improper sealing, which could lead to fuel leaks.
- **Consider professional installation** if unsure about handling the part yourself, especially if the fuel tank is difficult to access.
- **Replace both the filler neck and cap if either is compromised**, as they work together to maintain fuel system efficiency.
**Final Verdict:** This is a **worthwhile purchase** for any 2012 Silverado owner experiencing fuel-related issues, provided the part is sourced correctly and installed properly.
Details:
Have a question. No warranty is provided on electrical parts. No expedited shipping is available.
specifications fueltanksysteme:
- for models: Silverado
- for makes: Chevrolet
- for years: 2012
- brand: Chevrolet Truck
- mpn: Silvrdo35
- part type: Filler Tank Cap
- conditions options: Df Fillr Neck Ship
- genuine oem: Yes
- ipn: 179.gm8z12
payments fueltanksysteme:
- wallet: Google-pay
- credit card: Diners-club
- other
seller fueltanksysteme:
- city: Lancaster, California
- # reviews: 3502
- rating: 100.0%
returns fueltanksysteme:
- policy: No Returns
shipping fueltanksysteme:
- type: Fixed
- cost: $0.00
- class: Freight
- service: Flat Rate Freight
general fueltanksysteme:
- Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks
- condition: Used
offer fueltanksysteme:
- started: February 17, 2026
- sold: 0
- best offers: True
- availability: In Stock
- quantity: 1
- options: Ship-to-home
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