DORMAN 55299 Fuel Tank Cap 889245966421

( Brand: Dorman ), ( Manufacturer Part Number: 55299 ), ( Part Type: Fuel Tank Cap ), ( Product Type: Fuel Delivery ), ( UPC: 889245966421 ), ( Fitment Type: Direct Replacement ), ( Partslink Number: 84766925, 84695998, 84712261, 84009129, 84044750, 84214460 ), ( Compatible Make S : Chevrolet, Gmc, Cadillac ), ( Compatible Model S : Silverado 1500, Silverado 2500 Hd, Silverado 3500 Hd ), ( Fitnote: Bedlength ), ( Product Subtype: Fuel Tanks ), ( Department: Replacement )

Review DORMAN Chevy Fuel Tank Cap fits SILVERADO 1500 2017–2021

The **Dorman 55299 Fuel Tank Cap** is a high-quality, direct-fit replacement designed specifically for the **2017-2021 Chevrolet Silverado 1500** with the **5.3L V8 (L83/LT4)** or **6.2L V8 (L86/L96)** engines, ensuring a secure and reliable seal for your fuel system. Crafted from durable, corrosion-resistant materials, this fuel cap is engineered to meet or exceed OEM specifications, providing an airtight fit that prevents fuel vapors from escaping while maintaining proper pressure within the tank. The cap features a robust, threaded design that aligns perfectly with the Silverado s fuel filler neck, reducing the risk of leaks or improper installation. Its sleek, black finish not only enhances the vehicle s aesthetic but also resists fading and wear, ensuring long-term durability even in harsh driving conditions. Whether you re addressing a faulty original cap, upgrading for better performance, or simply replacing a worn-out component, the Dorman 55299 delivers a dependable solution that restores both functionality and peace of mind. Built to withstand the demands of daily driving, this replacement part is a trusted choice for mechanics and DIY enthusiasts alike, offering the reliability you expect from the Dorman brand.

The **Dorman 55299** is a fuel tank cap replacement designed for the **2017-2021 Chevrolet Silverado 1500** (and related GM trucks). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros of the Dorman 55299 Fuel Tank Cap**

1. **Direct Fitment and Compatibility**

- The part is specifically engineered for the **2017-2021 Silverado 1500**, including the **HD and Regular Cab models**, as well as the **C/K trucks**. This reduces the risk of sizing issues or improper sealing compared to aftermarket alternatives that may not match GM s exact specifications.

2. **High-Quality Materials**

- Dorman is known for using durable materials, including **stainless steel or reinforced plastic** in critical components. The cap is designed to resist corrosion, which is important for trucks exposed to harsh conditions (salt, moisture, etc.).

3. **Seal Integrity and Fuel Vapor Control**

- The cap includes a **vapor-tight seal** and a **fuel vapor control valve (FVC)**, which helps maintain proper emissions compliance. This is particularly important for modern trucks with **OBD-II systems** that monitor fuel system integrity.

4. **Easy Installation**

- The part is designed for straightforward installation, requiring only basic tools (screwdriver, socket set, and possibly a pry bar to remove the old cap). No special equipment is needed, and most DIYers can complete the job in under an hour.

5. **Warranty and Reliability**

- Dorman parts come with a **standard warranty** (typically 1 year or more), providing peace of mind against defects. The brand is also widely trusted in the automotive aftermarket for longevity.

6. **Cost-Effective Replacement**

- While not the cheapest option, it is **priced competitively** compared to OEM (General Motors) replacements. For example, an OEM cap can cost significantly more, while generic aftermarket caps may lack durability.

7. **Prevents Fuel Leaks and Contamination**

- A faulty or damaged fuel cap can lead to **fuel evaporation, vapor leaks, or debris entering the tank**. Replacing it with a Dorman cap helps prevent these issues, which could otherwise lead to **check engine lights (CEL), poor fuel economy, or even engine damage** from contamination.

8. **Positive User Feedback**

- Many reviews from truck owners report **no leaks, proper sealing, and ease of installation** with this part. It is frequently recommended in forums and online marketplaces for its balance of quality and affordability.

---

### **Cons of the Dorman 55299 Fuel Tank Cap**

1. **Potential for Counterfeit or Low-Quality Units**

- Like many aftermarket parts, there is a risk of **counterfeit Dorman products** entering the market, especially on third-party websites. Buyers should purchase from **authorized retailers** (e.g., RockAuto, Amazon, local auto parts stores) to ensure authenticity.

2. **Minimal Aesthetic Differences from OEM**

- While functional, the Dorman cap may not have the **exact same finish or styling** as the original GM part. However, this is rarely an issue unless the owner prioritizes a factory look.

3. **No Significant Performance Upgrades**

- The cap does not offer any **performance benefits** beyond replacing a worn or damaged part. It is not designed to improve fuel efficiency or engine power only to restore proper function.

4. **Possible Over-Tightening Risk**

- Some users report that if the cap is **over-tightened**, the threads or seal can be damaged. It is important to follow the **recommended torque specification** (usually around **20-25 ft-lbs**) to avoid stripping the threads.

5. **Limited Availability of Replacement Seals**

- If the **internal seal or vapor valve fails** after installation, finding a replacement specifically for the Dorman cap may be **less straightforward** than sourcing an OEM seal. Some users have reported difficulty locating compatible seals from Dorman or GM.

6. **Not a Permanent Fix for Underlying Issues**

- If the **fuel tank itself is damaged** (e.g., cracks, rust holes), replacing just the cap will not resolve the problem. The owner should inspect the tank for leaks or corrosion before installation.

7. **Potential for Misalignment During Installation**

- The fuel tank cap is located on the **driver s side rear fender**, and accessing it may require **removing the gas cap, unplugging the fuel line, and possibly draining a small amount of fuel** for easier removal. Some users find this process slightly more involved than expected.

---

### **Conclusion**

The **Dorman 55299 fuel tank cap** is a **reliable, high-quality replacement** for the **2017-2021 Chevrolet Silverado 1500**, offering a strong balance of **durability, compatibility, and ease of installation**. It addresses common issues like **fuel leaks, check engine lights, and vapor loss** while maintaining proper emissions compliance. The part is **cost-effective compared to OEM alternatives** and widely trusted by truck owners.

However, buyers should **purchase from reputable sources** to avoid counterfeit products and **follow installation guidelines carefully** to prevent damage. While not a high-performance upgrade, it is a **practical and necessary replacement** for any damaged or worn fuel cap.

---

### **Recommendation**

- You need a **direct-fit, reliable replacement** for your Silverado 1500 s fuel cap.

- You want a **trusted brand** with good warranty coverage.

- You are replacing a **leaking, cracked, or corroded** cap to avoid check engine lights and fuel system issues.

- You plan to **install it yourself** and have basic mechanical skills.

- You are on a **very tight budget** and can find a **highly rated generic cap** (e.g., from **Spectre, Balqon, or AC Delco**) that fits well.

- You suspect **underlying fuel tank damage** and need a professional inspection before replacement.

- You prioritize **exact OEM appearance** (though functionality is more important for most owners).

For most **2017-2021 Silverado 1500 owners**, the **Dorman 55299 is the best choice** it is **reliable, easy to install, and widely available**. Purchase from a **trusted retailer** (e.g., RockAuto, Amazon, or a local auto parts store) to ensure authenticity, and follow installation steps carefully to avoid issues. If the cap fails prematurely, Dorman s warranty should cover it.

Details:

Replaces Original OE Part #: 84766925, 84695998, 84712261, 84009129, 84044750, 84214460, 84626777, 84308352, 84696034, 84868026, 84707997, 84760199, 84868021, 84868020, 84696025, 84683322. Lockable: No. Offering a win-win combination of the finest materials, precision engineering and innovation, this performance fuel system part delivers hardcore strength, long-term dependability, outstanding operation. Includes: Fuel Tank Cap.

Specifications: Depth: 14.82mm. Type: Pull Off. Designed to help you maximize your vehicles fuel system efficiency. Made from premium materials to ensure superior quality and durability.

Material: Plastic. Fuel Tank Cap 55299 by Dorman. Manufactured to be tough as nails withstand high-heat and high-pressure conditions. Color: Black.

Type: Press On.

part #: 55299 prices

• $7.00-$20.00

specifications fueltanksysteme:

• for models: 1500, Silverado
• for makes: Chevy
• for years: 2017-2021
• brand: Dorman
• mpn: 55299
• part type: Fuel Tank Cap
• product type: Fuel Delivery
• upc: 889245966421
• fitment type: Direct Replacement
• partslink number: 84766925, 84695998, 84712261, 84009129, 84044750, 84214460
• compatible make s : Chevrolet, Gmc, Cadillac
• compatible model s : Silverado 1500, Silverado 2500 Hd, Silverado 3500 Hd
• fitnote: Bedlength
• product subtype: Fuel Tanks
• department: Replacement

offer fueltanksysteme:

• quantity: 5
• sold: 0
• started: May 1, 2026
• options: Ship-to-home
• availability: In Stock

shipping fueltanksysteme:

• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx
• cost: $21.26
• type: Calculated
• transit: 4-7 Days
• class: Standard

returns fueltanksysteme:

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

general fueltanksysteme:

• condition: New
• Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks

seller fueltanksysteme:

• # reviews: 157218
• city: Fort Smith, Arkansas
• rating: 99.2%

payments fueltanksysteme:

• credit card: Discover
• wallet: Paypal
• other

Dorman 55299 Is Similar To:

• 019495103219 Dorman Fuel Vapor Leak Detection Pump (25.2% similar) This item has been cleaned and sanitized to ensure your complete satisfaction. Package content retail box may show signs of wear and be removed to securely ship the item. Cosmetic condition retail box may show signs of wear and be removed to securely ship the item. Get-warranty and enter the item ...(March 28th, 2018)
• 157-5509 Dorman Fuel Gas Tank Step Stair Lh Or Rh For (31.6% similar) Questions: were here for you. Dorman fuel gas tank step stair LHS or Rh for Mack truck new detailed applications SIZE:21. 9 of packages the same day if ordered before 4PM est...(January 8th, 2019)
• 285-5104 Dorman Fuel Sending Unit (29.8% similar) L6 diesel turbocharged page 1 of 30...(September 4th, 2018)
• 285-5110 Dorman Fuel Tank Sender (36.6% similar) Dorman designs packages and markets over different products manufactured to its specifications. About the brand Dorman: Dorman is a leading supplier of original equipment dealer exclusive automotive replacement parts hardware and brake fasteners to aftermarket household organizational products mass ...(June 28th, 2018)
• 285-5503 Dorman Fuel Sending Unit 019495423065 (26.2% similar) Dorman fuel sending unit Dorman restores proper gauge readings. Since this part is direct replacement, the exact fit adds another layer of convenience. All units include the necessary installation hardware and lock rings for a bolt-off bolt-on solution...(June 21st, 2018)
• 285-5504 Dorman Fuel Tank Sender (36.6% similar) Dorman designs packages and markets over different products manufactured to its specifications. With the exception of this paragraph, all product specifics, images and vehicle fitment chart are populated by motors. About the brand Dorman: Dorman is a leading supplier of original equipment dealer ...(July 22nd, 2018)
• 285-5506 Dorman First Stop Fuel Tank Sending Unit 019495423096 (37.4% similar) Just the option. Your satisfaction is our motivation. Our expertise your car is one of most important investments so we treat vehicle as the asset it...(September 17th, 2018)
• 285-5509 Fuel Senders Dorman Hd Solutions 019495423126 (26.1% similar) 96009 dimensions: in. Year make model...(January 15th, 2019)
• 310-202 Dorman Fuel Vapor Leak Detection (27.7% similar) Dorman OE solutions supplied your vehicles manufacturer with the fuel tank filler misc. All products are covered by manufacturers warranty. We market approximately 133,000 products which are sold under several Dorman r sub-brands OE solutions?, help. Emission code: 1FEATURE - benefit 2: direct ...(March 12th, 2017)
• 310-205 Dorman Fuel Vapor Leak Detection (27.7% similar) Life cycle status code 2LIFE cycle status available to order material plastic nation AL popularity code outlet outside diameter. 9l standard cab pickup 2 door, st crew cab pickup 4 door, st extended cab pickup 2 door, st extended cab pickup 4 door, st standard cab pickup 2 door, SW extended cab ...(December 15th, 2016)
• 310-208 Dorman Fuel Vapor Leak Detection Pump 019495103387 (23.5% similar) Emission code: 1FILTER included: no harmonized tariff schedule b inlet outside diameter. Brands: cortex automotive division, eng. Life cycle status code: 2LIFE: available to order material: plastic national popularity code: cutlet outside diameter...(March 23rd, 2018)