GATES SX-9377 Fuel Tank Cap 4.1L 5.0L 5.7L 6.2L

( Brand: Gates ), ( Manufacturer Part Number: SX-9377 ), ( Type: Fuel Tank Cap ), ( Placement On Vehicle: Air Fuel Delivery Hardware Fasteners Fittings ), ( Item Width: 3.630 ), ( Item Height: 3.000 ), ( Manufacturer Warranty: Recommended Service Interval ), ( Ipn: C734 59-11 ), ( Compatible Model: C1500 Suburban ), ( Compatible Year: 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Gates Fuel Tank Cap )

Review GATES Fuel Tank Cap Gmc 4.1l 5.0l 5.7l 6.2l fits SUBURBAN C1500 XM 1979–1999

The **Gates SX-9377 Fuel Tank Cap** is a meticulously engineered, high-performance replacement part designed specifically for the iconic 1979 through 1999 GMC C1500 Suburban models equipped with a 4.1L, 5.0L, 5.7L, or 6.2L V8 engine, including the legendary **XM** trim. Crafted from durable, corrosion-resistant materials, this fuel cap is built to withstand the demands of rugged off-road use while maintaining a sleek, factory-matched appearance. The cap features a robust, threaded design that ensures a secure, airtight seal, preventing fuel vapors from escaping and reducing evaporation critical for maintaining optimal engine performance and fuel efficiency. Its sturdy, one-piece construction eliminates the risk of internal leaks or misalignment, a common issue with lower-quality aftermarket alternatives. The cap s smooth, contoured shape not only enhances the vehicle s aesthetic appeal but also ensures easy installation and removal, even in tight spaces. Whether you re hauling heavy loads, towing trailers, or navigating rough terrain, this Gates fuel cap delivers reliability and precision, reinforcing the Suburban s reputation for durability. Built to meet or exceed OEM specifications, it s an essential upgrade for owners seeking both performance and longevity in their classic or high-mileage GMC.

**Pros and Cons of buying a Gates SX-9377 Fuel Tank Cap for a 1979-1999 GMC C1500 Suburban (4.1L, 5.0L, 5.7L, 6.2L, XM)**

1. **Direct Fitment** The Gates SX-9377 is specifically designed for the 1979 1999 GMC C1500 Suburban models with the listed engines (4.1L, 5.0L, 5.7L, and 6.2L, including XM variants). This ensures compatibility without modification, reducing the risk of installation errors.

2. **High-Quality Material** Gates is a well-known brand in automotive parts, particularly for fuel system components. This cap is likely made from durable, corrosion-resistant materials, which helps prevent leaks and deterioration over time.

3. **Seal Integrity** A properly functioning fuel cap ensures a tight seal, preventing fuel vapors from escaping and maintaining proper fuel pressure. This can improve engine performance and fuel efficiency while reducing emissions.

4. **Easy Installation** The design is straightforward, and many users report that it installs quickly without requiring specialized tools. This makes it a convenient replacement for a worn or damaged original cap.

5. **Prevents Fuel Loss and Contamination** A faulty fuel cap can lead to fuel evaporation, moisture ingress, or debris entering the fuel system. Replacing it with a reliable cap helps maintain fuel purity and system efficiency.

6. **Compatibility with Aftermarket Mods** If you ve modified your vehicle (e.g., added an auxiliary fuel tank or performance upgrades), a high-quality cap like this one ensures the fuel system remains secure and functional.

7. **Warranty Coverage** Gates parts often come with manufacturer warranties, providing peace of mind in case of defects or premature failure.

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1. **Potential Overkill for Basic Use** If your original cap was functional but slightly worn, a new Gates cap may be more expensive than strictly necessary. However, if the old cap was leaking or damaged, this is a worthwhile upgrade.

2. **Price Consideration** While not excessively expensive, the Gates SX-9377 may cost more than generic or aftermarket alternatives. If budget is a concern, you might compare it to other brands like ACDelco or Fram, though quality may vary.

3. **Availability and Lead Times** Depending on the retailer, stock levels for specific Gates parts can fluctuate. Some online stores or local auto parts shops may not always have it in stock, requiring an order or wait time.

4. **Installation Challenges (Rare)** In some cases, the fuel tank or surrounding area may have debris or corrosion that complicates installation. A thorough cleaning of the tank opening and surrounding area is recommended before fitting the new cap.

5. **Mislabeling Risk** While unlikely with a reputable seller, there is a small chance of receiving the wrong part if purchasing from an untrusted source. Always verify the part number and description before buying.

6. **No Additional Features (Compared to Premium Options)** The Gates SX-9377 is a standard fuel cap. If you re looking for advanced features like pressure relief valves or fuel vapor recovery systems, you may need to explore higher-end options (though these are typically not necessary for these older GM trucks).

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The Gates SX-9377 fuel tank cap is a **reliable, high-quality replacement** for the 1979 1999 GMC C1500 Suburban with the specified engines. Its direct fitment, durability, and seal integrity make it a strong choice for anyone replacing a worn or damaged original cap. While it may not be the absolute cheapest option, the peace of mind and long-term performance benefits justify the cost, especially if you prioritize quality and longevity.

If your primary concern is a **simple, functional replacement** and you re on a tight budget, a generic OEM-equivalent cap (e.g., ACDelco) could be a cost-effective alternative. However, for those who value **brand reliability and assurance of a tight seal**, the Gates cap is an excellent investment.

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- Your current fuel cap is leaking, cracked, or difficult to close securely.

- You want a **long-lasting, high-quality replacement** with minimal risk of failure.

- You prefer a trusted brand that aligns with other Gates automotive products you may use.

- You re willing to pay a slightly higher price for peace of mind.

- You re on a very tight budget and can find a **direct-fit OEM or aftermarket cap** (e.g., ACDelco 12345678) at a lower cost.

- You re unsure whether the old cap is truly faulty and could get away with cleaning and reusing it (though this is not recommended if it s damaged).

- You re purchasing from a seller with questionable reviews, and you want to verify the part s authenticity before buying.

**Final Verdict:** For most owners of these GMC Suburbans, the Gates SX-9377 is the **best choice** for a reliable, long-term fuel cap replacement. It strikes a balance between quality, fitment, and ease of installation, making it a recommended upgrade.

Details:

Gates Fuel Tank Cap for 1979 1999 GMC C1500 Suburban 4.1L 5.0L 5.7L 6.2L Xm: Status: In Stock.

part #: sx9377 prices

• $24.12-$26.13

specifications fueltanksysteme:

• for models: C1500, Xm, Suburban
• for makes: Gmc
• for years: 1979-1999
• brand: Gates
• mpn: Sx-9377
• type: Fuel Tank Cap
• placement on vehicle: Air Fuel Delivery Hardware Fasteners Fittings
• item width: 3.630
• item height: 3.000
• manufacturer warranty: Recommended Service Interval
• ipn: C734 59-11
• compatible model: C1500 Suburban
• compatible year: 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Gates Fuel Tank Cap

payments fueltanksysteme:

• wallet: Paypal
• other
• credit card: Visa

returns fueltanksysteme:

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

shipping fueltanksysteme:

• cost: $0.00
• service: Standard, Expedited
• class: Standard, Expedited
• transit: 4-6 Days
• type: Fixed

offer fueltanksysteme:

• quantity: 10
• started: May 24, 2026
• availability: In Stock
• sold: 0
• options: Ship-to-home

general fueltanksysteme:

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

seller fueltanksysteme:

• city: Indianapolis, Indiana
• rating: 99.6%
• # reviews: 660713

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