GATES SX-9579 Fuel Tank Cap 4.8L 5.0L 5.7L 6.2L

( Brand: Gates ), ( Manufacturer Part Number: SX-9579 ), ( 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: C697 10-28 ), ( Compatible Model: C2500 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 4.8l 5.0l 5.7l 6.2l Sm fits SUBURBAN C2500 1979–1999

The **Gates SX-9579 Fuel Tank Cap** is a meticulously engineered replacement part designed to ensure a secure, leak-proof, and reliable fit for the 1979 through 1999 GMC C2500 Suburban models equipped with a 4.8L, 5.0L, 5.7L, or 6.2L V8 engine. Crafted from high-quality, durable materials, this fuel cap is built to withstand the demands of daily driving, harsh weather conditions, and the constant exposure to fuel vapors, preventing evaporation and maintaining optimal fuel system performance. The cap features a robust, tamper-resistant design with a precise sealing mechanism that minimizes fuel loss while adhering to emissions regulations, ensuring compliance with modern vehicle standards. Its ergonomic grip allows for easy installation and removal, even in tight spaces, while the integrated venting system helps regulate internal pressure, reducing the risk of fuel tank swelling or leaks. The Gates SX-9579 is engineered to match the exact specifications of the original equipment manufacturer (OEM) cap, guaranteeing a perfect fit and seamless integration with the vehicle s fuel system. Whether used for routine maintenance, replacement after damage, or as a preventive measure against wear and tear, this fuel cap delivers the durability and performance expected from a Gates product, helping to extend the life of your GMC s fuel system and maintain peak engine efficiency.

### **Pros and Cons of buying a Gates SX-9579 Fuel Tank Cap for a 1979 1999 GMC C2500 Suburban (4.8L 6.2L V8)**

1. **OEM Fitment** The Gates SX-9579 is designed as an original equipment replacement part, ensuring a proper fit without modifications. It matches the dimensions and threading of the factory fuel cap on these GMC models.

2. **Durable Construction** Gates is a reputable manufacturer known for high-quality, long-lasting automotive components. The cap is made from sturdy materials that resist warping, cracking, or corrosion over time.

3. **Seal Integrity** The rubber gasket is engineered to create a tight seal, preventing fuel vapors from escaping and reducing the risk of fuel loss or contamination.

4. **Easy Installation** The design is straightforward, requiring basic tools (no special equipment). Most DIYers can install it without professional help.

5. **Compatibility with Multiple Engines** The cap fits all listed engine sizes (4.8L, 5.0L, 5.7L, 6.2L V8) in the specified GMC Suburban models, making it a versatile choice.

6. **Fuel Pump Protection** A properly sealed cap prevents moisture, debris, and fuel vapor buildup, which can damage the fuel pump and injectors over time.

7. **Visual Consistency** The cap matches the factory appearance, maintaining the vehicle s original look if aesthetics are a concern.

1. **Price** As an OEM replacement, the Gates SX-9579 may be more expensive than aftermarket alternatives, though the quality often justifies the cost.

2. **Limited Availability** Depending on the region, finding this specific part in stock may require ordering online, which could introduce shipping delays.

3. **Potential Counterfeit Concerns** Some third-party sellers may offer fake Gates parts. Buying from authorized dealers or reputable retailers (e.g., RockAuto, Amazon, or local auto parts stores) reduces this risk.

4. **Sticking Issues** Older fuel tanks or caps can develop gumming due to fuel additives or sediment. If the tank is heavily contaminated, the new cap may still have difficulty opening or closing smoothly.

5. **No Additional Features** Unlike some aftermarket caps, this is a basic replacement with no extra benefits (e.g., fuel line filters, pressure relief valves, or LED indicators).

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### **Conclusion**

The **Gates SX-9579 fuel tank cap** is a reliable, high-quality choice for restoring or maintaining the fuel system in a 1979 1999 GMC C2500 Suburban with the listed engines. Its OEM fitment, durability, and seal integrity make it a practical investment for preventing fuel system issues. However, the cost and potential for counterfeit products are minor drawbacks that can be mitigated by purchasing from trusted sources.

If budget is a concern, aftermarket alternatives (e.g., from **ACDelco, Fram, or local brands**) may offer similar performance at a lower price, but they may not always match the precision of Gates. For those prioritizing longevity and fitment, the Gates cap is the safest bet.

Purchase the **Gates SX-9579 from an authorized retailer** (e.g., RockAuto, Amazon, or a local auto parts store with a return policy) to ensure authenticity. If the fuel tank is heavily contaminated, consider cleaning it with a fuel system cleaner or using a fuel stabilizer before installing the new cap. For most users, this is the best balance of quality and compatibility.

Details:

Gates Fuel Tank Cap for 1979 1999 GMC C2500 Suburban 4.8L 5.0L 5.7L 6.2L sm: Status: In Stock.

part #: sx9579 prices

• $8.76-$59.68

specifications fueltanksysteme:

• for models: C2500, Suburban
• for makes: Gmc
• for years: 1979-1999
• brand: Gates
• mpn: Sx-9579
• 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: C697 10-28
• compatible model: C2500 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

general fueltanksysteme:

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

payments fueltanksysteme:

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

offer fueltanksysteme:

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

seller fueltanksysteme:

• rating: 99.6%
• city: Indianapolis, Indiana
• # reviews: 660738

shipping fueltanksysteme:

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

returns fueltanksysteme:

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

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