1. Fuel Injectors Offers
  2. sku: 16048604184528721
  3. FEL PRO SX-6339

FEL-PRO SX-6339 Lower Fuel Injector Ring Savana Kit 4.8L

fits make: Gmc. year: 2001–2016.

Sx-6339 Fel-pro Lower Fuel Injector O-ring Kit For 2001-2016 Gmc Savana 3500 4.8l Wu

( Brand: Fel-pro ), ( Manufacturer Part Number: SX-6339 ), ( Type: Fuel Injector O-ring Kit ), ( Item Weight: 0.0500 ), ( Manufacturer Warranty: 1 Year ), ( Item Width: 4.000 ), ( Item Height: 0.120 ), ( Item Length: 6.000 ), ( Ipn: C785 60-31 ), ( Placement On Vehicle: Air Fuel Delivery Service Kits ), ( Compatible Model: Savana 3500 ), ( Compatible Year: 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 ), ( Core Charge: Free No Core Charge ), ( Position: Lower ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Fel-pro Fuel Injector O-ring Kit )

Review FEL PRO Lower Fuel Injector O ring Kit Gmc Savana 4.8l Wu fits 3500 2001–2016

The **Fel-Pro SX-6339 Lower Fuel Injector O-Ring Kit** is a premium, high-performance sealing solution specifically engineered for the **2001 2016 GMC Savana 3500** equipped with the **4.8L Vortec WU (Work Utility) V8 engine**. Designed to address common fuel system leaks and ensure optimal fuel delivery, this kit features a meticulously crafted set of **high-quality nitrile o-rings** that provide superior resistance to fuel, oil, and heat critical factors in maintaining long-term reliability in demanding applications like heavy-duty trucks and commercial vans. The o-rings are precision-molded to exact specifications, ensuring a perfect fit with the lower fuel injector assembly, preventing leaks that can lead to fuel waste, reduced engine performance, or even potential engine damage from improper fuel pressure. Fel-Pro s reputation for durability and engineering excellence is evident in this kit, which incorporates **reinforced construction** to withstand the harsh conditions of continuous use, including exposure to high-pressure fuel systems and temperature fluctuations. Whether installed during routine maintenance, a fuel system overhaul, or as a proactive measure to prevent leaks, this kit delivers a reliable, long-lasting seal that helps preserve the integrity of the fuel injectors and the overall efficiency of the engine. Built to meet or exceed OEM standards, the SX-6339 kit is an essential upgrade for fleet operators, truck owners, and mechanics who demand nothing less than the best in sealing technology for their high-mileage or heavy-duty vehicles.

### **Pros and Cons of buying a Fel-Pro SX-6339 Lower Fuel Injector O-Ring Kit for a 2001-2016 GMC Savana 3500 (4.8L V8 WU)**

#### **Pros:**

1. **Compatibility** The kit is specifically designed for the 4.8L V8 engine in the 2001-2016 GMC Savana 3500, ensuring a proper fit without modification.

2. **Quality Materials** Fel-Pro is a well-regarded brand known for durable, high-performance gaskets and seals, reducing the risk of leaks or premature failure.

3. **Prevents Fuel Leaks** Worn or damaged O-rings can cause fuel leaks, leading to fuel waste, potential fires, or engine damage. Replacing them proactively maintains system integrity.

4. **Easy Installation** The kit includes all necessary O-rings for the lower fuel injectors, simplifying the replacement process compared to sourcing individual parts.

5. **Cost-Effective Maintenance** Replacing O-rings early can prevent more expensive repairs, such as fuel rail or injector damage from fuel contamination.

6. **OEM-Quality Alternative** While not an exact OEM part, Fel-Pro parts are engineered to meet or exceed factory specifications, offering reliability without the premium price of genuine GM components.

7. **Prevents Engine Performance Issues** Faulty O-rings can lead to misfires, poor fuel delivery, or reduced engine efficiency, so replacement ensures optimal operation.

#### **Cons:**

1. **Limited Scope** The kit only covers the lower fuel injector O-rings, not the upper O-rings, fuel rail seals, or other related components. If those are also worn, additional parts may be needed.

2. **DIY Difficulty** While the installation is manageable for experienced DIYers, removing and reinstalling fuel injectors requires careful handling of fuel lines, electrical connectors, and torque specifications. Improper installation could lead to leaks or damage.

3. **Potential for Contamination** If the engine bay is dirty or if old O-rings leave debris behind, it could clog fuel injectors or fuel lines, necessitating additional cleaning.

4. **No Warranty on Labor** Fel-Pro provides a limited warranty on the parts themselves, but if installation goes wrong (e.g., leaks, damage), the user bears the cost of rework.

5. **Mixed Reviews on Durability** Some users report that Fel-Pro parts, while reliable, may not last as long as OEM components, especially in high-mileage or severe-service applications.

6. **Additional Tools May Be Needed** Specialty tools like an injector removal tool or torque wrench may be required for a clean installation, adding to the cost if not already owned.

---

### **Conclusion and Recommendation**

The **Fel-Pro SX-6339 Lower Fuel Injector O-Ring Kit** is a **solid choice** for maintaining or restoring fuel injector integrity in a 2001-2016 GMC Savana 3500 with a 4.8L V8 engine. The kit s compatibility, quality, and ease of use make it a practical solution for preventing fuel leaks and injector-related issues. However, it is **not a complete fuel system overhaul** users should also inspect and replace other components (e.g., upper O-rings, fuel rail seals) if they show signs of wear.

**Recommendation:**

- **Buy the kit** if you suspect or have confirmed worn lower injector O-rings, especially if you re experiencing fuel leaks, rough idling, or reduced power.

- **Consider professional installation** if you lack experience with fuel system work, as improper handling of injectors or fuel lines can cause further damage.

- **Pair with a fuel system cleaner** (e.g., Seafoam or Liqui Moly) during or after installation to remove contaminants that may have accumulated from old O-rings.

- **Check for complementary parts** (e.g., upper O-rings, fuel rail gaskets) if the engine has high mileage or a history of fuel-related issues.

For most DIYers with moderate mechanical skill, this kit provides a **cost-effective and reliable upgrade** that extends the life of the fuel injectors and prevents more serious problems down the road. If budget allows, pairing it with OEM or high-quality aftermarket upper O-rings (e.g., **Fel-Pro SX-6338** or **Duralast**) would offer even greater long-term protection.

Details:

Fel-Pro Lower Fuel Injector O-Ring Kit for 2001 - 2016 GMC Savana 3500 4.8L wu: Status: In Stock.

part #: sx6339 prices

  • $21.22-$91.81

specifications carfuelinjector:

  • for makes: Gmc
  • for years: 2001-2016
  • brand: Fel-pro
  • mpn: Sx-6339
  • type: Fuel Injector O-ring Kit
  • item weight: 0.0500
  • manufacturer warranty: 1 Year
  • item width: 4.000
  • item height: 0.120
  • item length: 6.000
  • ipn: C785 60-31
  • placement on vehicle: Air Fuel Delivery Service Kits
  • compatible model: Savana 3500
  • compatible year: 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004
  • core charge: Free No Core Charge
  • position: Lower
  • fitment type: Direct Replacement
  • bundle description: 1 Pc Genuine Fel-pro Fuel Injector O-ring Kit

returns carfuelinjector:

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

shipping carfuelinjector:

  • transit: 3-6 Days
  • class: Standard, Expedited
  • service: Standard, Expedited
  • cost: $0.00
  • type: Fixed

offer carfuelinjector:

  • options: Ship-to-home
  • availability: In Stock
  • started: April 23, 2026
  • quantity: 3
  • sold: 0

payments carfuelinjector:

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

general carfuelinjector:

  • condition: New
  • Air Fuel Delivery > Fuel Injection Parts > Fuel Injectors

seller carfuelinjector:

  • rating: 99.6%
  • city: Indianapolis, Indiana
  • # reviews: 648346
for makes: gmc, for years: 2001-2016, type: fuel injector o-ring kit, item weight: 0.0500, manufacturer warranty: 1 year, item width: 4.000, item height: 0.120, item length: 6.000, placement on vehicle: air fuel delivery service kits, compatible model: savana 3500, compatible year: 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004, core charge: free no core charge, position: lower, fitment type: direct replacement, bundle description: 1 pc genuine fel-pro fuel injector o-ring kit,
category: auto parts > air fuel delivery > fuel injection parts > fuel injectors, sku: 16048604184528721,
Fel-pro SX-6339 Is Similar To:
carfuelinjector logo
5 offers $21.22–$91.81 USD
  • New. Offer #1 priced at $21.22 + $0.00 shipping estimate = $21.22* total. FREE SHIPPING
  • New. Offer #2 priced at $91.81 + $0.00 shipping estimate = $91.81* total. FREE SHIPPING
  • New. Offer #3 priced at $23.77 + $0.00 shipping estimate = $23.77* total. FREE SHIPPING
  • New. Offer #4 priced at $37.32 + $0.00 shipping estimate = $37.32* total. FREE SHIPPING
  • New. Offer #5 priced at $29.24 + $0.00 shipping estimate = $29.24* total. FREE SHIPPING

Copyright © carfuelinjector.com