Lisle Low Profile Fuel Line Disconnect Set 3/8" & 5/16" Adapters — Slim Reach for Tight Engine Bays

Lisle 34750 is a compact fuel line disconnect set designed to release quick-connect fuel fittings in cramped engine bays and tight chassis spaces.

When you need to separate fuel lines without fighting for access, this low-profile set gives you the reach and shape to disengage stubborn quick-connect fittings on a wide range of vehicles. The kit includes both 3/8" and 5/16" adapters so you can work across common GM, Ford and Chrysler applications without modifying the fuel line or connector.

Which vehicles and fittings will this set work on?

The Lisle 34750 set covers many late-model domestic vehicles that use compressed quick-connect fuel fittings. The 3/8" adapter is made to fit GM applications like 5.3L Suburban, Tahoe, Yukon, Avalanche and selected Silverado/Sierra models, while the 5/16" adapter addresses many Ford and Chrysler fuel line connections.

• 3/8" adapter: fits select GM quick-connect fuel fittings (5.3L Suburban, Tahoe, Yukon, Avalanche, some Silverado/Sierra).
• 5/16" adapter: fits common Ford and Chrysler quick-disconnect fuel line fittings.
• Low-profile shape: reaches connectors tucked behind brackets or inside tight engine compartments.
• No cutting or permanent modification required: designed to release the retainer ring cleanly.

How does the low-profile design help in tight spaces?

The tool’s slim form allows you to access connectors where bulkier disconnect tools or pliers won’t fit. Because it slides into narrow clearances and engages the retainer ring directly, you can release fittings without bending or stressing the fuel line.

• Slim profile fits between hoses, brackets and chassis panels.
• Direct engagement of the retainer avoids line crimping or damage.
• Reduces time spent disassembling surrounding components for access.
• Durable construction withstands repeated use in service bays.

What are the basic steps for using this disconnect set?

Using the Lisle 34750 is straightforward: locate the quick-connect fitting, select the matching adapter size, insert the tool to depress the internal retainer, and pull the fuel line apart. Always relieve fuel system pressure and follow safety practices before working on fuel fittings.

• Relieve fuel pressure and protect against fuel spray.
• Choose the correct adapter (3/8" for designated GM lines; 5/16" for many Ford/Chrysler lines).
• Insert until the retainer is depressed, then separate the fitting with steady pull.
• Inspect seals and reassemble or replace as needed.

What are the kit dimensions and packaging details?

The Lisle 34750 ships in a slim, service-bay-friendly package that’s easy to store on a tool board or in a drawer. The compact footprint keeps the adapters organized and ready for use whenever you’re tackling fuel-system repairs or routine maintenance.

• Package dimensions: 2.88" width × 10.5" height × 0.75" depth.
• Includes both 3/8" and 5/16" low-profile adapters for cross-brand coverage.
• Compact packaging ideal for racks, pegboards, or toolbox storage.
• Lightweight and easy to carry between job sites or bays.

Who is this for: The Lisle 34750 Low Profile Fuel Line Disconnect Set is built for professional technicians, independent mechanics and knowledgeable DIYers who regularly service domestic vehicles with quick-connect fuel fittings. If you need a small, durable tool that saves time and avoids needless disassembly when separating fuel lines on GM, Ford or Chrysler models, this set is a practical addition to your toolbox.