Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fuel Hose/Pipes Assembly Replacement (Fuel Pipe Repair): Notes
Steel fuel lines-These are welded steel tubes, meeting GM specifications 124-M, or the equivalent. The fuel feed line is 9.5 mm (3/8 inches) diameter and the fuel return line is 8 mm (5/16 inches) diameter. Do not use copper or aluminum tubing to replace steel tubing. Those materials do not have satisfactory durability to withstand normal vehicle vibration.
Coupled hose-Do not repair the hoses. Replace them only as an assembly.
Uncoupled hose-Use only reinforced fuel resistant hose, made of Fluoroelastomer material. Do not use a hose within 100 mm (4 in) of any part of the exhaust system, or within 2154 mm (10 in) of the catalytic converter. The hoses inside diameter must match the outside diameter of the steel tubing.
Clamps-These are stainless steel, screw bank-type clamps, #2494772, or equivalent.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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