K 2500 Truck 4WD V8-379 6.2L DSL VIN J FI (1992)
Fuel Return Line: Service and Repair
Fuel Lines
Note: Fuel and vapor hoses and pipes are specially manufactured. It is important to use replacement hose or pipe meeting GM specifications. Hoses and
pipes not meeting GM specifications could cause early failure or failure to meet emission standards.
When replacing fuel feed and return pipes, always use welded steel tubing meeting GM specification 124M or its equivalent. The replacement pipe
must have the same type fittings as the original pipes to ensure the integrity of the connection.
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Never replace fuel pipe with copper or aluminum tubing
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Check and replace any damaged O-rings or washers
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Fuel pipes should be inspected occasionally for leaks, dents, or kinks
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Follow the same routing as the original pipe
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Pipes must be properly secured to the frame to prevent chafing. A minimum clearance of 6 mm (1/4 inch) must be maintained to prevent
contact and chafing.
