2004 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE

Fuel Rail Assembly

The fuel rail assembly attaches to the engine intake manifold. The fuel rail assembly performs the following functions:

  • Positions the injectors in the intake manifold
  • Distributes fuel evenly to the injectors
  • Integrates the fuel pressure regulator with the fuel metering system
  • Fig 1: Fuel Rail Exploded View
    GM537319Courtesy of GENERAL MOTORS CORP.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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