LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2003 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Removal & Installation >> Fuel Systems >> Fuel Rail Assembly >> Installation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel Rail Assembly: Installation

  1. On models equipped with gasoline-only 5.3L (RPO code LM7), coat NEW crossover pipe "O" ring with clean engine oil. Loosely install crossover pipe to right fuel rail. On all models, coat NEW upper injector "O" rings with clean engine oil. Install injector(s) into fuel rail. Install injector retainer(s). Ensure injector(s) rotate smoothly and freely. If "O" rings are installed incorrectly, injectors will bind.
  2. Coat NEW lower injector "O" rings with clean engine oil. Install fuel rail. Apply a small amount of Threadlock (12345382) to threads on fuel rail retaining bolts. Install fuel rail retaining bolts and tighten to specification. See TORQUE SPECIFICATIONS . Tighten crossover pipe-to-right fuel rail retainer screw. Rotate injectors as necessary in order to avoid stretching of injector harness.
  3. To complete installation, reverse removal procedure. Turn ignition switch to ON position for 2 seconds. Turn ignition switch to OFF position for 10 seconds. Turn ignition switch to ON position. Check for fuel leaks. Repair as necessary.


NOTE: When ordering new fuel injectors, ensure to order the correct injector(s) for the application being serviced.
  1. Lubricate "O" ring seals on NEW fuel injector(s) with clean engine oil. Install fuel injector(s) into fuel rail with injector electrical connector facing outwards. Install fuel injector retainer(s).
  2. Apply a small amount of Threadlock (12345382) to threads on fuel rail mounting bolts. Install fuel rail. Tighten fasteners to specification. See TORQUE SPECIFICATIONS . Rotate injectors as necessary in order to avoid stretching of injector harness.
  3. To complete installation, reverse removal procedure. Turn ignition switch to ON position for 2 seconds. Turn ignition switch to OFF position for 10 seconds. Turn ignition switch to ON position. Check for fuel leaks. Repair as necessary.
scientia non olet · About LEMON Manuals