GM Service Manual Online
For 1990-2009 cars only
  1. Clean the fuel system components with clean solvent.
  2. Notice: Contamination of foreign material in the fuel system can cause poor engine operation and cause severe engine damage.

  3. When handling fuel system components, follow these guidelines:
  4. • Keep all of the openings on the fuel injection pump capped at all times.
    • Do not allow any cleaning solvents to enter the fuel injection pump during cleaning.
    • Keep the injection nozzle openings capped at all times.
    • Clean the exterior of the nozzles only in cleaning solvent. Do not use a wire brush.
    • Blow out the inside of all fuel lines with compressed air after cleaning the fuel lines in solvent. Wear protective safety glasses.
  5. Inspect the injection lines for kinks or damaged fittings. Replace any damaged lines.
  6. Inspect the entire length of the injection line for wear from rubbing or where holding brackets or retaining clips were located.
  7. Inspect the holding brackets for cracking.
  8. Inspect the retaining clips and insulators for damage.