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Home›Repair guides›To replace the filter use the following steps:

General Motors — To replace the filter use the following steps:

A General Motors service procedure — check it applies to your exact model before use.

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Procedure

  1. Move the equipment to a well ventilated area and insure all external ignition sources are not present.
  2. Start the engine.
  3. With the engine running close the manual valve.
  4. When the engine runs out of fuel turn OFF the key when the engine stops and disconnect the battery negative cable. IMPORTANT: A small amount of fuel may still be present in the fuel line, use gloves to prevent burns, wear proper eye protection. If liquid fuels continues to flow from the connections when loosened check to make sure the manual valve is fully closed.
  5. Slowly loosen the inlet fitting and disconnect.
  6. Slowly loosen the outlet fitting and disconnect.
  7. Remove the filter housing form the equipment.
  8. Check for contamination.
  9. Tap the opening of the filter on a clean cloth.
  10. Check for debris.
  11. Check canister for proper mounting direction.
  12. Reinstall the filter housing to the equipment.
  13. Tighten the inlet and outlet fittings to specification.
  14. Open the manual valve. IMPORTANT: The fuel cylinder manual valve contains an “Excess Flow Check Valve” open the manual valve slowly to prevent activating the “Excess Flow Check Valve”.
  15. Check for leaks at the inlet and outlet fittings, and the filter housing end connection using a soapy solution or an electronic leak detector, if leaks are detected make repairs. LOW PRESSURE REGULATOR MAINTENANCE AND INSPECTION IMPORTANT: The Low Pressure Regulator (LPR) components have been specifically designed and calibrated to meet the fuel system requirements of the emission certified engine. The regulator should not be disassembled or rebuilt. If the LPR fails to operate or develops a leak the LPR should be replaced with the OEM recommended replacement parts. When inspecting the regulator check for the following items: • Check for any fuel leaks at the inlet and outlet fittings. • Check for any fuel leaks in the regulator body. • Check the inlet and outlet fittings of the coolant supply lines for water leaks. • Check the coolant supply lines for hardening, cracking, chaffing or splits. If any of these conditions exist replace coolant lines. • Check coolant supply hose clamp connections, ensure they are tight. • Check the to ensure the Pressure Trim Valve

Source: manual:OM56041564 - GM Maintenance Manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.