General Motors 8.1 — In-Line Fuel Filter Replacement

Maintenance

For the General Motors 8.1, from the General Motors service manual.

Applies to: General Motors 8.1L engine

Procedure

1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure; refer to Fuel Pressure Relief Procedure.
3. Clean all fuel filter connections and surrounding areas.
4. Disconnect the threaded fittings from the filter.
5. Cap the fuel pipes to prevent contamination.
6. Slide the fuel filter from the bracket.
7. Inspect the fuel pipe O-rings and replace if necessary.
8. Slide the filter into the bracket.
9. Remove the caps from the fuel pipes.
10. Connect the threaded fittings to the fuel filter.
11. Connect the negative battery cable and inspect for leaks.

Source: General Motors service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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