General Motors — 80% Stop Fill Valve Solenoid Replacement
A General Motors service procedure — check it applies to your exact model before use.
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Before you start
- Solenoid will not be tight on the stem and is allowed to rotate freely.
Procedure
- Install the Solenoid to the valve assembly stem.
- Install the nut and tighten until the nut is snug.
- Connect the electrical connector, push the connector until it clicks, then pull on the connector to make sure it is locked.
- Reinstall the multivalve.
Source: manual:FuelSystem.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.