General Motors — Multivalve Replacement
A General Motors service procedure — check it applies to your exact model before use.
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Before you start
- Technicians working with, or around, fuel systems should be properly trained to utilize extreme care and caution at all times. Failure to exercise extreme caution and care may lead to serious accidents which can result in property damage, personal injury and/or death.
Procedure
- Using a light weight petroleum jelly or o-ring lube, lightly lubricate a new o-ring on the Multivalve.
- Place the Multivalve near the tank opening.
- Connect the electrical circuit to the 80% stop fill solenoid.
- Connect the electrical connector to the pressure switch.
- Insert the five electrical connector into the Multivalve connection and secure with the one (1) retaining screw.
- Reconnect the fuel pump hose to the Multivalve.
- Position the Multivalve to the tank.
- Install the ten (10) fasteners and tighten to specification; 5.0 Nm (4 lbs ft)
Tools required
- Petroleum jelly or o-ring lube
- Allen wrench
Specs & torque values
- New o-ring
- Torque specification: 5.0 Nm (4 lbs ft)
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.