General Motors — Fuel Pump (Pump-in-Tank) Replacement
Repair & overhaul · Fuel Pump Module
From a General Motors service manual — check it applies to your exact model before use.
Before you start
- Replace the fuel pump module with the identical part number
- Fuel pressure must be relieved before servicing the fuel pump
Procedure
- Relieve fuel pressure
- Disconnect negative battery cable
- Disconnect fuel pump module electrical connector
- Disconnect supply and return fuel line fittings
- Disconnect fuel tank vent hose
- Remove fuel pump module
- Install fuel pump module
- Install fuel tank vent hose and supply and return fuel line fittings
- Connect fuel pump module electrical connector and negative battery cable
- Check for fuel leaks by cycling the ignition
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.