General Motors — Fuel Injector Replacement
Repair & overhaul · PFI Fuel Injector
From a General Motors service manual — check it applies to your exact model before use.
Before you start
- Order the identical part number inscribed on the old injector
- Do not immerse the injector in any cleaner
Procedure
- Disconnect negative battery cable
- Relieve fuel pressure
- Remove fuel rail assembly
- Release injector clip by sliding off injector
- Remove PFI injector from rail
- Remove and discard injector O-ring seals from both ends
- Lubricate new injector O-ring seals with clean engine oil and install on injector
- Install new retainer clip onto injector
- Install PFI fuel injector assembly into fuel rail injector socket with electrical connector facing outward
- Rotate injector retainer clip to locking position
- Install fuel rail assembly and connect negative battery cable
- Turn ignition ON for 2 seconds, OFF for 10 seconds, ON and check for fuel 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.