General Motors 8.1 — Fuel Injector Replacement
Repair & overhaul
For the General Motors 8.1, from the General Motors service manual.
Applies to: General Motors 8.1L engine
Before you start
- The engine oil may be contaminated with fuel if the fuel injectors are leaking.
Procedure
- Remove the fuel rail assembly.
- Remove the injector retainer clip.
- Insert the fork of J 43013 between the fuel rail pod and the retaining clip ledges to pry the injector out.
- Discard the injector retainer clip.
- Remove and discard the injector O-ring seals from both ends of the injector.
- Lubricate the new O-ring seals with clean engine oil.
- Install the new injector O-ring seals on the injector.
- Install a new retainer clip on the injector.
- Push the fuel injector into the fuel rail injector socket with the electrical connector facing outwards.
- Install the fuel rail assembly.
Tools required
- J 43013 Fuel Injector Assembly Removal Tool Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.