For this job, you’ll need a fuel injector cleaning kit, fuel injector cleaner, a wrench/socket set, an air compressor, and, since this requires using chemicals under pressure, be sure to wear ...

The owner keeps it well maintained, but his concern about the longevity of the 6.6L Duramax LML engine’s CP4.2 high-pressure fuel-injection pump ... failures of the Bosch CP4.2 pump are well ...