To keep fuel systems clean, TOP TIER detergent gasoline is recommended. See Fuel (Gasoline).
If TOP TIER detergent gasoline is not available, one bottle of GM Fuel System Treatment Cleaner added to the fuel tank at every engine oil change, can help. GM Fuel System Treatment Cleaner is the only gasoline additive recommended by General Motors. It is available at your dealer.
California Fuel Requirements
(Gasoline)
Fuel for Diesel Engines#02-07-30-029U: Product Quality Center (PQC) Assembly Replacement Process - (Jul 16, 2013)
Subject:Product Quality Center (PQC) Assembly Replacement ProcessModels: 2014 and Prior GM Cars and Light Duty TrucksEquipped with CNG, LPG or Gasoline Engine, Duramax™ Diesel Engine, Automatic or ManualTransmission and/or Transfer Case, Including Front Wheel Drive and Rear Wheel DriveVehiclesThi ...