DIESEL INJECTION NOZZLE REVISED NOZZLE TEST PROCEDURE

VEHICLES AFFECTED : ALL C,K,G LIGHT DUTY TRUCK MODELS WITH 6.2L V-8 DIESEL ENGINES.............. THE FOLLOWING REVISED INJECTION NOZZLE TEST PROCEDURES FOR SUBJECT ENGINE SHOULD BE USED INSTEAD OF THOSE SHOWN IN SECTION 6C6 OF THE LIGHT DUTY TRUCK SERVICE MANUAL... INJECTION NOZZLE NOZZLES USED IN CK MODELS AND G MODELS ARE DIFFERENT AND ARE NOT INTERCHANGEABLE. REMOVAL 1. DISCONNECT BATTERIES. 2. DISCONNECT FUEL LINE CLIP 3. REMOVE FUEL RETURN HOSE 4. REMOVE FUEL INJECTION LINE A PREVIOUSLY OUTLINED 5. REMOVE INJECTION NOZZLE USING TOOL J-29873 WHENEVER POSSIBLE. NOTICE: WHEN REMOVING AN INJECTION NOZZLE, USE TOOL J-29873. BE SURE TO REMOVE THE NOZZLE USING THE 30 MM HEX. FAILURE TO DO SO WILL RESULT IN DAMAGE TO THE INJECTION NOZZLE. ALWAYS CAP THE NOZZLE AND LINES TO PREVENT DAMAGE AND CONTAMINATION. TESTING TEST IS COMPRISED OF THE FOLLOWING CHECKS: NOZZLE OPENING PRESSURE CHATTER LEAKAGE SPRAY PATTERN EACH TEST SHOULD BE CONSIDERED A UNIQUE TEST... (SEE BULLETIN)

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.