| Subject: | Revised Fuel Injector Diagnosis (w/J 39021 or w/Tech 2®) |
| Models: | 2007 Chevrolet Cobalt, HHR, Silverado |
| with 2.2L (VIN F - RPO L61) or 4.3L (VIN X - RPO LU3) Engine |
This bulletin is being issued to revise the Fuel Injector Diagnosis (w/J 39021 or w/Tech 2®) in the Engine Controls sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.
The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.
Please be advised that the Fuel Injector Balance Test with the Tech 2® is NOT available for the vehicles listed above. You must use the Fuel Injector Balance Test with special tool J 39021.
You may also use the Fuel Injector Diagnosis (w/CH-47976) procedure if you have access to the CH-47976 Active Fuel Injector Tester. Follow the on-screen instructions for connecting the CH-47976 Active Fuel Injector Tester to the subject vehicle.
