Bulletin 06-06-04-001 is being released to cover 2005-06 Chevrolet Impala, Monte Carlo, TrailBlazer, GMC Envoy and Pontiac Grand Prix with 5.3L Active Fuel Management (AFM) Engine (RPO LH6 or LS4).
The customer may comment that the SES light is on, but no other driveability or performance concerns are reported.
The most likely cause is that the fuel injector connectors are crossed or incorrectly installed. For example, the number 6 fuel injector connector may be plugged into the number 8 fuel injector and vice versa.
Refer to the bulletin for details. Here are some highlights.
Begin by using a scan tool to check for DTC(s) and write them down.
IMPORTANT:Â Do not assume that the fuel injector connectors are properly installed on the correct fuel injectors from the factory.
Use the appropriate SI fuel injector schematic to verify that the fuel injector connectors are installed on the correct fuel injectors. If necessary, install the fuel injector connectors correctly.
TIP:Â If you find that the fuel injector connectors are correctly installed, refer to the appropriate SI document for diagnosis of the DTC(s) noted at the beginning.
Finally, road test the vehicle at steady highway speeds, allowing the vehicle to go into AFM to verify the repair.
- Thanks to Tom Smith
The customer may comment that the SES light is on, but no other driveability or performance concerns are reported.
The most likely cause is that the fuel injector connectors are crossed or incorrectly installed. For example, the number 6 fuel injector connector may be plugged into the number 8 fuel injector and vice versa.
Refer to the bulletin for details. Here are some highlights.
Begin by using a scan tool to check for DTC(s) and write them down.
IMPORTANT:Â Do not assume that the fuel injector connectors are properly installed on the correct fuel injectors from the factory.
Use the appropriate SI fuel injector schematic to verify that the fuel injector connectors are installed on the correct fuel injectors. If necessary, install the fuel injector connectors correctly.
TIP:Â If you find that the fuel injector connectors are correctly installed, refer to the appropriate SI document for diagnosis of the DTC(s) noted at the beginning.
Finally, road test the vehicle at steady highway speeds, allowing the vehicle to go into AFM to verify the repair.
- Thanks to Tom Smith
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