CTS RWD V6-3.6L (2008)
‹› If the fuel pressure decreases more than the specified value, replace the fuel pump.
4. Remove the J 37287 and CH-48027 . Refer to Fuel Pressure Gage Installation and Removal (LP1, LY7) (See: Fuel Pressure Gage Installation
and Removal (LY7) VIN 7 W/O Direct Fuel Injection) .
5. Operate the vehicle within the conditions of the customer concern while monitoring fuel related parameters with a scan tool.
‹› If the scan tool parameters indicate a lean condition, test/inspect for the following:
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Restricted fuel feed pipe
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Restricted fuel filter
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Restricted siphon jet pump
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Restricted transfer lines between fuel tanks
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Faulty fuel pressure regulator
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Poor connections at the harness connectors and ground circuits of the fuel pump
‹› If all components test normal and the scan tool parameters indicate a lean condition, replace the fuel pump.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble
Code Tests and Associated Procedures/Verification Tests and Procedures) after completing the diagnostic procedure.
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Primary Fuel Tank Module Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Tank Unit/Service and
Repair/Primary Fuel Tank Module Replacement)
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Fuel Injector and Fuel Rail Replacement (LP1, LY7) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Service and
Repair/Fuel Injector and Fuel Rail Replacement (LY7) VIN 7 W/O Direct Fuel Injection)
