Diagnostic Aids
WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- The Auxiliary Transmission Fluid Pump Relay can be controlled using a Scan Tool. This feature is located in the Transmission Output Controls on the scan tool.
- Inspect for restricted Auxiliary Transmission Fluid Pump pickup filter.
- Inspect for leaking at the Auxiliary Transmission Fluid Pump mounting surface.
- Inspect charging system and battery voltage for correct operation.
- Ensure all Engine Idle Off enabling criteria have been met to ensure auxiliary transmission fluid pump operation is possible.
- For an intermittent condition, refer to Intermittent Conditions in Engine Controls - 4.8L, 5.3L and 6.0L.