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Fig. 19: Identifying Black Supply Hose & Clear Waste Hose 1. Disconnect the supply and waste hoses from the vehicle cooler lines. Reverse the supply and waste hoses to provide a normal flow direction.
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 20: Setting Main Function Switch To FLUSH Position 2. Turn the main function switch to the FLUSH position and allow machine to operate for 30 seconds. FLOW TEST
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 21: Setting Main Function Switch To FLOW Position 1. Turn the main function switch to the FLOW position and allow the oil to flow for 15 seconds. Observe and note the flow rate; this is the TESTED flow rate. 2. Compare the TESTED flow rate to the MINIMUM flow rate information previously recorded. If the TESTED flow rate is equal to or greater than the MINIMUM flow rate IMPORTANT: If the flow rate is less than 0.5 gpm, the LCD displays an error message. Refer to the Troubleshooting section of the
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Procedure. If the TESTED flow rate is less than the MINIMUM flow rate previously recorded, 3. If the TESTED flow rate is less than the MINIMUM flow rate after the second test, perform Code Recording Procedure. 1. Replace the transmission oil cooler. 2. Reconnect supply and waste hoses to the cooler lines in the normal flow direction. Perform Flow Test. 3. Perform Code Recording Procedure. CODE RECORDING PROCEDURE Fig. 22: Setting Main Function Switch To CODE Position
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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