Manufacturer communication — 2006 GMC YUKON DENALI XL

• 2011 and prior GM passenger cars and light duty trucks with an automatic transmission/transaxle, including Allison transmissions.

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  Models: 2011 and Prior GM Passenger Cars and Light Duty Trucks Equipped with Automatic Transmission/Transaxle including Allison® Transmissions

Steps to confirm (in the document’s order)

1. In flow mode the tool's electronic flow meter measures the flow capability of the ATF oil cooling system.

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   In the flow mode, an electronic flow meter is used to measure the flow capability of the ATF oil cooling system.

2. The required minimum flow rate depends on the supply oil temperature; take the specification from the flow rate chart in SI for the ATF temperature in the supply vessel.

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   The required minimum ATF oil flow rate reading is directly related to the supply oil temperature. Refer to the flow rate chart in SI for the oil flow rate specification based on the temperature of the ATF in the supply vessel.

3. Table 1 gives, for each transmission, the oil cooler feed connector (exiting the transmission) and then the oil cooler return connector (entering the transmission).

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   Direction of Fluid Flow in Oil Cooler Pipes at Transmission Transmission Oil Cooler Feed (Exiting Transmission) Oil Cooler Return (Entering Transmission)

4. 4L60-E row of the table: bottom connector, then top connector; each may require adapter J-35944-200.

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   4L60-E bottom connector (may require J- 35944-200) top connector (may require J-35944- 200)

5. 4L80-E row of the table: front connector, then rear connector; each may require adapter J-35944-200.

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   4L80-E front connector (may require J- 35944-200) rear connector (may require J- 35944-200)

Repair

1. Every labor operation that removes the transmission for an internal repair or torque converter replacement includes time to flow check and flush the transmission oil cooler system.

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   All Labor Operations that include removal of the transmission from the vehicle to perform an internal repair or torque converter replacement include labor time to flow check and flush the transmission oil cooler system.

2. A flow test and flush uses between 4.7-7.5 L (5-8 qts) of DEXRON VI transmission fluid.

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   Performing a transmission oil cooling system flow test and flush will use between 4.7-7.5 L (5-8 qts) of DEXRON®VI transmission fluid.

Caution

• Insufficient oil flow through the ATF oil cooling system will cause premature transmission failure.

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  Notice: Insufficient oil flow through the ATF oil cooling system will cause premature transmission failure.

• The oil in the supply vessel must be at 18°C (65°F) or more for the J-45096 to operate.

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  The temperature of the supply vessel oil must be 18°C (65°F) or greater for the J-45096 to operate.