Manufacturer communication — 2006 GMC YUKON DENALI XL

• All models, model years 2000 - 2019, with V6 or V8 push rod engines with roller rockers.

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  All All 2000 - 2019 All All V6 or V8 push rod engines with roller rockers All

• Needle bearings are found in the oil pan during an oil change.

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  Technician may find needle bearings in the oil pan during an oil change.

Steps to confirm (in the document’s order)

1. If roller rocker arm needle bearings are found during an oil change, inspect all the roller rocker arms.

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   If a dealer finds roller rocker arm needle bearings during an oil change, inspect all the roller rocker arms.

2. During the repair, needle bearings may also be found in the cylinder head oil drains.

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   During the repair needle bearings may also be found in cylinder head oil drains.

3. There should be 66 bearings, 33 a side.

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   There should be 66 bearings 33 a side, and again, replacement of the remaining roller rocker arms is not necessary.

Repair

1. If a damaged rocker arm is found, replace only the broken roller rocker arm.

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   If a damaged rocker arm is found, only replace the broken roller rocker arm.

2. Clean the oil drains to retrieve the needle bearings.

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   Be sure to clean the oil drains to retrieve the needle bearings that can be found.

Caution

• Replacing the remaining roller rocker arms is not necessary.

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  Replacement of the remaining roller rocker arms is not necessary.

• The needle bearing is larger in diameter than the oil pump pickup screen mesh and cannot be drawn into the oil pump, so the oil pan does not need to be removed.

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  The diameter of the needle bearing is larger than the oil pump pickup screen mesh preventing the needle bearing from being pulled into the engine oil pump, so the oil pan does not need to be removed.