Manufacturer communication — 2006 GMC YUKON DENALI XL

• Applies to all brands and models, 2000 - 2021, with V6 or V8 push rod engines with roller rockers.

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  2000 - 2021 All All V6 or V8 push rod engines with roller rockers

• Needle bearings may be 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. 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. Replace only the broken roller rocker arm; the remaining roller rocker arms need not be replaced.

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   If a damaged rocker arm is found, only replace the broken roller rocker arm. Replacement of the remaining roller rocker arms is not necessary.

2. Needle bearings may also be in the cylinder head oil drains; clean the oil drains to retrieve them.

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   During the repair needle bearings may also be found in cylinder head oil drains. Be sure to clean the oil drains to retrieve the needle bearings that can be found.

Caution

• The oil pan does not need to be removed: the needle bearing is larger than the oil pump pickup screen mesh and cannot be pulled into the oil pump.

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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.