Manufacturer communication — 2006 GMC YUKON DENALI XL

• Applies to 2015 and prior GM passenger cars and trucks with V6 or V8 pushrod engines equipped with roller rocker arms.

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  Models: 2015 and Prior GM Passenger Cars and Trucks with a V6 or V8 push rod engines with Equipped roller Rocker Arms,

• 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 rocker arms do not need to 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 or the oil pan; 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 or oil pan. Be sure to clean the oil drains to retrieve the needle bearings.

Caution

• The needle bearing is larger in diameter than the oil pump pickup screen mesh, so it cannot be drawn into the engine oil pump.

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  Please Note: 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.