Manufacturer communication — 2006 GMC YUKON DENALI XL

• Applies to 2003-2016 GM passenger cars and trucks.

  the passage

  2003-2016 GM Passenger Cars and Trucks

• The bulletin shows how to find engine and automatic transmission/transaxle identification information for OEM built, manufactured-for-GM and re-manufactured service engines.

  the passage

  The purpose of this bulletin is to show dealers and retailers how to find engine and automatic transmission/transaxle identification information for OEM built service engines, manufactured for GM service engines, and re-manufactured for GM service engines.

Steps to confirm (in the document’s order)

1. The engine bar code tag could be on a rocker arm cover, the ends of a cylinder head, or the oil pan or oil rail area of the engine.

   the passage

   The bar code tag could be on a rocker arm cover, the ends of a cylinder head or on the oil pan or the oil rail area of the engine.

2. Remanufactured 4.8L/5.3L/6.0L/6.2L (Gen III/Gen IV) engines carry their label on the left side of the block.

   the passage

   Left Side of Block • 2.2L/2.4L (Ecotec) • 4.8L/5.3L/6.0L/6.2L(Gen III/Gen IV)

Caution

• If piston replacement is required, measure the cylinder before ordering a piston: most of these engines have oversized cylinders and oversized piston ring packs are not available for service.

  the passage

  If piston replacement is required, be sure to measure the cylinder before ordering a piston. The majority of these engines have oversized cylinders and oversized pistons ring packs are not available for service.

• If crankshaft bearing replacement is required, measure the crankshaft first; a crankshaft that has been turned must be replaced along with all new standard size bearings.

  the passage

  If crankshaft bearing replacement is required, be sure to measure a crankshaft before ordering bearings. If the crankshaft has been turned, it will require replacement with all new standard size bearings and crankshaft.