For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra Denali 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, 6.0L and 6.2L 🢒 New Product Information

New Product Information for GMC Truck Sierra Denali 2007

The purpose of New Product Information is to highlight, or indicate, important product changes from the previous model year.

Changes may include 1 or more of the following items:

•	Torque values and/or fastener tightening strategies

•	Changed engine specifications

•	New sealants and/or adhesives

•	Disassembly and assembly procedure revisions

•	Engine mechanical diagnostic procedure revisions

•	New special tools required

•	A component comparison from the previous year

Changed Engine Specifications

A variety of specifications have been revised based on the new design LY2, LMG, LY5, LC9, LH6, L76, LY6, and L92 engines. Refer to Engine Mechanical Specifications .

Torque Values and/or Fastener Tightening Strategies

•	All fasteners and threaded holes on the LY2, LMG, LY5, LC9, LH6, L76, LY6, and L92 engines utilize metric threads.

•	Cylinder head, connecting rod, crankshaft balancer, camshaft sprocket, and main bearing cap bolts now apply a torque and angle tightening strategy.

•	Certain fasteners should not be used again. Bolts, studs, or other fasteners that must be replaced, will be called out in the specific service procedure.

•	For the LY2, LMG, LY5, LH6, and LC9 applications, the camshaft sprocket is now retained to the front of the camshaft using a single bolt design with a torque and angle tightening strategy. Refer to Fastener Tightening Specifications .

•	For the LY6, L76, and L92 applications, a camshaft position actuator is now retained to the front of the camshaft using a single bolt/valve design with a torque and angle tightening strategy. Refer to Fastener Tightening Specifications .

New Sealants and/or Adhesives

Sealers and adhesives, as required, are identified within the specific service procedures. Refer to Adhesives, Fluids, Lubricants, and Sealers .

Disassembly and Assembly Procedure Revisions

A variety of procedures have been revised based on the new design LY2, LMG, LY5, LC9, LH6, L76, LY6, and L92 engines.

Engine Mechanical Diagnostic Procedure Revisions

Diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system condition. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to Diagnostic Starting Point - Engine Mechanical .

New Special Tools Required

Timing belt tensioner retaining pin EN 46330 is used to retain the timing chain tensioner during the installation procedure.

A Component Comparison from the Previous Year

•	The 4.8L LR4 VIN V Gen 3 engine is replaced by the 4.8L LY2 VIN C Gen 4 engine. Refer to Engine Component Description .

•	The 5.3L LM7 VIN T, L33 VIN B, and L59 VIN Z Gen 3 engines are replaced by the 5.3L LH6 VIN M, LC9 VIN 3, LMG VIN 0, and LY5 VIN J Gen 4 engines. Refer to Engine Component Description .

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The 6.0L LQ4 VIN U and LQ9 VIN N Gen 3 engines are replaced by the 6.0L LY6 VIN K, 6.0L L76 VIN Y, and 6.2L L92 VIN 8 Gen 4 engines. All 3 applications include the camshaft position actuator control system. The L76 application also includes cylinder deactivation active fuel management. Refer to Engine Component Description , Cylinder Deactivation (Active Fuel Management) System Description , and Camshaft Position Actuator and Solenoid Valve Description .