1. Disconnect the battery negative cable from the battery. Refer to Battery Cable Replacement in Engine Electrical.



2. Remove the CDR (Crankcase Depression Regulator) from the right valve rocker arm cover.



3. Remove the braces from the turbocharger and the upper and lower intake manifold.

Important: Some quantity of oil will exist inside the vent system. The crankcase vapor consist of vaporized oil that condenses within the vent and intake system. The inside of the air duct and compressor wheel housing will have some oil due to the venting of the crankcase vapors.

4. Loosen the clamps on the hose between the air cleaner assembly and the turbocharger.

Important: Silicone sealant is used on the hose between the upper intake manifold and the turbocharger.

5. Remove the hose between the upper intake manifold and the turbocharger assembly.
6. Remove the vacuum line from the wastegate actuator.



7. Remove the oil feed line from the turbocharger and position to the side.
8. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
9. Remove the exhaust pipe from the turbocharger. Refer to Exhaust Pipe Replacement (Crossover) in Engine Exhaust.



10. Remove the bolts from the oil return pipe.
11. Remove the oil return line from the turbocharger.



12. Remove the turbocharger mounting nuts from the exhaust manifold.
13. Lower the vehicle.
14. Remove the turbocharger and gasket from the exhaust manifold.
15. Clean and inspect the sealing surface of the exhaust manifold. Refer to Exhaust Manifold Clean and Inspect .

Important: Check and make sure that the intake and exhaust systems leading to and from the turbocharger do not have any foreign material that may cause damage to the turbocharger during all levels of operation. At the same time, check and make sure that all sealing and mating surfaces are clean and no damage exist. If any damage is found, replace the damaged part.

1. Install the turbocharger and the gasket on the exhaust manifold.
2. Apply a small amount of high temperature anti seize compound, GM P/N 1052771 on all the threaded fasteners for the turbocharger.
3. Raise the vehicle.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install the turbocharger nuts to the exhaust manifold.

Tighten
Tighten the nuts to 58 N·m (43 lb ft)




5. Install the oil return pipe and gasket to the base of the turbocharger.
6. Install the oil return pipe bolts to the turbocharger.

Tighten
Tighten the bolts to 26 N·m (19 lb ft)

7. Install the oil return pipe with the hose and clamps to the engine block.
8. Install the exhaust pipe to the turbocharger. Refer to Exhaust Pipe Replacement (Crossover) in Engine Exhaust.
9. Lower the vehicle.




Important: Before installing the oil feed line on the turbocharger, pour a small amount of clean engine oil (1 to 2 cc) into the oil feed hole while turning the compressor wheel by hand to lubricate the bearings in the turbocharger.

10. Install the oil feed line to the turbocharger.

Tighten
Tighten the fitting to 28 N·m (21 lb ft).





Important: Apply a small amount of silicone sealant, GM P/N 9985943 or equivalent, to a clean turbocharger compressor inlet and the upper intake manifold. This is done to prevent to prevent oil leakage from the closed breather system.

11. Install the hose with clamps between the turbocharger and the upper intake manifold:
12. Center the hose and tighten the clamps.

Tighten
Tighten the hose clamps to 6 N·m (50 lb in).




13. Install the long and the short turbocharger braces.

Tighten
Tighten the long turbocharger brace nut to 34 N·m (26 lb ft).

•	Tighten the long turbocharger brace bolt to 50 N·m (37 lb ft).

•	Tighten the short turbocharger brace bolts to 25 N·m (19 lb ft).




14. Install the CDR valve to the right valve rocker arm cover.
15. Install the vacuum line to the wastegate actuator.
16. Install the air inlet duct to the turbocharger assembly.

Important: Start and run the engine at an idle for at least 2 minutes after completing the installation of the turbocharger. While running the engine, check for any oil leaks at the oil feed or return line and repair as necessary.

17. Connect the battery negative cable. Refer to Battery Cable Replacement in Engine Electrical.