Removal and Replacement
Engine Replacement
Tools Required
^ J36857 Engine Lift Brackets
Removal Procedure
1. Open the hood.
2. Place fender covers over both fenders.
3. Raise the hood to the service position, perform the following:
1. Remove the hood hinge bolts (1).
2. Raise the hood until vertical.
3. Install the hood hinge bolts until snug in the service position (2).
4. Loosen the clamps at the throttle body and air cleaner.
5. Remove the air cleaner outlet duct.
6. Disconnect the battery negative cable.
7. Disconnect the positive battery cable.
8. Remove the ignition coils.
9. Relieve the fuel system pressure.
10. Disconnect the fuel feed pipe (1) from the fuel rail.
11. Remove the Air Conditioning (A/C) compressor.
12. Remove the radiator.
13. Disconnect the Throttle Actuator Control (TAC) module electrical connector (1).
14. Remove the vacuum lines from the engine, as required.
15. Remove the ground cable bolt at the engine block.
16. Remove the generator.
17. Remove the engine electrical harness and tie out of the way.
18. Raise and suitably support the vehicle safety stands.
19. Remove the starter motor.
20. Remove the hoses from the power steering pump.
21. Remove the exhaust manifold pipe.
22. Remove the catalytic converter.
23. Remove the torque converter bolts, if equipped.
24. Remove the clutch pressure plate bolts, if equipped.
25. Remove the bolts from the transmission to the engine.
^ For the automatic transmission, refer to Transmission Replacement in Automatic Transmission - 4L80-E or Transmission Replacement (With 6.6L Engine) Transmission Replacement (With 8.1L (L18) Engine) in Automatic Transmission - Allison.
^ For the manual transmission, refer to Transmission Replacement in Manual Transmission - NV 4500 or Transmission Replacement in Manual Transmission - ZF S6-650.
26. Remove the engine oil cooler lines from the engine block.
27. Attach J36857 to the rear of the right cylinder head and to the front of the left cylinder head.
Notice: Refer to Fastener Notice in Service Precautions.
28. Install the attaching bolt and washer. Use GM P/N 9428217 with GM P/N 15650963.
Tighten the lift bracket bolts to 40 Nm (30 ft. lbs.).
29. Remove the engine mount heat shield bolts and shields.
30. Remove the engine mount to engine mount bracket bolts.
31. Remove the engine using a suitable lifting devise.
32. Install the engine onto a suitable engine stand.
33. Remove the generator mounting bracket.
34. Remove the A/C compressor/power steering pump bracket from the cylinder head.
35. Remove the lift brackets from the cylinder head.
Installation Procedure
1. Attach J36857 to the rear of the right cylinder head and to the front of the left cylinder head.
Notice: Refer to Fastener Notice in Service Precautions.
2. Install the attaching bolt and washer. Use GM P/N 9428217 with GM P/N 15650963.
Tighten the lift bracket bolts to 40 Nm (30 ft. lbs.).
3. Install the air compressor/power steering mounting bracket to the engine block.
Tighten the power steering pump bracket bolts and nut to 50 Nm (37 ft. lbs.).
4. Install the generator bracket.
5. Remove the engine using a suitable lifting devise.
6. Install the engine into the vehicle.
7. Install the engine mount to engine mount bracket bolts.
8. Install the engine mount heat shield and bolts.
9. Remove the engine lift hooks from the cylinder heads.
10. Raise the vehicle and support with safety stands.
11. Install the engine oil cooler lines to the engine block.
12. Install the bolts from the transmission to the engine.
^ For the automatic transmission, refer to Transmission Replacement in Automatic Transmission - 4L80-E or Transmission Replacement (With 6.6L Engine) Transmission Replacement (With 8.1L (L18) Engine) in Automatic Transmission - Allison.
^ For the manual transmission, refer to Transmission Replacement in Manual Transmission - NV 4500 or Transmission Replacement in Manual Transmission - ZF S6-650.
13. Install the clutch pressure plate bolts, if equipped.
14. Install the torque converter bolts, if equipped.
15. Install the catalytic converter.
16. Install the exhaust manifold pipe.
17. Install the hoses to the power steering pump.
18. Install the starter motor.
19. Lower the vehicle.
20. Route the engine electrical harness.
21. Install the generator.
22. Install the ground cable bolt at the engine block.
Tighten the engine wiring harness bolt to 16 Nm (12 ft. lbs.).
23. Install the vacuum lines to the engine.
24. Connect the TAC module electrical connector (1).
25. Install the radiator.
26. Install the A/C compressor.
27. Connect the fuel feed pipe (1) to the fuel rail.
28. Install the ignition coils.
29. Connect the positive battery cable.
30. Connect the battery negative cable.
31. Install the air cleaner outlet duct.
32. Tighten the clamps at the throttle body and air cleaner.
Tighten the clamps to 4 Nm (35 inch lbs.).
33. Remove fender covers from both fenders.
34. Remove the hood hinge bolts from the service position (2).
35. Lower the hood to the normal position.
36. Install the hood hinge bolts.
Tighten the hood hinge bolts to 25 Nm (18 ft. lbs.).
37. Before starting a new engine or one that has been repaired, complete the following procedure.
1. Prelube the engine.
2. Remove the fuel pump fuse and disconnect the coil harness connectors, then crank the engine until oil pressure is present.
3. Crank the engine several times. Listen for any unusual noises or evidence that any of the parts are binding.
4. Install the fuel pump fuse and connect the coil harness connectors and start the engine and listen for unusual noises.
5. Check the vehicle oil pressure gauge or light and confirm that the engine has acceptable oil pressure. If necessary install an oil pressure gauge and measure the oil pressure.
6. Run the engine at about 1000 RPM until the engine has reached normal operating temperature.
7. Inspect for oil and or coolant leaks while the engine is running.
8. Stop the engine and perform a final inspection for the proper engine oil and coolant levels.
9. The final step is to perform the Crankshaft Position (CKP) sensor variation learn procedure.