C Yukon 2WD V8-5.7L VIN R (1999)
15. Raise the vehicle.
16. Remove the following fasteners from the oil pan:
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Two nuts at the front of the engine.
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Eleven screws and three studs.
IMPORTANT: Do not remove the two nuts at the rear of the engine.
17. Lower the vehicle.
18. Remove the engine front cover. Refer to Engine Front Cover Replacement
19. Remove the crankshaft position sensor reluctor ring. Refer to Crankshaft Position (CKP) Reluctor Ring Replacement
20. Rotate the number one piston to Top Dead Center (TDC).
21. Align the timing marks on the camshaft and the crankshaft sprockets.
22. Remove the camshaft sprocket bolts.
23. Remove the camshaft sprocket and the timing chain. Refer to Timing Chain and Sprockets Replacement
24. Remove the camshaft retainer plate and bolts using a T-30 Torx socket.