C 1500 Yukon 2WD V8-5.3L VIN Z Flex Fuel (2003)
Push Rod: Specifications
Rotate the crankshaft until the number one piston is at Top Dead Center (TDC) of the compression stroke.
In this position. cylinder number one rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position.
The engine firing order is 1, 8, 7, 2, 6, 5, 4, 3.
Cylinders 1, 3, 5 and 7 are the left bank
Cylinder 2, 4, 6 and 8 are the right bank
With the engine in the number one firing position tighten the following rocker arm bolts:
Tighten cylinders 1, 2, 7 and 8 exhaust valve rocker arm bolts to 30 Nm (22 ft. lbs.)
Tighten cylinders 1,3,4 and 5 intake valve rocker arm bolts to 30 Nm (22 ft. lbs.)
Rotate the crankshaft 360 degrees.
Tighten the following rocker arm bolts:
Tighten cylinders 3, 4, 5 and 6 exhaust valve rocker arm bolts to 30 Nm (22 ft. lbs.)
Tighten cylinders 2, 6, 7 and 8 intake valve rocker arm bolts to 30 Nm (22 ft. lbs.)