Marks on Camshaft Gears 1 and 2 Align to the LEFT of J 42069-20

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Fig 1: Identifying J 42069-20

Courtesy of GENERAL MOTORS CORP.

Use the J 42069-40 adjustment wrench to turn eccentric on the idler pulley COUNTERCLOCKWISE until the marks on the camshaft gears and on the J 42069-20 checking gage are in alignment, the high point of the idler pulley eccentric will be in approximately the 9 o'clock position.
Tighten: Tighten the timing belt idler pulley bolt, while holding the eccentric in place with the J 42069-40 adjustment wrench to prevent movement, to 40 N.m (30 lb ft).
Remove the J 42069-10 crankshaft locking tool and the J 42069-20 checking gage.
Turn the crankshaft in the engine rotational direction 2 revolutions with the J 42098 . See Special Tools and Equipment . Stop at 60 degrees BTDC.
Install the J 42069-10 crankshaft locking tool to the crankshaft drive gear with the knurled bolt.
Use the J 42098 to carefully turn the crankshaft until the lever of the J 42069-10 firmly contacts the water pump pulley flange. See Special Tools and Equipment .
Secure the moveable lever of the tool to the water pump pulley flange.
Install the J 42069-20 checking gage to camshaft gears 1 & 2.
Inspect the alignment of the marks on the camshaft gears in reference to the marks on the J 42069-20 checking gage.
Repeat the procedure again if the marks do not align.
If camshaft gears 1 and 2 are properly aligned, set the final timing belt tensioner as outlined in Timing Belt Tensioner Adjustment at the end of this procedure.