Removal Procedure

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Remove the oil pump. Refer to Oil Pump, Screen, and Crankshaft Oil Deflector Replacement .
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CAUTION:
Refer to Fastener Caution .

Rotate the crankshaft sprocket until the camshaft position (CMP) actuator alignment mark (1) and the crankshaft sprocket alignment mark (2) are aligned.
Install the J 42386-A tool and tighten.
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Remove and discard the CMP actuator solenoid valve (234).
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Loosen and separate the CMP actuator and timing chain from the camshaft. Position your fingers behind the actuator sprocket and pull the actuator away from the front of the camshaft. Never pull on the reluctor wheel when attempting to remove the actuator.
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CAUTION:
Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the valves.

Remove the CMP actuator (235) and timing chain (208).
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Insert and secure a tie strap (1) through the center of the actuator and over the reluctor wheel.
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Remove the timing chain tension bolts (231) and tensioner (232).
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Using the J 41816-2 protector (1), the J 41558 remover (2), bolts (3) and the J 8433 puller (4) in order to remove the crankshaft sprocket.
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Remove the crankshaft sprocket (207).
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Remove the crankshaft sprocket key, if required.