Crankshaft Balancer Removal

On some 2019 CT6; 2019-2020 XT4, Silverado, Sierra; 2020 CT4, CT5, XT5, XT6, Blazer, and Acadia models equipped with the 2.0L engine (RPO LSY) or 2.7L engine (RPO L3B), the crankshaft sprocket may disengage from the crankshaft during crankshaft balancer removal.

Anytime that the crankshaft balancer (Fig. 10, #1) is removed for service, ensure that the crankshaft sprocket (Fig. 10, #2) is not sticking to the crankshaft balancer; otherwise, the sprocket will pull off the end of the crankshaft.

Fig. 10

To separate the crankshaft balancer from the crankshaft sprocket during service, first loosen the crankshaft balancer bolt a few turns and then strike the crankshaft balancer with a rubber mallet.

TIP: Do not rotate the crankshaft on these engines with the crankshaft balancer removed. The crankshaft balancer and bolt must be reinstalled to avoid damage to the crankshaft sprocket, crankshaft and valvetrain.

– Thanks to Raymond Haglund

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