TSB's

Just Needs Grease

This bulletin applies to 2015-2017 Chevy City Express vans. Some customers may comment on a clicking noise originating from the front axle area during takeoff/acceleration. This may simply be due to a lack of grease on the hub bearing surface.

Remove the axle nut, push the axle back but do not fully remove the axle from the hub or transmission.

Apply a moderate amount of M77 grease to the entire front wheel hub bearing surface using P/N 19356508 ACDelco M-77 paste. Reinstall the front wheel bearing lock nut and cotter pin and verify the repair.

Remove the front hub cotter pin and lock nut. Push the axle inboard but do not separate it from the hub.
<p>Remove the front hub cotter pin and lock nut. Push the axle inboard but do not separate it from the hub.</p>

Apply M77 grease to the entire wheel bearing surface.
<p>Apply M77 grease to the entire wheel bearing surface.</p>

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