Cleaning 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.

Courtesy of GENERAL MOTORS COMPANY

NOTE:
Use care when handling the crankshaft. Avoid damage to the bearing surfaces or the lobes of the crankshaft position (CKP) reluctor ring. Damage to the teeth of the CKP reluctor ring may affect on-board diagnostics (OBD) II system performance.

Clean the crankshaft with solvent.
Thoroughly clean all oil passages (2) and inspect for restrictions or burrs.

WARNING:

Refer to Safety Glasses Warning .

Dry the crankshaft with compressed air.