2003 GMC Sierra 3500 Oil Cooler Line

You can install a new retaining ring into each quick connector fitting, hook one of the open ends of the retaining ring in one of the slots in the quick connector, rotate the retaining ring around the connector, snap the plastic cap onto the quick connect fitting, and inspect and fill the engine oil to the proper level.

The recommended bolt torque is 100 Nm (75 lb-ft).

You can install the oil cooler hose bracket bolt, the oil cooler hose adapter bolts, the differential carrier lower mounting bolt and nut, the differential carrier upper mounting bolt and nut, and the inner axle housing washers, and connect the engine oil cooler quick connect fittings.

You can disconnect the engine oil cooler quick connect fittings, remove the oil cooler hoses from the clip, place jack or utility stands, remove the front differential carrier shield, and the differential carrier upper mounting bolt and nut.

You can disengage the plastic caps from the quick connect fittings, rotate the retaining ring around the quick connector, remove the engine oil cooler line, clean all of the components in a suitable solvent, dry them with compressed air, and inspect the fittings, the connectors, the cooler lines, and the cooler for damage, distortion, or restriction.