Vent Hose
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, 2003 Chevrolet Cab & Chassis Silverado, and 2002 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.
If equipped with a vent hose, remove vent hose clamp bolt and clamp from rear cover, then reinstall the bolt finger-tight. Remove hose clamp from top of main housing and remove vent hose, elbow, and breather adapter. See Fig 1.