4.3L, 4.8L, 5.3L & 6.0L

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Vacuum Hose Routing (4.3L, 4.8L, 5.3L & 6.0L)

Courtesy of GENERAL MOTORS CORP.