GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 TopKick C-Series (Crew) C6/C7/C8 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Stationary Windows Component Views
Figure 1:

Back Window (C49)
Object Number: 826827 Size: LF
(1)Rear Window Defogger Connector C2
(2)Center High Mounted Stoplamp (CHMSL)
(3)Rear Window Defogger Connector C1
(4)Rear Window Defogger Grid
(5)Body/Roof Harness
Figure 2:

Front Left of the I/P
Object Number: 1457104 Size: LF
(1)Instrument Panel Cluster (IPC)
(2)Radio
(3)HVAC Control Assembly
(4)Overdrive Defeat Switch (Allison® LCT)
(5)Headlamp Switch