GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Astro - 4WD 🢒 Body 🢒 Instrument Panel, Gages, and Console 🢒 Audible Warnings Schematics
Figure 1:

Power, Seat Belt/Ignition Key Alarm/Door Jamb Switches
Object Number: 539383 Size: FS
Master Electrical Component List
Audible Warnings Description and Operation
Turn Signal Switch, Vehicle Speed Signal
B+ Bus
CTSY, PK LPS, PWR ADJ MIRR, and TBC Fuses
CTSY, PK LPS, PWR ADJ MIRR, and TBC Fuses
Turn Indicators, Front Park/Turn Signal Lamps, Repeater Lamps
Turn Indicators, Front Marker Lamps, Front Park/Turn Signal Lamp
G301, G303, G400, and G404
G110 - Page 1 of 2
Figure 2:

Turn Signal Switch, Vehicle Speed Signal
Object Number: 539390 Size: FS
Master Electrical Component List
Audible Warnings Description and Operation
Power, Seat Belt/Ignition Key Alarm/Door Jamb Switches
Turn Signal Switch, and Turn Signal/Hazard Flasher Module
Turn Signal Switch, and Turn Signal/Hazard Flasher Module
Turn Indicators, Front Marker Lamps, Front Park/Turn Signal Lamp
Turn Indicators, Front Park/Turn Signal Lamps, Repeater Lamps
Gages