GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C Sierra - 2WD 🢒 Body and Accessories 🢒 Doors 🢒 Outside Rearview Mirror Schematics
Figure 1:

Cell 147: Power Mirror Switch, LH and RH Outside Power Mirror, G203
Object Number: 301324 Size: FS
Power Door Systems Components
Outside Mirrors Circuit Description
Cell 147: RR Defog Relay, HVAC Control Module, LH and RH Outside Power Mirror Heater, G200, G203
Cell 14: Full Feature Seat Heated/Memory Seat Switch, Light Bar Switch
Cell 14: Full Feature Seat Heated/Memory Seat Switch, Light Bar Switch
Cell 14: Full Feature Seat Heated/Memory Seat Switch, Light Bar Switch
Interior Lights Schematics
Cell 10: Underhood Bussed Electrical Center, Headlamp Dimmer Switch
Cell 130: Right Bussed Electrical Center, LH Power Door Lock Actuator(Up Level)
Outside Mirrors Schematics
Figure 2:

Cell 147: RR Defog Relay, HVAC Control Module, LH and RH Outside Power Mirror Heater, G200, G203
Object Number: 301325 Size: FS
Power Door Systems Components
Outside Mirrors Circuit Description
Cell 147: Power Mirror Switch, LH, RH Outside Power Mirror, G203
Handling ESD Sensitive Parts Notice
Cell 14: Full Feature Seat Heated/Memory Seat Switch, Light Bar Switch
Cell 14: Full Feature Seat Heated/Memory Seat Switch, Light Bar Switch
Cell 14: Full Feature Seat Heated/Memory Seat Switch, Light Bar Switch
Cell 14: Full Feature Seat Heated/Memory Seat Switch, Light Bar Switch
Cell 14: Full Feature Seat Heated/Memory Seat Switch, Light Bar Switch