GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Optra - Mexico 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 SIR Schematics
Figure 1:

Single Stage SIR System
Object Number: 2159481 Size: FS
Figure 2:

Dual Stage SIR - 1 of 2
Object Number: 2159487 Size: FS
Figure 3:

Dual Stage SIR - 2 of 2
Object Number: 2159489 Size: FS