GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2005 🢒 H2 🢒 Vehicle Control Systems 🢒 Computer/Integrating Systems 🢒 SIR Schematics
Figure 1:

Power, Grounding, Serial Data, and Sensors
Object Number: 1507075 Size: FS
Master Electrical Component List
SIR System Description and Operation
Passenger Air Bag and Defeat Switch
SIR Caution for Zoning
SEO IGN, SIR, and IGN E Fuses
Passenger Air Bag and Defeat Switch
SIR Schematic Icons
SIR Schematic Icons
SIR Schematic Icons
G302, G304, and G306
Splice Packs SP 206 and SP 207, and Dedicated TAC Serial Data Circuits
Figure 2:

Driver and Passenger Modules and Disable Switch
Object Number: 1507076 Size: FS
Master Electrical Component List
SIR System Description and Operation
SDM Power, Grounding, DLC, Sensors, and Driver Air Bag
SIR Caution for Zoning
SDM Power, Grounding, DLC, Sensors, and Driver Air Bag
Roof Lamps
Illumination - Transfer Case Control, Ride Height Control, Inflatable Restraint Disable, and Rear Heated Seat Switches, PRNDL Lamps
CKT 1050: G203, S302, S303, S351, and S215
SIR Schematic Icons
SIR Schematic Icons