GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Engine Controls Schematics
Figure 1:

Module Power, Ground, Serial Data, and MIL
Object Number: 2076264 Size: FS
Figure 2:

Engine Data Sensors - 5-Volt and Low Reference
Object Number: 2076266 Size: FS
Figure 3:

Fuse Block - Underhood and IGN-A Relay
Object Number: 2076267 Size: FS
Figure 4:

Engine Data Sensors - VSS
Object Number: 2076269 Size: FS
Figure 5:

Engine Data Sensors - HO2S
Object Number: 2076271 Size: FS
Figure 6:

Engine Data Sensors - Electronic Throttle Controls
Object Number: 2076272 Size: FS
Figure 7:

Ignition Controls - Ignition Systems 1 of 2
Object Number: 2076274 Size: FS
Figure 8:

Ignition Controls - Ignition Systems 2 of 2
Object Number: 2076275 Size: FS
Figure 9:

Ignition System - CKP, CMP, and KS Sensors
Object Number: 2076276 Size: FS
Figure 10:

Fuel Controls - Fuel Pump Controls
Object Number: 2076277 Size: FS
Figure 11:

Fuel Controls - Fuel Injectors
Object Number: 2076278 Size: FS
Figure 12:

Device Controls - EGR Valve
Object Number: 2076279 Size: FS
Figure 13:

Controlled/Monitored Subsystem References
Object Number: 2076280 Size: FS