GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Acadia - 2WD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Data Communication Schematics
Figure 1:

Low Speed GMLAN
Object Number: 1843878 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Control Module References
High Speed GMLAN
AIRBAG, AMP, BATT 1, BCM, CNSTR/VENT, CSTY, DISPLAY, INADV/PWR/LED, INFOTAINMENT, MSM, POWER MOD, and RADIO Fuses
G301 2 of 2
G302 1 of 3
Data Communication Schematic Icons
Figure 2:

High Speed GMLAN
Object Number: 1843879 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Control Module References
Communication Enable
Low Speed GMLAN
Figure 3:

Communication Enable
Object Number: 1843880 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Control Module References
High Speed GMLAN