GMC Sierra 2008 Workshop Manual Electrical PDF

Electrical Manual – 2008 Light Duty Full Size C/K Trucks
ELECTRICAL MANUAL 2008 LIGHT DUTY FULL SIZE C/K TRUCKS
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PAGE
Index
OVERVIEW
Body Control System Description and Operation ...............................................................................................................................A-1
Power Mode Master ............................................................................................................................................................................A-1
Serial Data Gateway ............................................................................................................................................................................A-1
Body Control Module ..........................................................................................................................................................................A-2
DATALINK COMMUNICATIONS DESCRIPTION AND OPERATION ......................................................................................................A-3
Circuit Description ...............................................................................................................................................................................A-3
GMLAN High-Speed Circuit Description .............................................................................................................................................A-3
Low-Speed Circuit Description .............................................................................................................................................A-4
I/P Splice .............................................................................................................................................................................................A-4
Body Splice ........................................................................................................................................................................................A-5
Serial Data Reference ..........................................................................................................................................................................A-5
ELECTRIC POWER MANAGEMENT – DESCRIPTION AND OPERATION ............................................................................................A-6
Electric Power Management ...............................................................................................................................................................A-6
Power Mode – Description and Operation ..........................................................................................................................................A-7
Serial Data Power Mode Master .................................................................................................................................................A-7
Relay-Controlled Power Mode ....................................................................................................................................................A-7
BCM Awake/Sleep Modes ..........................................................................................................................................................A-8
Retained Accessory Power (RAP) – Description and Operation ........................................................................................................A-9
Serial Data Control of Retained Accessory Power (RAP) ...........................................................................................................A-9
Relay Control of Retained Accessory Power (RAP) ....................................................................................................................A-9
POWER TAKE-OFF (PTO) – BULLETIN #79 (Condensed Version) ..................................................................................................... A-10
See this document at: http://www.gmupfitter.com/publicat/bull/52993_UpfitBlltn79_D4.pdf
POWER TAKE-OFF (PTO) – BULLETIN #80 (Full Version) ....................................................................................................................A-11
See this document at: http://www.gmupfitter.com/publicat/bull/63135_PTO_Bulletin_80_D8.pdf
POWER TAKE-OFF (PTO) – FAST IDLE (UF3) OVERVIEW – BULLETIN #82 ......................................................................................A-12
See this document at: http://www.gmupfitter.com/publicat/bull/63135_FastIdle_UI_82_D3.pdf