POWER DISTRIBUTION – GMC Sierra 2500 1999 – SYSTEM WIRING DIAGRAMS

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 4) for GMC Sierra 2500 1999

List of elements for Power Distribution Wiring Diagram (1 of 4) for GMC Sierra 2500 1999:

• (4.3l)
• (base) (uplevel)
• (except 4.3l)
• (not used)
• (under left side of dash) mid bussed electrical center
• (upper left kick panel)
• A/c compressor relay
• A/c fuse 10a
• Abs maxifuse 60a
• Air maxi- fuse 30a
• Atc fuse 20a
• Automatic transfer case
• Automatic transfer case control module
• Aux pwr fuse 20a
• Auxiliary power outlet
• B12
• B12 d2
• Bat
• Battery cable junction block
• Blower motor resistor/ relay assembly
• Body control module
• C1 f2
• Cigar fuse 15a
• Cigar lighter
• Ctsy lp fuse 15a
• D11
• D12
• Data link connector (dlc)
• Daytime running lamp (drl) relay
• Drl fuse 10a
• E nca
• E10
• Ecm b fuse 20a
• Electronic brake control module (ebcm)
• F10
• F12
• Fog lps fuse 15a
• Foglamp relay
• From air maxifuse (diagram 1 of 4)
• From rap maxifuse (diagram 1 of 4)
• Frt hvac fuse 30a
• Fuel pump relay
• Full feature driver seat
• Full feature passenger seat
• Fusible link (10 ga- red)
• G200
• Generator
• Hazard fuse 20a
• Headlamp and panel dimmer switch
• Headlamp dimmer switch
• Headlamp relay
• Horn relay
• Inadvertent power relay
• Instrument cluster
• L nca
• Left battery
• Nca
• Park lamps fuse 30a
• Parklamp relay
• Radio
• Radio fuse 15a
• Rap maxifuse 50a
• Rdo amp fuse 15a
• Rear defogger relay
• Red
• Remote control door lock receiver
• Roof becon relay
• Roof becon switch
• Secondary air injection (air) pump relay
• Seo 1 fuse 15a
• Seo 2 fuse 30a
• Sp203
• Starter solenoid
• Stop lps fuse 20a
• Stoplamp switch
• Tbc fuse 10a
• To auxiliary battery relay (diagram 3 of 4)
• To ecm b fuse (diagram 1 of 4)
• To ign a maxifuse (diagram 2 of 4)
• To left bussed electrical center (mir/lock fuse) (diagram 4 of 4)
• To park lamps fuse (diagram 1 of 4)
• Turn/ hazard switch
• Underhood bussed electrical center (on left side of eng compt)
• Underhood bussed electrical center (on left side of engine compt)
• Vehicle control module (vcm)/ powertrain control module (pcm)

Power Distribution Wiring Diagram (2 of 4) for GMC Sierra 2500 1999

List of elements for Power Distribution Wiring Diagram (2 of 4) for GMC Sierra 2500 1999:

• (4.3l)
• (a/t)
• (all others)
• (m/t)
• (not used)
• A/c clutch relay
• A10
• A13
• Acc
• Air bag fuse 15a
• Automatic day-night rearview mirror (w/ compass)
• Automatic transfer case (atc) select switch
• Automatic transmission
• B/u lp fuse 25a
• B11
• Backup lamp switch
• Body control module
• Bulb test
• C10
• Camshaft position (cmp) sensor
• Cellular phone
• Crank fuse 10a
• Cruise control module
• Cruise control switch
• Cruise fuse 10a
• Drl relay
• E11
• Eng 1 fuse 10a
• Evaporative emission (evap) canister purge solenoid
• Evaporative emission (evap) vent solenoid
• Ext lps fuse 10a
• F10
• F11
• From cigar e
• Fuse (diagram 1 of 4)
• Heated oxygen sensor (ho2s) (bank 1 sensor 1)
• Heated oxygen sensor (ho2s) (bank 1 sensor 2)
• Heated oxygen sensor (ho2s) (bank 2 sensor 1)
• Heated oxygen sensor (ho2s) (bank 2 sensor 2)
• Ign 1 fuse 10a
• Ign a maxifuse 40a
• Ign b maxifuse 50a
• Ign c fuse 20a
• Ign e fuse 10a
• Ign o fuse 10a
• Ignition switch
• Inflatable restraint i/p module switch
• Inflatable restraint sensing and diagnostic module
• Instrument cluster
• Left bussed electrical center (on lower left side of dash)
• Mass airflow (maf) sensor
• Mid bussed electrical center (under left side of dash)
• Nca
• O2 a fuse 15a
• O2 b fuse 15a
• Off
• Park/ neutral position switch
• Pnk
• Rear defog relay
• Red
• Retained retained accessory accessory power power relay relay
• Rr hvac fuse 30a
• Rr wiper fuse 15a
• Rr wpr fuse 25a
• Run
• Secondary air injection (air) pump relay
• Selectable ride switch
• Seo ign fuse 10a
• Seq accy fuse 10a
• Start
• Starter relay
• Stud 1
• Stud 1 maxifuse 40a
• Stud 2
• Stud 2 maxifuse 30a
• To htr/ a/c fuse (diagram 3 of 4)
• To ign 1 relay (diagram 3 of 4)
• Turn fuse 20a
• Turn/ hazard switch
• Underhood bussed electrical center (on left side of engine compt)
• Vehicle control module (vcm)/ powertrain control module (pcm)
• Windshield washer motor
• Windshield washer switch
• Ws wiper fuse 25a

Power Distribution Wiring Diagram (3 of 4) for GMC Sierra 2500 1999

List of elements for Power Distribution Wiring Diagram (3 of 4) for GMC Sierra 2500 1999:

• (4.3l)
• (all other gas)
• (all pnk
• (engine harness) s199
• (not used)
• 4.3l
• 4wd fuse 15a
• All other gas
• Automatic transfer case (atc) control module
• Auxiliary battery relay
• Base
• Brake fuse 10a
• C10
• C11
• C12
• Clutch pedal position switch
• Crankshaft position (ckp) sensor
• D10
• E10
• E12
• Ecm 1 fuse 10a
• Electronic brake control module (ebcm)
• Etc fuse 15a
• From cruise fuse (diagram 2 of 4)
• From eng 1 fuse (diagram 2 of 4)
• From fuse link (diagram 1 of 4)
• From ign c fuse (diagram 2 of 4)
• Front axle actuator/ switch
• Fuel injector 1
• Fuel injector 2
• Fuel injector 3
• Fuel injector 4
• Fuel injector 5 (all gas)
• Fuel injector 6
• Fuel injector 7 (4.8l, 5.3l, 6.0l only)
• Fuel injector 8
• G114 (left rear of engine)
• Htr/ a/c fuse 25a
• Hvac 1 fuse 10a
• Hvac blower motor switch
• Hvac control module
• Ign 1 relay
• Ign 3 fuse 10a
• Ignition coil
• Ignition coil 1
• Ignition coil 2
• Ignition coil 3
• Ignition coil 4
• Ignition coil 5
• Ignition coil 6
• Ignition coil 7
• Ignition coil 8
• Ignition coil module
• Inj a fuse 15a
• Inj b fuse 15a
• Left bussed electrical center (on lower left side of dash)
• Mega fuse 125a
• Memory seat module
• Memory seat switch
• Mode door motor
• Nca
• Other gas)
• Pnk
• Recirculation door motor
• Red
• Right battery
• Right bussed electrical center (on lower right side of dash)
• Right heated seat switch
• S102
• S104
• S152 (eng pnk harn)
• S154 (eng pnk harn)
• Stoplamp switch
• Temperature door motor
• Underhood bussed electrical center (on left side of engine compt)
• Uplevel
• Vehicle control module (vcm) (4.3l)
• Vehicle control module (vcm)/ powertrain control module (pcm)

Power Distribution Wiring Diagram (4 of 4) for GMC Sierra 2500 1999

List of elements for Power Distribution Wiring Diagram (4 of 4) for GMC Sierra 2500 1999:

• A10
• Base
• C14
• Door lock fuse 20a
• Driver door unlock relay (w/ rke)
• From rap maxifuse (diagram 1 of 4)
• Left bussed electrical center (on lower left side of dash)
• Left full feature seat
• Left memory seat switch
• Left power door lock switch
• Left power seat
• Left power seat switch
• Left power window/ door lock switch
• Memory seat switch
• Mid bussed electrical center (under left side of dash)
• Mir/ lock fuse 3a
• Nca
• Power door lock relay
• Power door unlock relay
• Power mirror switch
• Red
• Retained accessory power relay
• Right full feature seat
• Right memory seat switch
• Right power door lock switch
• Right power seat
• Right power seat switch
• Right power window/ door lock switch
• Seats circuit breaker 25a
• Uplevel