TRANSMISSION – GMC Sierra 2500 1999 – SYSTEM WIRING DIAGRAMS

TRANSMISSION

4.3L

4.3L VIN W, A/T Wiring Diagram, 4L60-E for GMC Sierra 2500 1999

List of elements for 4.3L VIN W, A/T Wiring Diagram, 4L60-E for GMC Sierra 2500 1999:

• (in engine harness) s107
• (left side of dash) splice pack sp205
• (left side of engine compt)
• (not used) a
• (right rear of engine)
• +5v
• 1-2 shift solenoid
• 1-2 ss
• 2-3 shift solenoid
• 2-3 ss
• 3-2 ctrl solenoid
• 3-2 ss
• 4wd circuit (front axle & transfer case switch)
• 4wd low
• A/t fluid pressure manual valve position switch
• A12
• Automatic transmission (4l60-e)
• Body control module (on lower left side of dash, below steering column)
• Brake fuse 10a
• Brk sw
• C11
• Cls 2 data
• D3, d2
• D4, d2
• Data link connector (under left side of dash)
• Ecm1 fuse 10a
• Ecmb fuse 20a
• Ect sig
• Engine controls
• Engine coolant temperature sensor (left rear of cylinder head)
• Fluid temp sensor
• Frt axle sw
• G117
• G117 (right rear of engine)
• Gnd
• Harness) s105
• Hot at all times
• Hot in run
• Hot in run & start
• Ign
• Ign0 fuse 10a
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Malfunction indicator lamp
• Mid bussed electrical center (lower c1
• Mil ctrl
• Park/neutral position switch (left side of transmission)
• Pc sol hi
• Pc sol lo
• Pnk
• Press ctrl solenoid
• Prnd a
• Prnd b
• Prnd c
• Prnd p
• Range b
• Range c
• Red
• Return
• Rev, lo
• S103
• Stoplamp switch (top of brake pedal)
• Tan
• Tcc pwm
• Tcc pwm solenoid
• Tcc sol
• Tcc solenoid
• Tft sens sig
• Throttle position sensor (on throttle body assy)
• Tp sig
• Trans rng a
• Underhood bussed electrical center (left side of engine compt)
• Underhood bussed electrical center c2
• Vehicle control module (left front of engine compt)
• Vehicle speed sensor (left rear of transmission)
• Vss high
• Vss low

Transfer Case Wiring Diagram, Electronic for GMC Sierra 2500 1999

List of elements for Transfer Case Wiring Diagram, Electronic for GMC Sierra 2500 1999:

• (left front of engine compt) powertrain control module
• (left front of engine compt) vehicle control module
• (on left front body mount) g102
• (under left side of dash) data link connector
• +8v ref
• +8v ref out
• 2-hi ind
• 4-hi ind
• 4-lo ind
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• 4wd sw (lo)
• 4wd sw sig
• 4wd whl lock
• Atc fuse 20a
• Auto
• Automatic transfer case control module (left side of dash, above headlamp switch)
• Auxiliary battery relay
• Awd ind
• Brake control
• Channel-a
• Channel-b
• Channel-c
• Channel-p
• Class ii data
• Ctrl
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Encoder logic
• Encoder motor
• Encoder rtn
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Front axle actuator/ switch
• Front drive shaft speed sensor
• Ft axle ctrl
• Ft shaft rtn
• Ft shaft sig
• G102 (on left front body mount)
• G200 (upper left kick panel)
• Gnd
• Hot at all times
• Hot in run
• Hot in run & start
• Ign 3 (run)
• Ign1 fuse 10a
• Illumination lamp (2)
• Instrument cluster
• Interior lights system
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Lock sol out
• Logic
• Mid bussed electrical center (lower c1
• Module gnd
• Motor (ccw)
• Motor (cw)
• Nca
• Neutral ind
• Pnk
• Rear drive shaft speed sensor
• Red
• Rr shaft rtn
• Rr shaft sig
• S199
• Shift motor
• Solid state
• Splice pack sp203
• Splice pack sp205 (left side of dash)
• Tan
• Transfer case select switch
• Underhood bussed electrical center (left side of engine compt)

Transfer Case Wiring Diagram, Manual for GMC Sierra 2500 1999

List of elements for Transfer Case Wiring Diagram, Manual for GMC Sierra 2500 1999:

• (left side of engine compt)
• (under left side of dash) data link connector
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• Auxiliary battery relay
• C2 underhood bussed electrical center c2
• Electronic brake control module
• Front axle actuator/ switch
• G102 (on left front body mount)
• Hot in run
• Hot in run & start
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Logic
• Mid bussed electrical center (lower c1
• Pnk
• Powertrain control module (left front of engine compt)
• S199
• Splice pack sp205 (left side of dash)
• Transfer case switch (top left of transfer case)
• Vehicle control module (left front of engine compt)

4.8L

4.8L VIN V, A/T Wiring Diagram, 4L60-E for GMC Sierra 2500 1999

List of elements for 4.8L VIN V, A/T Wiring Diagram, 4L60-E for GMC Sierra 2500 1999:

• (left side of engine compt)
• (not used) a
• +5v
• 1-2 shift solenoid
• 1-2 ss
• 2-3 shift solenoid
• 2-3 ss
• 3-2 ctrl solenoid
• 3-2 ss
• 4wd circuit (front axle & transfer case switch)
• 4wd low
• A/t fluid pressure manual valve position switch
• A10
• A12
• Automatic transmission (4l60-e)
• Body control module (on lower left side of dash, below steering column)
• Brake fuse 10a
• Brk sw
• C11
• Cls 2 data
• D3, d2
• D4, d2
• Data link connector (under left side of dash)
• Ecm1 fuse 10a
• Ecmb fuse 20a
• Ect sig
• Engine coolant temperature sensor (left front of cylinder head)
• Fluid temp sensor
• Frt axle sw
• G117 (right rear of engine)
• Gnd
• Hot at all times
• Hot in run
• Hot in run & start
• Ign
• Ign0 fuse 10a
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Malfunction indicator lamp
• Mid bussed electrical center (lower c1
• Mil ctrl
• Park/neutral position switch (left side of transmission)
• Pc sol hi
• Pc sol lo
• Pnk
• Powertrain control module (left front of engine compt)
• Press ctrl solenoid
• Prnd a
• Prnd b
• Prnd c
• Prnd p
• Range b
• Range c
• Red
• Rev, lo
• S103
• Sens gnd
• Splice pack sp205 (left side of dash)
• Stoplamp switch (top of brake pedal)
• Tan
• Tcc pwm
• Tcc pwm solenoid
• Tcc sol
• Tcc solenoid
• Tft sens sig
• Throttle position sensor (on throttle body assy)
• Tp sig
• Trans rng a
• Underhood bussed electrical center (left side of engine compt)
• Underhood bussed electrical center c2
• Vehicle speed sensor (left rear of transmission)
• Vss adapter (4wd) (left side of trans)
• Vss high
• Vss low

Transfer Case Wiring Diagram, Electronic for GMC Sierra 2500 1999

List of elements for Transfer Case Wiring Diagram, Electronic for GMC Sierra 2500 1999:

• (left front of engine compt) powertrain control module
• (left front of engine compt) vehicle control module
• (on left front body mount) g102
• (under left side of dash) data link connector
• +8v ref
• +8v ref out
• 2-hi ind
• 4-hi ind
• 4-lo ind
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• 4wd sw (lo)
• 4wd sw sig
• 4wd whl lock
• Atc fuse 20a
• Auto
• Automatic transfer case control module (left side of dash, above headlamp switch)
• Auxiliary battery relay
• Awd ind
• Brake control
• Channel-a
• Channel-b
• Channel-c
• Channel-p
• Class ii data
• Ctrl
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Encoder logic
• Encoder motor
• Encoder rtn
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Front axle actuator/ switch
• Front drive shaft speed sensor
• Ft axle ctrl
• Ft shaft rtn
• Ft shaft sig
• G102 (on left front body mount)
• G200 (upper left kick panel)
• Gnd
• Hot at all times
• Hot in run
• Hot in run & start
• Ign 3 (run)
• Ign1 fuse 10a
• Illumination lamp (2)
• Instrument cluster
• Interior lights system
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Lock sol out
• Logic
• Mid bussed electrical center (lower c1
• Module gnd
• Motor (ccw)
• Motor (cw)
• Nca
• Neutral ind
• Pnk
• Rear drive shaft speed sensor
• Red
• Rr shaft rtn
• Rr shaft sig
• S199
• Shift motor
• Solid state
• Splice pack sp203
• Splice pack sp205 (left side of dash)
• Tan
• Transfer case select switch
• Underhood bussed electrical center (left side of engine compt)

Transfer Case Wiring Diagram, Manual for GMC Sierra 2500 1999

List of elements for Transfer Case Wiring Diagram, Manual for GMC Sierra 2500 1999:

• (left side of engine compt)
• (under left side of dash) data link connector
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• Auxiliary battery relay
• C2 underhood bussed electrical center c2
• Electronic brake control module
• Front axle actuator/ switch
• G102 (on left front body mount)
• Hot in run
• Hot in run & start
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Logic
• Mid bussed electrical center (lower c1
• Pnk
• Powertrain control module (left front of engine compt)
• S199
• Splice pack sp205 (left side of dash)
• Transfer case switch (top left of transfer case)
• Vehicle control module (left front of engine compt)

5.3L

5.3L VIN T, A/T Wiring Diagram, 4L60-E for GMC Sierra 2500 1999

List of elements for 5.3L VIN T, A/T Wiring Diagram, 4L60-E for GMC Sierra 2500 1999:

• (left side of engine compt)
• (not used) a
• +5v
• 1-2 shift solenoid
• 1-2 ss
• 2-3 shift solenoid
• 2-3 ss
• 3-2 ctrl solenoid
• 3-2 ss
• 4wd circuit (front axle & transfer case switch)
• 4wd low
• A/t fluid pressure manual valve position switch
• A10
• A12
• Automatic transmission (4l60-e)
• Body control module (on lower left side of dash, below steering column)
• Brake fuse 10a
• Brk sw
• C11
• Cls 2 data
• D3, d2
• D4, d2
• Data link connector (under left side of dash)
• Ecm1 fuse 10a
• Ecmb fuse 20a
• Ect sig
• Engine coolant temperature sensor (left front of cylinder head)
• Fluid temp sensor
• Frt axle sw
• G117 (right rear of engine)
• Gnd
• Hot at all times
• Hot in run
• Hot in run & start
• Ign
• Ign0 fuse 10a
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Malfunction indicator lamp
• Mid bussed electrical center (lower c1
• Mil ctrl
• Park/neutral position switch (left side of transmission)
• Pc sol hi
• Pc sol lo
• Pnk
• Powertrain control module (left front of engine compt)
• Press ctrl solenoid
• Prnd a
• Prnd b
• Prnd c
• Prnd p
• Range b
• Range c
• Red
• Rev, lo
• S103
• Sens gnd
• Splice pack sp205 (left side of dash)
• Stoplamp switch (top of brake pedal)
• Tan
• Tcc pwm
• Tcc pwm solenoid
• Tcc sol
• Tcc solenoid
• Tft sens sig
• Throttle position sensor (on throttle body assy)
• Tp sig
• Trans rng a
• Underhood bussed electrical center (left side of engine compt)
• Underhood bussed electrical center c2
• Vehicle speed sensor (left rear of transmission)
• Vss adapter (4wd) (left side of trans)
• Vss high
• Vss low

Transfer Case Wiring Diagram, Electronic for GMC Sierra 2500 1999

List of elements for Transfer Case Wiring Diagram, Electronic for GMC Sierra 2500 1999:

• (left front of engine compt) powertrain control module
• (left front of engine compt) vehicle control module
• (on left front body mount) g102
• (under left side of dash) data link connector
• +8v ref
• +8v ref out
• 2-hi ind
• 4-hi ind
• 4-lo ind
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• 4wd sw (lo)
• 4wd sw sig
• 4wd whl lock
• Atc fuse 20a
• Auto
• Automatic transfer case control module (left side of dash, above headlamp switch)
• Auxiliary battery relay
• Awd ind
• Brake control
• Channel-a
• Channel-b
• Channel-c
• Channel-p
• Class ii data
• Ctrl
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Encoder logic
• Encoder motor
• Encoder rtn
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Front axle actuator/ switch
• Front drive shaft speed sensor
• Ft axle ctrl
• Ft shaft rtn
• Ft shaft sig
• G102 (on left front body mount)
• G200 (upper left kick panel)
• Gnd
• Hot at all times
• Hot in run
• Hot in run & start
• Ign 3 (run)
• Ign1 fuse 10a
• Illumination lamp (2)
• Instrument cluster
• Interior lights system
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Lock sol out
• Logic
• Mid bussed electrical center (lower c1
• Module gnd
• Motor (ccw)
• Motor (cw)
• Nca
• Neutral ind
• Pnk
• Rear drive shaft speed sensor
• Red
• Rr shaft rtn
• Rr shaft sig
• S199
• Shift motor
• Solid state
• Splice pack sp203
• Splice pack sp205 (left side of dash)
• Tan
• Transfer case select switch
• Underhood bussed electrical center (left side of engine compt)

Transfer Case Wiring Diagram, Manual for GMC Sierra 2500 1999

List of elements for Transfer Case Wiring Diagram, Manual for GMC Sierra 2500 1999:

• (left side of engine compt)
• (under left side of dash) data link connector
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• Auxiliary battery relay
• C2 underhood bussed electrical center c2
• Electronic brake control module
• Front axle actuator/ switch
• G102 (on left front body mount)
• Hot in run
• Hot in run & start
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Logic
• Mid bussed electrical center (lower c1
• Pnk
• Powertrain control module (left front of engine compt)
• S199
• Splice pack sp205 (left side of dash)
• Transfer case switch (top left of transfer case)
• Vehicle control module (left front of engine compt)