TRANSMISSION – GMC Cab & Chassis C2500 1994 – SYSTEM WIRING DIAGRAMS

TRANSMISSION

4.3L

4.3L (VIN Z), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C2500 1994

List of elements for 4.3L (VIN Z), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C2500 1994:

• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 3-2 shift sol
• 3-2 shift sol ctrl
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Data link connector (below left side of i/p)
• Diagnostic test
• E10
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc
• Tcc sol
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sensor (right side of tbi)
• Tp reference
• Tp signal
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

4.3L (VIN Z), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994

List of elements for 4.3L (VIN Z), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994:

• (below left side of i/p) data link connector
• (left side of transmission) transmission input speed sensor
• (under right end of i/p)
• 1-2 shift sol
• 2-3 shift sol
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Dlc
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Input speed hi
• Input speed lo
• Pcm trans shift sol a
• Pcm trans shift sol b
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc sol
• Tcc sol ctrl
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sens
• Throttle position sensor (right side of tbi)
• Tp reference
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

Transfer Case Wiring Diagram, Except K300 for GMC Cab & Chassis C2500 1994

List of elements for Transfer Case Wiring Diagram, Except K300 for GMC Cab & Chassis C2500 1994:

• module
• (under right end of i/p)
• 4 wheel drive input (not used)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control
• Convenience center (under left side of i/p)
• Ehcu module (near master cylinder)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Rwal diode module (under left side of i/p)
• Suburban, yukon
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case switch (left top of transfer case)
• W h t

Transfer Case Wiring Diagram, K300 Only for GMC Cab & Chassis C2500 1994

List of elements for Transfer Case Wiring Diagram, K300 Only for GMC Cab & Chassis C2500 1994:

• (under right end of i/p)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control module
• Convenience center (under left side of i/p)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Red
• Rwal diode module (under left side of i/p)
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case relay (right rear of eng compt, near battery junction block)
• Transfer case switch (left top of transfer case)
• Transfer case syncronizer
• W h t

5.0L

5.0L (VIN H), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C2500 1994

List of elements for 5.0L (VIN H), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C2500 1994:

• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 3-2 shift sol
• 3-2 shift sol ctrl
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Data link connector (below left side of i/p)
• Diagnostic test
• E10
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc
• Tcc sol
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sensor (right side of tbi)
• Tp reference
• Tp signal
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

Transfer Case Wiring Diagram, Except K300 for GMC Cab & Chassis C2500 1994

List of elements for Transfer Case Wiring Diagram, Except K300 for GMC Cab & Chassis C2500 1994:

• module
• (under right end of i/p)
• 4 wheel drive input (not used)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control
• Convenience center (under left side of i/p)
• Ehcu module (near master cylinder)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Rwal diode module (under left side of i/p)
• Suburban, yukon
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case switch (left top of transfer case)
• W h t

Transfer Case Wiring Diagram, K300 Only for GMC Cab & Chassis C2500 1994

List of elements for Transfer Case Wiring Diagram, K300 Only for GMC Cab & Chassis C2500 1994:

• (under right end of i/p)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control module
• Convenience center (under left side of i/p)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Red
• Rwal diode module (under left side of i/p)
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case relay (right rear of eng compt, near battery junction block)
• Transfer case switch (left top of transfer case)
• Transfer case syncronizer
• W h t

5.7L

5.7L (VIN K), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C2500 1994

List of elements for 5.7L (VIN K), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C2500 1994:

• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 3-2 shift sol
• 3-2 shift sol ctrl
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Data link connector (below left side of i/p)
• Diagnostic test
• E10
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc
• Tcc sol
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sensor (right side of tbi)
• Tp reference
• Tp signal
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

5.7L (VIN K), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994

List of elements for 5.7L (VIN K), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994:

• (below left side of i/p) data link connector
• (left side of transmission) transmission input speed sensor
• (under right end of i/p)
• 1-2 shift sol
• 2-3 shift sol
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Dlc
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Input speed hi
• Input speed lo
• Pcm trans shift sol a
• Pcm trans shift sol b
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc sol
• Tcc sol ctrl
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sens
• Throttle position sensor (right side of tbi)
• Tp reference
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

Transfer Case Wiring Diagram, Except K300 for GMC Cab & Chassis C2500 1994

List of elements for Transfer Case Wiring Diagram, Except K300 for GMC Cab & Chassis C2500 1994:

• module
• (under right end of i/p)
• 4 wheel drive input (not used)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control
• Convenience center (under left side of i/p)
• Ehcu module (near master cylinder)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Rwal diode module (under left side of i/p)
• Suburban, yukon
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case switch (left top of transfer case)
• W h t

Transfer Case Wiring Diagram, K300 Only for GMC Cab & Chassis C2500 1994

List of elements for Transfer Case Wiring Diagram, K300 Only for GMC Cab & Chassis C2500 1994:

• (under right end of i/p)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control module
• Convenience center (under left side of i/p)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Red
• Rwal diode module (under left side of i/p)
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case relay (right rear of eng compt, near battery junction block)
• Transfer case switch (left top of transfer case)
• Transfer case syncronizer
• W h t

6.5L

6.5L (VIN F), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994

List of elements for 6.5L (VIN F), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994:

• (tft)
• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 4 wheel drive low sig
• A12
• Accelerator pedal position (app) module (top of acce- lerator bracket)
• App #1
• App #1 sensor 5v ref
• App #1 sensor ground
• App #1 sensor sig
• App #2
• App #2 sensor 5v ref
• App #2 sensor ground
• App #2 sensor sig
• App #3
• App #3 sensor 5v ref
• App #3 sensor ground
• App #3 sensor sig
• B10
• Battery feed
• Bracket)
• C11
• C12
• C13
• C14
• C15
• D11
• D12
• Data link connector (below left side of i/p)
• Diagnostic request
• E10
• E13
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (right side of engine)
• Fuse block
• G117 (right rear of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module
• Pressure control solenoid
• Pressure ctrl sol hi
• Pressure ctrl sol lo
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tan
• Tcc
• Tcc sol
• Tcc/ brake switch (on brake pedal support
• Tcc/brake sw
• Test or start
• Trans fluid temp
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd sig hi
• Trans input spd sig lo
• Trans output spd sig
• Transfer case switch
• Transmission input speed sensor (left side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vehicle speed sig

6.5L (VIN P), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C2500 1994

List of elements for 6.5L (VIN P), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C2500 1994:

• (tft)
• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 3-2 control sol
• 3-2 shift sol
• 4 wheel drive low sig
• A12
• Accelerator pedal position (app) module (top of acce- lerator bracket)
• App #1
• App #1 sensor 5v ref
• App #1 sensor ground
• App #1 sensor sig
• App #2
• App #2 sensor 5v ref
• App #2 sensor ground
• App #2 sensor sig
• App #3
• App #3 sensor 5v ref
• App #3 sensor ground
• App #3 sensor sig
• B10
• Battery feed
• Bracket)
• C11
• C12
• C13
• C14
• C15
• D11
• Data link connector (below left side of i/p)
• Diagnostic request
• E10
• E13
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (right side of engine)
• Fuse block
• G117 (right rear of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module
• Pressure control solenoid
• Pressure ctrl sol hi
• Pressure ctrl sol lo
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tan
• Tcc sol
• Tcc sol ctrl
• Tcc/ brake switch (on brake pedal support
• Tcc/brake sw
• Test or start
• Trans fluid temp
• Trans fluid temp sig
• Trans fuse 10a
• Trans output spd sig
• Transfer case switch
• Vehicle speed sensor buffer (under right end of i/p)
• Vehicle speed sig

6.5L (VIN P), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994

List of elements for 6.5L (VIN P), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994:

• (tft)
• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 4 wheel drive low sig
• A12
• Accelerator pedal position (app) module (top of acce- lerator bracket)
• App #1
• App #1 sensor 5v ref
• App #1 sensor ground
• App #1 sensor sig
• App #2
• App #2 sensor 5v ref
• App #2 sensor ground
• App #2 sensor sig
• App #3
• App #3 sensor 5v ref
• App #3 sensor ground
• App #3 sensor sig
• B10
• Battery feed
• Bracket)
• C11
• C12
• C13
• C14
• C15
• D11
• D12
• Data link connector (below left side of i/p)
• Diagnostic request
• E10
• E13
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (right side of engine)
• Fuse block
• G117 (right rear of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module
• Pressure control solenoid
• Pressure ctrl sol hi
• Pressure ctrl sol lo
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tan
• Tcc
• Tcc sol
• Tcc/ brake switch (on brake pedal support
• Tcc/brake sw
• Test or start
• Trans fluid temp
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd sig hi
• Trans input spd sig lo
• Trans output spd sig
• Transfer case switch
• Transmission input speed sensor (left side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vehicle speed sig

6.5L (VIN S), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994

List of elements for 6.5L (VIN S), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994:

• (tft)
• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 4 wheel drive low sig
• A12
• Accelerator pedal position (app) module (top of acce- lerator bracket)
• App #1
• App #1 sensor 5v ref
• App #1 sensor ground
• App #1 sensor sig
• App #2
• App #2 sensor 5v ref
• App #2 sensor ground
• App #2 sensor sig
• App #3
• App #3 sensor 5v ref
• App #3 sensor ground
• App #3 sensor sig
• B10
• Battery feed
• Bracket)
• C11
• C12
• C13
• C14
• C15
• D11
• D12
• Data link connector (below left side of i/p)
• Diagnostic request
• E10
• E13
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (right side of engine)
• Fuse block
• G117 (right rear of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module
• Pressure control solenoid
• Pressure ctrl sol hi
• Pressure ctrl sol lo
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tan
• Tcc
• Tcc sol
• Tcc/ brake switch (on brake pedal support
• Tcc/brake sw
• Test or start
• Trans fluid temp
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd sig hi
• Trans input spd sig lo
• Trans output spd sig
• Transfer case switch
• Transmission input speed sensor (left side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vehicle speed sig

Transfer Case Wiring Diagram, Except K300 for GMC Cab & Chassis C2500 1994

List of elements for Transfer Case Wiring Diagram, Except K300 for GMC Cab & Chassis C2500 1994:

• module
• (under right end of i/p)
• 4 wheel drive input (not used)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control
• Convenience center (under left side of i/p)
• Ehcu module (near master cylinder)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Rwal diode module (under left side of i/p)
• Suburban, yukon
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case switch (left top of transfer case)
• W h t

Transfer Case Wiring Diagram, K300 Only for GMC Cab & Chassis C2500 1994

List of elements for Transfer Case Wiring Diagram, K300 Only for GMC Cab & Chassis C2500 1994:

• (under right end of i/p)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control module
• Convenience center (under left side of i/p)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Red
• Rwal diode module (under left side of i/p)
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case relay (right rear of eng compt, near battery junction block)
• Transfer case switch (left top of transfer case)
• Transfer case syncronizer
• W h t

7.4L

7.4L (VIN N), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994

List of elements for 7.4L (VIN N), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C2500 1994:

• (below left side of i/p) data link connector
• (left side of transmission) transmission input speed sensor
• (under right end of i/p)
• 1-2 shift sol
• 2-3 shift sol
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Dlc
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Input speed hi
• Input speed lo
• Pcm trans shift sol a
• Pcm trans shift sol b
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc sol
• Tcc sol ctrl
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sens
• Throttle position sensor (right side of tbi)
• Tp reference
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

Transfer Case Wiring Diagram, Except K300 for GMC Cab & Chassis C2500 1994

List of elements for Transfer Case Wiring Diagram, Except K300 for GMC Cab & Chassis C2500 1994:

• module
• (under right end of i/p)
• 4 wheel drive input (not used)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control
• Convenience center (under left side of i/p)
• Ehcu module (near master cylinder)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Rwal diode module (under left side of i/p)
• Suburban, yukon
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case switch (left top of transfer case)
• W h t

Transfer Case Wiring Diagram, K300 Only for GMC Cab & Chassis C2500 1994

List of elements for Transfer Case Wiring Diagram, K300 Only for GMC Cab & Chassis C2500 1994:

• (under right end of i/p)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control module
• Convenience center (under left side of i/p)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Red
• Rwal diode module (under left side of i/p)
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case relay (right rear of eng compt, near battery junction block)
• Transfer case switch (left top of transfer case)
• Transfer case syncronizer
• W h t