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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E 🢒 Automatic Transmission Controls Schematics

Automatic Transmission Controls Schematics L18

Figure 1:

L18 TCC/Stoplamp Switch and Shift Solenoids
Object Number: 650850 Size: FS
ABS, Blower, Stop-Haz, and IGN B Fuses, and Ignition Switch
Brake, Cruise, SEO TP-2, and Htr-A/C Fuses
IGN A Fuse and Ignition Switch
Pwr Wdos Circuit Breaker, Wiper, Radio, Clock, and Trans Fuses
Master Electrical Component List
Electronic Component Description
L18 Internal Switches, TFT, PC Solenoid Valve, and Shaft Speed Sensors
OBD II Symbol Description Notice
EBCM Stoplamp Switch and Wheel Speed Inputs
Figure 2:

L18 Internal Switches, TFT, PC Solenoid Valve, and Shaft Speed Sensors
Object Number: 650851 Size: FS
Master Electrical Component List
Electronic Component Description
L18 TCC/Stoplamp Switch and Shift Solenoids
OBD II Symbol Description Notice
G105, L18, 1 of 2, All Except Ignition Coils

Automatic Transmission Controls Schematics L65

Figure 1:

L65 TCC/Stoplamp Switch and Shift Solenoids
Object Number: 650853 Size: FS
Lighting and Battery Fuses
Stop/Haz, Radio Batt, Aux Pwr, and Cig Ltr Fuses
IGN A Fuse and Ignition Switch
Pwr Wdos Circuit Breaker, Wiper, Radio, Clock, and Trans Fuses
Master Electrical Component List
Electronic Component Description
L65 Internal Switches, TFT, PC Solenoid Valve, and Shaft Speed Sensors
OBD II Symbol Description Notice
Stop and Turn/Hazard Lamps Controls
Figure 2:

L65 Internal Switches, TFT, PC Solenoid Valve, and Shaft Speed Sensors
Object Number: 650854 Size: FS
Master Electrical Component List
Electronic Component Description
L65 TCC/Stoplamp Switch and Shift Solenoids
OBD II Symbol Description Notice
VSS Circuit
Wastegate Solenoid, Boost Sensor, IAT Sensor, ECT Sensor, and PTO
CKP and Injection Timing Stepper Motor

Automatic Transmission Controls Schematics Range Switch

Transmission Range Display Circuit
Object Number: 651768 Size: FS
Master Electrical Component List
Electronic Component Description
IGN A Fuse and Ignition Switch
Pwr Wdos Circuit Breaker, Wiper, Radio, Clock, and Trans Fuses
Instrument Lamps Dimming Circuits
G105, L18, 1 of 2, All Except Ignition Coils
G105 and G106 (L65 Except Frame Ground)
G104, L65
G104, L18, 1 of 2, All Except HO2S Circuit