GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Catera 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L30-E 🢒 Automatic Transmission Electronic Component Views
Figure 1:

LH Side of Transmission
Object Number: 189260 Size: LF
(1)Engine Control Module (ECM) Harness
(2)Vehicle Speed Sensor (VSS)
(3)Connector to Rear HO2S (Bank 1, Position 2)
(4)Connector to Rear HO2S (Bank 2, Position 2)
(5)Main Case Connector
(6)Automatic Transmission Range Switch
(7)Case Adapter
(8)Harness to Front HO2S (Bank 1, Position 1)
(9)Connector to Front HO2s (Bank 1, Position 1)
Figure 2:

Internal Electrical Components
Object Number: 381235 Size: LF
(45)Vehicle Speed Sensor (VSS) Assembly
(303)On/Off N.C. Solenoid Assembly
(307)On/Off N.O. Solenoid Assembly
(323) Band Control PWM Solenoid Assembly
(404)Pressure Control (PC) Solenoid
(416)Torque Converter Clutch (TCC) On/Off N.C. Solenoid

Internal Electrical Components
Object Number: 381235 Size: LF
(45)Vehicle Speed Sensor (VSS) Assembly
(303)On/Off N.C. Solenoid Assembly
(307)On/Off N.O. Solenoid Assembly
(323) Band Control PWM Solenoid Assembly
(404)Pressure Control (PC) Solenoid
(416)Torque Converter Clutch (TCC) On/Off N.C. Solenoid