GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Oil Pump Cover Fluid Passages - Oil Pump Body Side - 2 Piece Pump


Object Number: 53841  Size: LF
(2)Line
(17)Decrease
(43)Casting Void
(43)Casting Void
(43)Casting Void
Figure 2:

Oil Pump Cover Fluid Passages - Oil Pump Body Side - 3 Piece Pump


Object Number: 893339  Size: LF
(2)Line
(17)Decrease
(43)Casting Void
(43)Casting Void
Figure 3:

Oil Pump Body Fluid Passages - Oil Pump Cover Side - 2 Piece Pump


Object Number: 53838  Size: LF
(1)Suction
(2)Line
(2)Line
(17)Decrease
(42)Exhaust
(43)Casting Void
Figure 4:

Oil Pump Body Fluid Passages - Oil Pump Cover Side - 3 Piece Pump


Object Number: 893340  Size: LF
(1)Suction
(2)Line
(2)Line
(17)Decrease
(42)Exhaust
(43)Casting Void
Figure 5:

Oil Pump Body Fluid Passages - Control Valve Body Side - 2 Piece Pump


Object Number: 53840  Size: LF
(1)Suction
(2)Line
(2)Line
(2)Line
(17)Decrease
(42)Exhaust
Figure 6:

Oil Pump Body Fluid Passages - Control Valve Body Side - 3 Piece Pump


Object Number: 893341  Size: LF
(1)Suction
(2)Line
(2)Line
(2)Line
(17)Decrease
(42)Exhaust
Figure 7:

Control Valve Body Fluid Passages (Oil Pump Body Side)


Object Number: 871732  Size: LF
(1)Suction
(2)Line
(2)Line
(2)Line
(2)Line
(13)TCC Release
(13)TCC Release
(13)TCC Release
(17)Decrease
(18)D4
(18)D4
(18)D4
(19)Forward Servo
(19)Forward Servo
(29)3rd
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
Figure 8:

Control Valve Body Fluid Passages (Case Cover Side)


Object Number: 54145  Size: LF
(1)Suction
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(3)PRN
(4)2-3 Signal
(4)2-3 Signal
(5)1-2, 3-4 Signal
(5)1-2, 3-4 Signal
(6)Input Clutch Feed
(6)Input Clutch Feed
(7)Input Clutch
(7)Input Clutch
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(9)TCC Signal (PWM)
(9)TCC Signal (PWM)
(10)Actuator Feed
(10)Actuator Feed
(10)Actuator Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(12)TCC Regulated Apply
(12)TCC Regulated Apply
(13)TCC Release
(13)TCC Release
(13)TCC Release
(14)TCC Apply
(14)TCC Apply
(14)TCC Apply
(15)Cooler
(15)Cooler
(17)Decrease
(18)D4
(18)D4
(18)D4
(18)D4
(18)D4
(18)D4
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(20)Lo/1st Gear
(20)Lo/1st Gear
(21)Auxiliary Input Clutch Feed
(22)1-2 Accumulator
(22)1-2 Accumulator
(22)1-2 Accumulator
(23)2-3 Accumulator
(23)2-3 Accumulator
(23)2-3 Accumulator
(24)3-4 Accumulator
(24)3-4 Accumulator
(24)3-4 Accumulator
(25)2nd
(25)2nd
(25)2nd
(25)2nd
(27)2nd Clutch
(27)2nd Clutch
(28)2-3 Off Signal
(28)2-3 Off Signal
(28)2-3 Off Signal
(28)2-3 Off Signal
(28)2-3 Off Signal
(29)3rd
(29)3rd
(29)3rd
(29)3rd
(29)3rd
(29)3rd
(31)3rd Clutch
(31)3rd Clutch
(31)3rd Clutch
(33)4th Clutch
(35)D3
(36)D2
(36)D2
(36)D2
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(38)Lo
(38)Lo
(39)Lo-1st
(39)Lo-1st
(39)Lo-1st
(39)Lo-1st
(40)Reverse
(40)Reverse
(41)Reverse Servo
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(#5)Ball Check Valve
(#6)Ball Check Valve
(#7)Ball Check Valve
(#8)Ball Check Valve
(#9)Ball Check Valve
(#10)Ball Check Valve
Figure 9:

Control Valve Body to Spacer Plate Gasket Fluid Passages


Object Number: 54154  Size: LF
(1)Suction
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2/8)Line/Torque Signal
(2/11)Line/Converter Feed
(2/22)Line/1-2 Accumulator
(2/23)Line/2-3 Accumulator
(3)PRN
(5)1-2, 3-4 Signal
(6)Input Clutch Feed
(6)Input Clutch Feed
(7)Input Clutch
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(9)TCC Signal (PWM)
(9)TCC Signal (PWM)
(10)Actuator Feed
(10)Actuator Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(12)TCC Regulated Apply
(12)TCC Regulated Apply
(13)TCC Release
(13)TCC Release
(14)TCC Apply
(14)TCC Apply
(14)TCC Apply
(15)Cooler
(18)D4
(18)D4
(18)D4
(18)D4
(18)D4
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(20)Lo/1st Gear
(20)Lo/1st Gear
(22)1-2 Accumulator
(22)1-2 Accumulator
(23)2-3 Accumulator
(23)2-3 Accumulator
(23)2-3 Accumulator
(24)3-4 Accumulator
(24)3-4 Accumulator
(24)3-4 Accumulator
(25)2nd
(25)2nd
(25)2nd
(25)2nd
(26)2nd Exhaust
(27)2nd Clutch
(29)3rd
(29)3rd
(29)3rd
(29)3rd
(29)3rd
(29)3rd
(29)3rd
(31)3rd Clutch
(31)3rd Clutch
(31)3rd Clutch
(31)3rd Clutch
(33)4th Clutch
(34)4th Clutch Exhaust
(35)D3
(36)D2
(36)D2
(36)D2
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(38)Lo
(38)Lo
(38)Lo
(39)Lo-1st
(39)Lo-1st
(40)Reverse
(40)Reverse
(40)Reverse
(41)Reverse Servo
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(368)Spacer Plate and Gaskets/Control Valve Body Bolt
(368)Spacer Plate and Gaskets/Control Valve Body Bolt
(382)TCC Solenoid Valve Screen/Seal Assembly
(382)TCC Solenoid Valve Screen/Seal Assembly
Figure 10:

Spacer Plate Fluid Passages


Object Number: 872847  Size: LF
(1)Suction
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2/4)Line/2-3 Signal
(2/11)Line/Converter Feed
(3)PRN
(6)Input Clutch Feed
(6)Input Clutch Feed
(7)Input Clutch
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(9)TCC Signal (PWM)
(9)TCC Signal (PWM)
(10)Actuator Feed
(10)Actuator Feed
(10/5)Actuator Feed/1-2, 3-4 Signal
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(12)TCC Regulated Apply
(12)TCC Regulated Apply
(13)TCC Release
(13)TCC Release
(14)TCC Apply
(14)TCC Apply
(14)TCC Apply
(15)Cooler
(16/2)Lube/Line
(18)D4
(18)D4
(18)D4
(18)D4
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19/18)Forward Servo/D4
(19/18)Forward Servo/D4
(20)Lo/1st Gear
(20)Lo/1st Gear
(20/2)Lo/1st Gear/Line
(22)1-2 Accumulator
(22)1-2 Accumulator
(23)2-3 Accumulator
(23)2-3 Accumulator
(23)2-3 Accumulator
(24)3-4 Accumulator
(24)3-4 Accumulator
(24)3-4 Accumulator
(25)2nd
(25)2nd
(25)2nd
(25)2nd
(25)2nd
(26)2nd Exhaust
(27)2nd Clutch
(29)3rd
(29)3rd
(29)3rd
(29)3rd
(29)3rd
(29/31)3rd/3rd Clutch
(29/31)3rd/3rd Clutch
(31)3rd Clutch
(31)3rd Clutch
(31)3rd Clutch
(31/32)3rd Clutch/3rd Clutch/Lo-1st
(33)4th Clutch
(34)4th Clutch Exhaust
(35)D3
(35/29)D3/3rd
(36)D2
(36)D2
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(37/36)Manual 2-1 Servo/D2
(38)Lo
(38)Lo
(39)Lo-1st
(39)Lo-1st
(39/38)Lo-1st/Lo
(40)Reverse
(41)Reverse Servo
(41/40)Reverse Servo/Reverse
(41/40)Reverse Servo/Reverse
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(43/2)Casting Void/Line
(368)Spacer Plate and Gaskets/Control Valve Body Bolt Hole
(368)Spacer Plate and Gaskets/Control Valve Body Bolt Hole
(382)TCC Solenoid Valve Screen/Seal Assembly
(382)TCC Solenoid Valve Screen/Seal Assembly
Figure 11:

Spacer Plate to Case Cover Gasket Fluid Passages


Object Number: 54156  Size: LF
(1)Suction
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2/11)Line/Converter Feed
(3)PRN
(4)2-3 Signal
(6)Input Clutch Feed
(6)Input Clutch Feed
(7)Input Clutch
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(9)TCC Signal (PWM)
(9)TCC Signal (PWM)
(10)Actuator Feed
(10)Actuator Feed
(10)Actuator Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(12)TCC Regulated Apply
(12)TCC Regulated Apply
(13)TCC Release
(13)TCC Release
(14)TCC Apply
(14)TCC Apply
(14)TCC Apply
(15)Cooler
(16)Lube
(18)D4
(18)D4
(18)D4
(18)D4
(18)D4
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(20)Lo/1st Gear
(20)Lo/1st Gear
(22)1-2 Accumulator
(22)1-2 Accumulator
(23)2-3 Accumulator
(23)2-3 Accumulator
(23)2-3 Accumulator
(24)3-4 Accumulator
(24)3-4 Accumulator
(24)3-4 Accumulator
(25)2nd
(25)2nd
(25)2nd
(25)2nd
(26)2nd Exhaust
(27)2nd Clutch
(29)3rd
(29)3rd
(29)3rd
(29)3rd
(30)3rd/Exhaust
(32)3rd Clutch/Lo-1st
(31)3rd Clutch
(31)3rd Clutch
(31)3rd Clutch
(31)3rd Clutch
(33)4th Clutch
(34)4th Clutch Exhaust
(35)D3
(35)D3
(36)D2
(36)D2
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(38)Lo
(38)Lo
(39)Lo-1st
(39)Lo-1st
(39)Lo-1st
(40)Reverse
(41)Reverse Servo
(41)Reverse Servo
(41)Reverse Servo
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(43)Casting Void
(368)Spacer Plate and Gaskets/Control Valve Body Bolt
(382)TCC Solenoid Valve Screen/Seal Assembly
(382)TCC Solenoid Valve Screen/Seal Assembly
Figure 12:

Case Cover Fluid Passages (Control Valve Body Side)


Object Number: 54151  Size: LF
(1)Suction
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(3)PRN
(3)PRN
(3)PRN
(6)Input Clutch Feed
(7)Input Clutch
(7)Input Clutch
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(8)Torque Signal
(9)TCC Signal (PWM)
(10)Actuator Feed
(10)Actuator Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(11)Converter Feed
(12)TCC Regulated Apply
(13)TCC Release
(13)TCC Release
(13/14)TCC Release/TCC Apply
(14)TCC Apply
(14)TCC Apply
(15)Cooler
(16)Lube
(18)D4
(18)D4
(18)D4
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(20)Lo/1st Gear
(20)Lo/1st Gear
(22)1-2 Accumulator
(22)1-2 Accumulator
(23)2-3 Accumulator
(23)2-3 Accumulator
(24)3-4 Accumulator
(24)3-4 Accumulator
(25)2nd
(25)2nd
(25)2nd
(25)2nd
(27)2nd Clutch
(27)2nd Clutch
(29)3rd
(29)3rd
(29)3rd
(29)3rd
(31)3rd Clutch
(31)3rd Clutch
(32)3rd Clutch/Lo-1st
(33)4th Clutch
(33)4th Clutch
(35)D3
(35)D3
(35)D3
(36)D2
(36)D2
(36)D2
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(38)Lo
(38)Lo
(39)Lo-1st
(39)Lo-1st
(39)Lo-1st
(39)Lo-1st
(39)Lo-1st
(40)Reverse
(41)Reverse Servo
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(43)Casting Void
(#1)Ball Check Valve
(#2)Ball Check Valve
(#3)Ball Check Valve
(#4)Ball Check Valve
Figure 13:

Case Cover Fluid Passages (Case Side)


Object Number: 54157  Size: MF
(1)Suction
(1)Suction
(2)Line
(2)Line
(3)PRN
(3)PRN
(7)Input Clutch
(10)Actuator Feed
(13)TCC Release
(15)Cooler
(15)Cooler
(16)Lube
(16)Lube
(19)Forward Servo
(22)1-2 Accumulator
(23)2-3 Accumulator
(24)3-4 Accumulator
(27)2nd Clutch
(27)2nd Clutch
(31)3rd Clutch
(32)3rd Clutch/Lo-1st
(33)4th Clutch
(33)4th Clutch
(35)D3
(37)Manual 2-1 Servo
(38)Lo
(41)Reverse Servo
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(42)Exhaust
(43)Casting Void
(412)Orificed Cup Plug
Figure 14:

Driven Sprocket Support Fluid Passages


Object Number: 54170  Size: MF
(7)Input Clutch
(7)Input Clutch
(7)Input Clutch
(7)Input Clutch
(16)Lube
(16)Lube
(16)Lube
(16)Lube
(16)Lube
(16)Lube
(27)2nd Clutch
(27)2nd Clutch
(27)2nd Clutch
(32)3rd Clutch/Lo-1st
(32)3rd Clutch/Lo-1st
(32)3rd Clutch/Lo-1st
(32)3rd Clutch/Lo-1st
(33)4th Clutch
(33)4th Clutch
Figure 15:

Oil Pump Drive Shaft and Drive Sprocket Support Fluid Passages


Object Number: 54143  Size: MF
(1)Steel Sleeve
(2)TCC Apply Passage
(2)TCC Apply Passage
(3)Converter Seal Drainback Passage
(4)TCC Release Passage
(4)TCC Release Passage
(227)Oil Pump Drive Shaft Assembly
(513)Turbine Shaft Oil Seal Ring
(515)Drive Sprocket Retaining Ring
(516)Drive Sprocket
(517)Drive Sprocket Thrust Washer
(518)Turbine Shaft
(519)Turbine Shaft Oil Seal Ring
(520)Turbine Shaft O-Ring Seal
(521)Drive Sprocket Bearing Assembly
(522)Drive Sprocket Support
(523)Drive Sprocket Support Bushing
(527)Vehicle Speed Sensor Reluctor Wheel Assembly
Figure 16:

Case Fluid Passages (Case Cover Side)


Object Number: 54159  Size: LF
(1)Suction
(1)Suction
(2)Line
(3)PRN
(10)Actuator Feed
(13)TCC Release
(15)Cooler
(19)Forward Servo
(22)1-2 Accumulator
(23)2-3 Accumulator
(27)2nd Clutch
(31)3rd Clutch
(35)D3
(37)Manual 2-1 Servo
(38)Lo
(41)Reverse Servo
(42)Exhaust
(43)Casting Void
(43)Casting Void
(44)Vent
(45)Thermo Element Exhaust
(45)Thermo Element Exhaust
Figure 17:

Case Fluid Passages (Bottom)


Object Number: 54161  Size: LF
(1)Suction
(16)Lube
(16)Lube
(19)Forward Servo
(19)Forward Servo
(22)1-2 Accumulator
(23)2-3 Accumulator
(27)2nd Clutch
(31)3rd Clutch
(37)Manual 2-1 Servo
(43)Casting Void
(45)Thermo Element Exhaust
Figure 18:

1-2 and 2-3 Accumulator Housing Fluid Passages


Object Number: 54167  Size: LF
(16)Lube
(16)Lube
(22)1-2 Accumulator
(22)1-2 Accumulator
(23)2-3 Accumulator
(23)2-3 Accumulator
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
Figure 19:

Accumulator Cover Spacer Plate Fluid Passages


Object Number: 54164  Size: LF
(16)Lube
(16)Lube
(16)Lube
(19)Forward Servo
(22)1-2 Accumulator
(22)1-2 Accumulator
(23)2-3 Accumulator
(23)2-3 Accumulator
(27)2nd Clutch
(31)3rd Clutch
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
Figure 20:

Accumulator Cover Fluid Passages


Object Number: 54163  Size: LF
(16)Lube
(16)Lube
(19)Forward Servo
(19)Forward Servo
(19)Forward Servo
(22)1-2 Accumulator
(22)1-2 Accumulator
(23)2-3 Accumulator
(27)2nd Clutch
(27)2nd Clutch
(31)3rd Clutch
(31)3rd Clutch
(37)Manual 2-1 Servo
(37)Manual 2-1 Servo
(124)Forward Band Servo Oil Pipe
(125)Manual 2-1 Band Servo Oil Pipe
(126)Lube Oil Pipe
Figure 21:

Manual 2-1 Band Servo Cover Fluid Passages


Object Number: 54168  Size: LF
(19)Forward Servo
(37)Manual 2-1 Servo
(124)Forward Band Servo Oil Pipe
(125)Manual 2-1 Band Servo Oil Pipe