GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 LeSabre 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 5L40-E/5L50-E 🢒 Fluid Passages
Figure 1:

Torque Converter Housing - Fluid Pump Cover Side
Object Number: 820153 Size: LF
(2)Line
(2)Line
(2)Line
(3)Decrease
(4)Converter Feed
(4)Converter Feed
(4)Converter Feed
(5)Release
(6)Apply
(7)Regulated Apply
(7)Regulated Apply
(7)Regulated Apply
(8)To Cooler
(8)To Cooler
(12)Throttle Signal
(12)Throttle Signal
(16)Reverse Clutch
(16)Reverse Clutch
(21)Forward Clutch
(24)TCC Signal
(24)TCC Signal
(32)Coast Clutch
(37)Direct Clutch
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(50)Torque Converter Seal Drain Back
(50)Torque Converter Seal Drain Back
(51)Vent
(51)Vent
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(53)Converter FDL
(53)Converter FDL
Figure 2:

Fluid Pump Cover - Torque Converter Housing Side
Object Number: 820154 Size: LF
(1)Suction
(2)Line
(2)Line
(2)Line
(2)Line
(3)Decrease
(3)Decrease
(3)Decrease
(4)Converter Feed
(4)Converter Feed
(4)Converter Feed
(4)Converter Feed
(5)Release
(5)Release
(6)Apply
(7)Regulated Apply
(7)Regulated Apply
(7)Regulated Apply
(8)To Cooler
(8)To Cooler
(9)Lube
(12)Throttle Signal
(12)Throttle Signal
(16)Reverse Clutch
(16)Reverse Clutch
(21)Forward Clutch
(21)Forward Clutch
(21)Forward Clutch
(24)TCC Signal
(24)TCC Signal
(32)Coast Clutch
(32)Coast Clutch
(37)Direct Clutch
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(51)Vent
(51)Vent
(52)Void
(52)Void
(52)Void
(53)Converter FDL
(53)Converter FDL
Figure 3:

Fluid Pump Cover - Case Side
Object Number: 820157 Size: LF
(1)Suction
(2)Line
(5)Release
(7)Regulated Apply
(8)To Cooler
(9)Lube
(9)Lube
(12)Throttle Signal
(16)Reverse Clutch
(16)Reverse Clutch
(16)Reverse Clutch
(21)Forward Clutch
(21)Forward Clutch
(21)Forward Clutch
(24)TCC Signal
(32)Coast Clutch
(32)Coast Clutch
(32)Coast Clutch
(37)Direct Clutch
(37)Direct Clutch
(37)Direct Clutch
(48)Exhaust
(48)Exhaust
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
Figure 4:

Case - Fluid Pump Cover Side
Object Number: 820158 Size: LF
(2)Line
(7)Regulated Apply
(8)To Cooler
(9)Lube
(12)Throttle Signal
(16)Reverse Clutch
(21)Forward Clutch
(24)TCC Signal
(32)Coast Clutch
(37)Direct Clutch
(40)Automatic Transmission Pressure Test Plug
Figure 5:

Case - Top Channel Plate Side
Object Number: 820159 Size: LF
(2)Line
(7)Regulated Apply
(12)Throttle Signal
(15)Reverse Lockout - RLO
(16)Reverse Clutch
(18)Low and Reverse Clutch or RLO
(21)Forward Clutch
(24)TCC Signal
(30)Second Clutch
(32)Coast Clutch
(34)Second Coast Clutch
(35)Intermediate Clutch
(37)Direct Clutch
(41)Overdrive Clutch
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
Figure 6:

Top Channel Plate - Case Side
Object Number: 820161 Size: MF
(2)Line
(7)Regulated Apply
(12)Throttle Signal
(16)Reverse Clutch
(18)Low and Reverse Clutch or RLO
(21)Forward Clutch
(24)TCC Signal
(30)Second Clutch
(32)Coast Clutch
(34)Second Coast Clutch
(35)Intermediate Clutch
(37)Direct Clutch
(41)Overdrive Clutch
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
Figure 7:

Top Channel Plate - Bottom Channel Plate Side
Object Number: 820162 Size: MF
(2)Line
(2)Line
(2)Line
(7)Regulated Apply
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(12)Throttle Signal
(13)Line Safety Mode
(13)Line Safety Mode
(13)Line Safety Mode
(15)Reverse Lockout - RLO
(15)Reverse Lockout - RLO
(16)Reverse Clutch
(16)Reverse Clutch
(18)Low and Reverse Clutch or RLO
(19)D432
(19)D432
(19)D432
(20)123
(20)123
(21)Forward Clutch
(21)Forward Clutch
(21)Forward Clutch
(21)Forward Clutch
(22)2345
(24)TCC Signal
(27)1-2 Signal
(27)1-2 Signal
(28)2-3 Signal
(28)2-3 Signal
(28)2-3 Signal
(30)Second Clutch
(32)Coast Clutch
(32)Coast Clutch
(32)Coast Clutch
(34)Second Coast Clutch
(35)Intermediate Clutch
(36)345
(37)Direct Clutch
(38)45
(41)Overdrive Clutch
(41)Overdrive Clutch
(42)32
(42)32
(43)32 Safety Mode
(43)32 Safety Mode
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
Figure 8:

Bottom Channel Plate - Top Channel Plate Side
Object Number: 820163 Size: MF
(2)Line
(2)Line
(2)Line
(7)Regulated Apply
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(12)Throttle Signal
(13)Line Safety Mode
(13)Line Safety Mode
(15)Reverse Lockout - RLO
(15)Reverse Lockout - RLO
(16)Reverse Clutch
(16)Reverse Clutch
(18)Low and Reverse Clutch or RLO
(19)D432
(19)D432
(19)D432
(20)123
(20)123
(21)Forward Clutch
(21)Forward Clutch
(22)2345
(24)TCC Signal
(27)1-2 Signal
(27)1-2 Signal
(27)1-2 Signal
(28)2-3 Signal
(28)2-3 Signal
(28)2-3 Signal
(30)Second Clutch
(32)Coast Clutch
(34)Second Coast Clutch
(35)Intermediate Clutch
(35)Intermediate Clutch
(36)345
(37)Direct Clutch
(38)45
(41)Overdrive Clutch
(42)32
(42)32
(43)32 Safety Mode
(43)32 Safety Mode
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(52)Void
(52)Void
Figure 9:

Bottom Channel Plate - Control Valve Body Side
Object Number: 820164 Size: MF
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(7)Regulated Apply
(7)Regulated Apply
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(11)Filtered Feed Limit
(12)Throttle Signal
(13)Line Safety Mode
(13)Line Safety Mode
(15)Reverse Lockout - RLO
(15)Reverse Lockout - RLO
(15)Reverse Lockout - RLO
(15)Reverse Lockout - RLO
(16)Reverse Clutch
(17)Low and Reverse Clutch
(17)Low and Reverse Clutch
(18)Low and Reverse Clutch or RLO
(19)D432
(19)D432
(19)D432
(19)D432
(19)D432
(19)D432
(19)D432
(20)123
(20)123
(21)Forward Clutch
(22)2345
(22)2345
(22)2345
(23)2345 or Reverse
(23)2345 or Reverse
(23)2345 or Reverse
(23)2345 or Reverse
(24)TCC Signal
(24)TCC Signal
(24)TCC Signal
(25)123 Regulated
(25)123 Regulated
(26)123 Braking
(27)1-2 Signal
(27)1-2 Signal
(27)1-2 Signal
(28)2-3 Signal
(28)2-3 Signal
(28)2-3 Signal
(30)Second Clutch
(30)Second Clutch
(32)Coast Clutch
(33)23 Regulated
(34)Second Coast Clutch
(35)Intermediate Clutch
(35)Intermediate Clutch
(36)345
(36)345
(36)345
(36)345
(37)Direct Clutch
(37)Direct Clutch
(37)Direct Clutch
(38)45
(38)45
(38)45
(39)Overdrive Clutch Feed 1
(40)Overdrive Clutch Feed 2
(40)Overdrive Clutch Feed 2
(41)Overdrive Clutch
(42)32
(42)32
(43)32 Safety Mode
(43)32 Safety Mode
(44)FDL
(44)FDL
(45)32 Safety Model FDL
(47)Memory
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(52)Void
(52)Void
(52)Void
(52)Void
Figure 10:

Spacer Plate - Bottom Channel Plate Side
Object Number: 820165 Size: MF
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(2)Line
(7)Regulated Apply
(7)Regulated Apply
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(11)Filtered Feed Limit
(11)Filtered Feed Limit
(12)Throttle Signal
(13)Line Safety Mode
(13)Line Safety Mode
(14)Reverse
(15)Reverse Lockout - RLO
(15)Reverse Lockout - RLO
(15)Reverse Lockout - RLO
(15)Reverse Lockout - RLO
(15)Reverse Lockout - RLO
(15)Reverse Lockout - RLO
(16)Reverse Clutch
(16)Reverse Clutch
(16)Reverse Clutch
(17)Low and Reverse Clutch
(17)Low and Reverse Clutch
(17)Low and Reverse Clutch
(18)Low and Reverse Clutch or RLO
(18)Low and Reverse Clutch or RLO
(19)D432
(19)D432
(19)D432
(19)D432
(19)D432
(19)D432
(19)D432
(19)D432
(19)D432
(20)123
(20)123
(20)123
(20)123
(20)123
(21)Forward Clutch
(21)Forward Clutch
(21)Forward Clutch
(21)Forward Clutch
(21)Forward Clutch
(22)2345
(22)2345
(22)2345
(22)2345
(22)2345
(22)2345
(22)2345
(23)2345 or Reverse
(23)2345 or Reverse
(23)2345 or Reverse
(23)2345 or Reverse
(23)2345 or Reverse
(24)TCC Signal
(24)TCC Signal
(24)TCC Signal
(25)123 Regulated
(25)123 Regulated
(25)123 Regulated
(25)123 Regulated
(25)123 Regulated
(26)123 Braking
(26)123 Braking
(27)1-2 Signal
(27)1-2 Signal
(27)1-2 Signal
(28)2-3 Signal
(28)2-3 Signal
(28)2-3 Signal
(30)Second Clutch
(30)Second Clutch
(30)Second Clutch
(30)Second Clutch
(31)Coast Clutch Feed
(31)Coast Clutch Feed
(32)Coast Clutch
(33)23 Regulated
(33)23 Regulated
(33)23 Regulated
(33)23 Regulated
(33)23 Regulated
(34)Second Coast Clutch
(35)Intermediate Clutch
(35)Intermediate Clutch
(35)Intermediate Clutch
(35)Intermediate Clutch
(36)345
(36)345
(36)345
(36)345
(36)345
(36)345
(37)Direct Clutch
(37)Direct Clutch
(37)Direct Clutch
(37)Direct Clutch
(38)45
(38)45
(38)45
(38)45
(38)45
(39)Overdrive Clutch Feed 1
(39)Overdrive Clutch Feed 1
(39)Overdrive Clutch Feed 1
(40)Overdrive Clutch Feed 2
(40)Overdrive Clutch Feed 2
(40)Overdrive Clutch Feed 2
(40)Overdrive Clutch Feed 2
(41)Overdrive Clutch
(41)Overdrive Clutch
(42)32
(42)32
(43)32 Safety Mode
(43)32 Safety Mode
(43)32 Safety Mode
(44)FDL
(44)FDL
(44)FDL
(44)FDL
(44)FDL
(44)FDL
(45)32 Safety Model FDL
(45)32 Safety Model FDL
(46)Memory Pilot
(47)Memory
(47)Memory
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(54)Accumulator
(54)Accumulator
(54)Accumulator
(54)Accumulator
(54)Accumulator
(54)Accumulator
(54)Accumulator
Figure 11:

Front Control Valve Body - Bottom Channel Plate Side
Object Number: 820166 Size: MF
(2)Line
(2)Line
(2)Line
(7)Regulated Apply
(7)Regulated Apply
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(11)Filtered Feed Limit
(12)Throttle Signal
(13)Line Safety Mode
(15)Reverse Lockout - RLO
(16)Reverse Clutch
(19)D432
(20)123
(23)2345 or Reverse
(23)2345 or Reverse
(24)TCC Signal
(27)1-2 Signal
(28)2-3 Signal
(36)345
(36)345
(36)345
(37)Direct Clutch
(37)Direct Clutch
(37)Direct Clutch
(38)45
(39)Overdrive Clutch Feed 1
(40)Overdrive Clutch Feed 2
(40)Overdrive Clutch Feed 2
(42)32
(43)32 Safety Mode
(46)Memory Pilot
(47)Memory
(47)Memory
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(54)Accumulator
(54)Accumulator
Figure 12:

Rear Control Valve Body - Bottom Channel Plate Side
Object Number: 820167 Size: MF
(2)Line
(2)Line
(2)Line
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(10)Feed Limit
(13)Line Safety Mode
(14)Reverse
(14)Reverse
(15)Reverse Lockout - RLO
(15)Reverse Lockout - RLO
(17)Low and Reverse Clutch
(17)Low and Reverse Clutch
(19)D432
(19)D432
(19)D432
(19)D432
(20)123
(20)123
(21)Forward Clutch
(22)2345
(22)2345
(22)2345
(22)2345
(24)TCC Signal
(25)123 Regulated
(25)123 Regulated
(25)123 Regulated
(25)123 Regulated
(25)123 Regulated
(26)123 Braking
(26)123 Braking
(27)1-2 Signal
(28)2-3 Signal
(28)2-3 Signal
(30)Second Clutch
(30)Second Clutch
(30)Second Clutch
(30)Second Clutch
(31)Coast Clutch Feed
(32)Coast Clutch
(33)23 Regulated
(33)23 Regulated
(33)23 Regulated
(34)Second Coast Clutch
(35)Intermediate Clutch
(35)Intermediate Clutch
(35)Intermediate Clutch
(35)Intermediate Clutch
(36)345
(38)45
(38)45
(39)Overdrive Clutch Feed 1
(40)Overdrive Clutch Feed 2
(42)32
(43)32 Safety Mode
(44)FDL
(44)FDL
(44)FDL
(44)FDL
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(48)Exhaust
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(52)Void
(54)Accumulator