GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Generic 🢒 2003 🢒 Unit Repair 🢒 Transmission/Transaxle 🢒 Automatic Transmission - VT25-E 🢒 Fluid Passages
Figure 1:

Transmission Case Assembly (50) - Case Cover Side Passages
Object Number: 831825 Size: LF
(16)TCC Release - Tier 3
(16)TCC Release - Tier 3
(17)TCC Apply - Tier 2
(23)Drive - Tier 2
(23)Drive - Tier 2
(24)Reverse - Tier 2
(24)Reverse - Tier 2
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(26)Exhaust
(27)Void
(27)Void
Figure 2:

Control Solenoid Valve Assembly (201) - Control Valve Body Assembly Side Passages
Object Number: 831826 Size: MF
(7)Primary Feed Limit
(7)Primary Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(9)VBS Signal - TCC/NI Control
(9)VBS Signal - TCC/NI Control
(10)VBS Signal - Line Control
(10)VBS Signal - Line Control
(10)VBS Signal - Line Control
(11)TCC/NI Enable Signal
(12)Tier 2 Feed
(12)Tier 2 Feed
(13)Line 2
(13)Line 2
(13)Line 2
(13)Line 2
(13)Line 2
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(15)Limited Converter Feed
(15)Limited Converter Feed
(15)Limited Converter Feed
(15)Limited Converter Feed
(19)Clutch Feed
(20)Clutch Control
(21)Clutch Boost
(21)Clutch Boost
(22)Regulated Apply
(22)Regulated Apply
(23)Drive - Tier 2
(23)Drive - Tier 2
(24)Reverse - Tier 2
(24)Reverse - Tier 2
(24)Reverse - Tier 2
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
Figure 3:

Control Valve Body Assembly (207) - Transmission Case Assembly Side Passages
Object Number: 831827 Size: MF
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(4)Bypass
(7)Primary Feed Limit
(7)Primary Feed Limit
(14)Line 2 Limit
(14)Line 2 Limit
(15)Limited Converter Feed
(15)Limited Converter Feed
(16)TCC Release - Tier 3
(17)TCC Apply - Tier 2
(18)Cooler Feed
(18)Cooler Feed
(18)Cooler Feed
(18)Cooler Feed
(23)Drive - Tier 2
(24)Reverse - Tier 2
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
Figure 4:

Control Valve Body Assembly (207) - Control Solenoid Valve Assembly Side Passages
Object Number: 831828 Size: MF
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(4)Bypass
(6)Primary Feed
(6)Primary Feed
(7)Primary Feed Limit
(7)Primary Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(9)VBS Signal - TCC/NI Control
(9)VBS Signal - TCC/NI Control
(10)VBS Signal - Line Conrol
(10)VBS Signal - Line Conrol
(11)TCC/NI Enable Signal
(12)Tier 2 Feed
(12)Tier 2 Feed
(13)Line 2
(13)Line 2
(13)Line 2
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(15)Limited Converter Feed
(15)Limited Converter Feed
(15)Limited Converter Feed
(16)TCC Release - Tier 3
(16)TCC Release - Tier 3
(17)TCC Apply - Tier 2
(17)TCC Apply - Tier 2
(18)Cooler Feed
(18)Cooler Feed
(18)Cooler Feed
(18)Cooler Feed
(19)Clutch Feed
(19)Clutch Feed
(20)Clutch Control
(20)Clutch Control
(20)Clutch Control
(20)Clutch Control
(21)Clutch Boost
(21)Clutch Boost
(21)Clutch Boost
(21)Clutch Boost
(22)Regulated Apply
(22)Regulated Apply
(22)Regulated Apply
(23)Drive - Tier 2
(23)Drive - Tier 2
(24)Reverse - Tier 2
(25)Lube - Tier 3
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
Figure 5:

Control Valve Body Spacer Plate - with Gasket (73) - Transmission Case Assembly Side Passages
Object Number: 831830 Size: MF
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(4)Bypass
(7)Primary Feed Limit
(7)Primary Feed Limit
(14)Line 2 Limit
(14)Line 2 Limit
(16)TCC Release - Tier 3
(17)TCC Apply - Tier 2
(18)Cooler Feed
(23)Drive - Tier 2
(23)Drive - Tier 2
(24)Reverse - Tier 2
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
Figure 6:

Transmission Case Assembly (50) - Torque Converter and Differential Housing Assembly Side Passages
Object Number: 831831 Size: LF
(1)Suction
(16)TCC Release - Tier 3
(16)TCC Release - Tier 3
(17)TCC Apply - Tier 2
(17)TCC Apply - Tier 2
(23)Drive - Tier 2
(23)Drive - Tier 2
(24)Reverse - Tier 2
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(26)Exhaust
(26)Exhaust
(27)Void
(27)Void
Figure 7:

Control Valve Body Spacer Plate - with Gasket (73) - Control Valve Body Side Passages
Object Number: 831832 Size: MF
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(4)Bypass
(7)Primary Feed Limit
(7)Primary Feed Limit
(14)Line 2 Limit
(14)Line 2 Limit
(16)TCC Release - Tier 3
(17)TCC Apply - Tier 2
(18)Cooler Feed
(23)Drive - Tier 2
(23)Drive - Tier 2
(24)Reverse - Tier 2
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
Figure 8:

Control Valve Body Spacer Plate - with Gasket (204) - Control Valve Body Assembly Side Passages
Object Number: 873579 Size: MF
(2)Line 1
(2)Line 1
(2)Line 1
(6)Primary Feed
(6)Primary Feed
(7)Primary Feed Limit
(7)Primary Feed Limit
(7)Primary Feed Limit
(7)Primary Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(9)VBS Signal - TCC/NI Control
(9)VBS Signal - TCC/NI Control
(10)VBS Signal - Line Control
(10)VBS Signal - Line Control
(10)VBS Signal - Line Control
(11)TCC/NI Enable Signal
(12)Tier 2 Feed
(12)Tier 2 Feed
(13)Line 2
(13)Line 2
(13)Line 2
(13)Line 2
(13)Line 2
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(15)Limited Converter Feed
(15)Limited Converter Feed
(15)Limited Converter Feed
(15)Limited Converter Feed
(19)Clutch Feed
(20)Clutch Control
(20)Clutch Control
(21)Clutch Boost
(21)Clutch Boost
(21)Clutch Boost
(21)Clutch Boost
(22)Regulated Apply
(22)Regulated Apply
(22)Regulated Apply
(23)Drive - Tier 2
(23)Drive - Tier 2
(23)Drive - Tier 2
(23)Drive - Tier 2
(24)Reverse - Tier 2
(24)Reverse - Tier 2
(24)Reverse - Tier 2
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
Figure 9:

Control Valve Body Spacer Plate - with Gasket (204) - Control Solenoid Valve Assembly Side Passages
Object Number: 873581 Size: MF
(2)Line 1
(6)Primary Feed
(6)Primary Feed
(7)Primary Feed Limit
(7)Primary Feed Limit
(7)Primary Feed Limit
(7)Primary Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(8)Actuator Feed Limit
(9)VBS Signal - TCC/NI Control
(9)VBS Signal - TCC/NI Control
(10)VBS Signal - Line Control
(10)VBS Signal - Line Control
(10)VBS Signal - Line Control
(11)TCC/NI Enable Signal
(12)Tier 2 Feed
(12)Tier 2 Feed
(13)Line 2
(13)Line 2
(13)Line 2
(13)Line 2
(13)Line 2
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(14)Line 2 Limit
(15)Limited Converter Feed
(15)Limited Converter Feed
(15)Limited Converter Feed
(19)Clutch Feed
(20)Clutch Control
(20)Clutch Control
(21)Clutch Boost
(21)Clutch Boost
(21)Clutch Boost
(21)Clutch Boost
(22)Regulated Apply
(22)Regulated Apply
(22)Regulated Apply
(23)Drive - Tier 2
(23)Drive - Tier 2
(23)Drive - Tier 2
(23)Drive - Tier 2
(24)Reverse - Tier 2
(24)Reverse - Tier 2
(24)Reverse - Tier 2
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
Figure 10:

Transmission Case Cover (97) - Transmission Case Assembly Side Passages
Object Number: 831836 Size: MF
(2)Line 1
(7)Primary Feed Limit
(26)Exhaust
Figure 11:

Transmission Case Cover (97) - Pulley Opening Cover Side Passages
Object Number: 831838 Size: MF
(2)Line 1
(7)Primary Feed Limit
(26)Exhaust
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
Figure 12:

Pulley Opening Covers (114 and 104) - Transmission Case Cover Side Passages
Object Number: 831845 Size: MF
(2)Line 1
(2)Line 1
(7)Primary Feed Limit
(7)Primary Feed Limit
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(104)Variable Drive Pulley Opening Cover
(114)Variable Driven Pulley Opening Cover
Figure 13:

Transmission Case Assembly (50) - Control Valve Body Side Passages
Object Number: 831847 Size: MF
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(2)Line 1
(4)Bypass
(7)Primary Feed Limit
(7)Primary Feed Limit
(7)Primary Feed Limit
(14)Line 2 Limit
(16)TCC Release - Tier 3
(17)TCC Apply - Tier 2
(18)Cooler Feed
(18)Cooler Feed
(23)Drive - Tier 2
(24)Reverse - Tier 2
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(25)Lube - Tier 3
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(26)Exhaust
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void
(27)Void