January 01, 2013

GM 4L80-E Valve Body Identification

Valve Body Xpress

Part Number Chart

Part NumberDescription
GM026 (Warranty Only)'91-'92 with Screw-In Temp Sensor
GM027'92-'96 Temp Sensor in Wire Harness



Look for two small holes on the upper right side of the valve body. The holes do not appear on '97-later units.

The screw in the temperature sensor is only used in 1991. All later years use the temperature sensor located in the internal wiring harness.

The lube hole moved to the location
indicated by the arrow above.
Have a late-style EPC, which can be identified by the silver canister.

Related Units

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