Control & Shift Solenoids: Removal

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: DO NOT remove the valve body for the following procedures. Removal of the 1-2 accumulator is necessary only if servicing the pressure control solenoid.

Remove the transmission oil pan and filter. See DRAINING & REFILLING under LUBRICATION.
Remove the 1-2 accumulator if necessary. See ACCUMULATOR ASSEMBLY .
Disconnect the internal wiring harness electrical connectors from the following components:
- Transmission fluid pressure switch (1). See Fig 1 .
- 1-2 shift control solenoid (2).
- 2-3 shift control solenoid (3).
- Pressure control solenoid (4).
- TCC PWM solenoid (5).
- 3-2 control solenoid (6).
Remove the pressure control solenoid retainer. Remove the pressure control solenoid. See Fig 2 .
Remove the 1-2 and 2-3 shift solenoid retainers. Remove the 1-2 and 2-3 shift solenoids. See Fig 3 .
Remove the 3-2 control solenoid retainer. Remove the 3-2 control solenoid. See Fig 3 .

Fig 1: View Of Control & Shift Solenoid Locations

Courtesy of GENERAL MOTORS CORP.

Fig 2: Disassembled View Of Pressure Control Solenoid

Courtesy of GENERAL MOTORS CORP.

Fig 3: Disassembled View Of Shift Solenoids

Courtesy of GENERAL MOTORS CORP.