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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 134 (Automatic Transmission - 6L50/6L80/6L90 - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - On Vehicle >> Manual Shift Shaft Position Switch Replacement

Manual Shift Shaft Position Switch Replacement

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Cadillac Escalade EXT, 2007 Cadillac Escalade ESV, and 2007 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Manual Shift Shaft Position Switch Component View
GM1659825Courtesy of GENERAL MOTORS CORP.
Manual Shift Shaft Position Switch Replacement

Callout Component Name
NOTE: Refer to Fastener Notice .
Fastener Tightening Specifications:  Refer to Fastener Tightening Specifications .

Preliminary Procedures

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the transmission fluid pan and filter. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement .
1 Manual Shift Shaft Position Switch Assembly Electrical Connector
Tip: 
  • Release the connector lock before disconnecting. Engage the connector lock after connecting.
  • The wiring harness clip near the connector does not need to be replaced if broken or missing. The clip is used during manufacturing to keep the wire harness clear during an automated bolt installation process. If the clip is damaged, simply remove and discard.
2 Manual Shift Shaft Position Switch Assembly Bolt

Tighten:  8 N.m (71 lb in)

3 Manual Shift Shaft Position Switch Assembly
Tip: 
  • Align the switch activator slide with the manual valve link.
  • It is recommended that transmission adaptive pressure (TAP) information be reset. Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the engine control module (ECM), powertrain control module (PCM) or transmission control module (TCM) will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned. Reset the TAP values. Refer to Transmission Adaptive Functions .