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Home >> Hummer >> 2007 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 1159 (Automatic Transmission - 6L50/6L80/6L90 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information and Procedures >> Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test >> Preliminary Procedures

Preliminary Procedures

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  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 .
  3. Remove the transmission electrical connector. Refer to Automatic Transmission Electrical Connector Passage Sleeve Replacement .
  4. Remove the control solenoid (w/body and TCM) valve assembly from the transmission. Refer to Control Valve Lower Body and Upper Body Replacement .
Fig 1: Solenoid Testing Procedure
GM1690103Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Regulated Air Supply
2 Test Ports
3 Scan Tool
4 Test Pressure Gage
5 Electrical Connector Sleeve