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Opening the Endgate When There Is an Electrical Failure Removal Procedure 1. Lower the end gate window out of the roof rear header seal. 2. Remove the end gate trim panel. 3. Remove the end gate inner reinforcement panel. 4. Locate the manual release lever (1), located on the upper and lower left latches (2). 5. Slide the manual release levers (1) upward to swing open the end gate. 6. Diagnose and repair the end gate latches. Installation Procedure 1. Install the end gate inner reinforcement panel. 2. Install the end gate trim panel. 3. Check for proper operation of the end gate latches and window.

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Models: 2008-2009 Chevrolet Colorado, TrailBlazer 2008-2009 GMC Canyon, Envoy 2008-2009 HUMMER H3, H3T 2008-2009 Saab 9-7X All Equipped With Engine RPOs LLR, LLV, LL8 Please Refer to GMVIS Condition Some customers may comment that the malfunction indicator lamp (MIL) is illuminated. Some customers may also comment that the engine runs rough. The technician may find DTCs P0300, P0301, P0302, P0303, P0304, P0305, or P0306 set as current or in history, depending on which engine the vehicle is equipped with. Upon further examination, the technician may observe evidence of water intrusion into the spark plug recess area. Cause This condition may be caused by an engine being exposed to a large quantity of water, which may result in some of the water seeping down past the vented threads of an ignition coil bolt, then flowing through the vent opening that is located in the bottom of the related ignition coil bolt hole, and collecting in the spark plug recess area. Correction Important: DO NOT reprogram or replace the engine control module (ECM) for this condition. If evidence of water intrusion in the spark plug recess area/s is not observed, then refer to the appropriate DTC procedures in SI.

repair manual covers Chevrolet Trailblazer and Trailblazer EXT, GMC Envoy and Envoy XL, and Oldsmobile Bravada; 2WD & 4WD models with inline 6-cylinder engines. 2002-2003 US and Canadian models.
What’s Inside?
Introduction: About this manual | Introduction | Vehicle identification numbers | Maintenance techniques, tools and working facilities | Buying parts | Jacking and towing | Anti-theft audio system | Booster battery (jump) starting | Conversion factors | Automotive chemicals and lubricants | Safety first! | Troubleshooting
* Tune-up and routine maintenance
* In-line 6-cylinder engine
* Engine and overhaul procedures
* Cooling, heating and air-conditioning systems
* Fuel and exhaust systems
* Engine electrical systems
* Emissions and engine control systems
* Automatic transaxle, transfer case
* Driveline
* Brakes
* Suspension and steering systems
* Body
* Chassis electrical system
* Wiring diagrams

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Condition Some customers may comment on erratic operation of the speedometer. Others may comment that the speedometer needle shakes above 96 km/h (60 mph). Cause This condition may be caused by a loose or poor connection at Powertrain Control Module/Engine Control Module (PCM/ECM) ground G108. Correction Technicians are to inspect and repair ground G108 as necessary. Refer to callout 1 in the illustration above for the location of G108. Refer to the Testing for Intermittent Conditions and Poor Connections and the Wiring Repair procedures in SI for more information. Warranty Information (excluding Saab U.S. Models)

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1. Disconnect the accelerator pedal position (APP) sensor electrical connector. 2. Remove the APP sensor retaining fasteners. 3. Remove the APP sensor (2) from the vehicle. INSTALLATION PROCEDURE 1. Install the APP sensor (2) to vehicle. 2. Install the APP sensor retaining fasteners (1). NOTE: Refer to Fastener Notice in Service Precautions. Tighten Tighten the retaining fasteners to 10 N.m (89 lb in) . 3. Connect the APP sensor electrical connector.