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9th generation of Chevrolet's full sized SUV, based on the GM GT800 platform.

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Why is rear access open light on when door is closed

Rear access open warning comes on driver notice screen when door is closed. also interior lights come on

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@louis1 there are some sensor in the latch assembly that could register your access as being open. It's a pretty involved task so try to reset your computer first. Disconnect the battery cable and for a few minutes keep holding the battery cables together. I prefer to leave them disconnected overnight and reattach those later. this should force your computer to relearn. If that does not work your have to take a look at the latch assembly. Last it could be that the BCM (Body Control Module) is failing, or has corrosion or loose wire on one of the connectors. Check on those as well

This should work for your Suburban:

Liftgate Trim Panel Replacement

Removal Procedure

Remove upper trim panel. Refer to Liftgate Garnish Molding Replacement .

Pry gently with a thin-bladed tool in order to release the clips.

Slide the trim panel upward to disengage mounting hooks.

Remove the trim panel from the liftgate.

Installation Procedure

Position the trim panel to vehicle.

Slide the trim panel downward to engage mounting hooks.

Install the upper trim panel. Refer to Liftgate Garnish Molding Replacement .

Install the pull strap.

Door Lock Actuator Replacement (Liftgate)

Removal Procedure

Remove the upper and lower trim panels. Refer to Liftgate Trim Panel Replacement .

Disconnect the electrical connectors.

Remove the cables attached to actuator assembly.

Remove the bolts from the latch actuator.

Remove the actuator from the liftgate.

Remove the liftgate lock cylinder. Refer to Liftgate Lock Cylinder Replacement .

Installation Procedure

Install the liftgate lock cylinder. Refer to Liftgate Lock Cylinder Replacement .

Install the actuator to the liftgate.

Loose assemble the bolts to the latch actuator.

Close the liftgate glass in order to adjust the actuator.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Install the cables to actuator assembly.

Tighten

Tighten the bolts to 9 N·m (80 lb in).

Connect the electrical connectors.

Install the upper and lower trim panels. Refer to Liftgate Trim Panel Replacement .

Liftgate Latch Replacement

Removal Procedure

Remove the latch assembly bolts.

Remove the latch assembl from the liftgate.

Remove the electrical connector.

Remove the cable at latch.

Installation Procedure

Install the liftgate lock cylinder to the latch assembly.

Rotate lock cylinder clockwise until the pin engages.

Install the trim panel. Refer to Liftgate Trim Panel Replacement .

Install the liftgate window latch assembly. Refer to Liftgate Latch Replacement .

Remove the trim panel. Refer to Liftgate Trim Panel Replacement .

Remove the liftgate window latch assembly. Refer to Liftgate Latch Replacement .

Depress the locking pin on the lock cylinder.

Turn lock cylinder counterclockwise.

Remove the liftgate lock cylinder from the latch assembly.

Install the cable at the latch.

Install the electrical connector.

Install the latch assembly to the liftgate.

Notice: Refer to Fastener Notice in the Preface section.

Install the latch assembly bolts.

Tighten

Tighten the bolts to 25 N·m (18 lb ft).

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I read through all this and opened and closed all the doors looking at the DIC to see that they were properly sensed. Did the same with the rear hatch but did not look at the DIC when hatch was opened. I started planning to take the Suburban to the dealer to troubleshoot the problem and my wife noticed air noise coming from somewhere. I pulled over into a parking lot, looked at the rear hatch which was firmly closed, cycled the hatch anyway... still no change. Then, happened to note that the rear window was open about an inch. Pushed the window closed and alas! The problem went away. I would have found the problem a lot faster if the DIC had indicated "Rear Window Open" rather than "Rear Access Open".

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Louis さん、ありがとうございました!
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