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Cadillac, Seville, SLS, STS, Catera, CTS, Deville, DHS, DTS, Escalade, Escalade EXT, High Mounted Third LED Brake Light Removal Procedures:

Cut the 8 lower fasteners holding the rear compartment lid carpet trim (near license plate area). We will provide you with new fasteners. 

1. Remove the 5 nuts (11mm or 7/16) securing the taillight. 
2. Disconnect electrical connector (blue and black wires). 
3. IMPORTANT: While the deck lid is open and the lid cover is pulled down, look toward the inside corners of the deck lid (same area as nuts) and you should be able to see the white 'christmas tree' clips. You will need to cut these clips off using snippers/wire cutters (Stanley 74-438 works great; a blade from a hacksaw also works well). Try to cut as much of the clip off as possible. Once the clips are cut you should be able to remove the taillight. *See important message and picture below.
4. Do not reuse white 'christmas tree' clips. Do not over tighten nuts. Only snug the nuts to fit the brake light to the deck lid.
   

Open the rear compartment lid.

1. Remove the rear compartment lid trim. Refer to Compartment Lid Trim Replacement - Rear .
2. Remove the backup lamp. Refer to Backup Lamp Replacement .
3. Disconnect the high mounted stoplamp connector (5) from the wiring harness. Press the grommet (4) from the rear compartment lid.
4. Remove the bolts (2) retaining the high mounted stoplamp panel (1) to the rear compartment lid (3).
5. Pull the high mounted stoplamp panel (1) downward to disengage it from the rear compartment lid (3).
6. Remove the high mounted stoplamp panel (1) and place it face down on a clean protective surface.
7. Remove the bolts (1) retaining the high mounted stoplamp (2) to the filler panel (3). 
8. Install the bolts (1) to retain the high mounted stoplamp (2) to the filler panel (3). Tighten the high mounted stoplamp mounting bolts to 2 N·m (18 lb in).
9. Inspect the rear compartment lid (2) to ensure that the upper retainers (1) and the lower retainers (3) are present. If the retainers are damaged they should be replaced.
10. Position the high mounted stoplamp panel (1) to allow the high mounted stoplamp connector (5) and the grommet (4) to pass through the rear compartment lid (3). Ensure that the grommet (4) is fully seated in the rear compartment lid (3). Connect the high mounted stoplamp connector (5) with the wiring harness.
11. Position the high mounted stoplamp panel (1) on the rear compartment lid (3) and press it upwards to engage the locator tabs.
12. Install the bolts (2) to retain the high mounted stoplamp panel (1) to the rear compartment lid (3). Tighten the high mounted stoplamp panel retaining bolts to 2 N·m (18 lb in).
13. Install the backup lamp. Refer to Backup Lamp Replacement .
14. Install the rear compartment lid trim. Refer to Compartment Lid Trim Replacement - Rear .
15. Close the rear compartment lid.

Please note: All 1998- mid 2001 Seville lamps leak water. 100% failure. The current only repair/ fix is to replace the lamp with a mid 2001 or newer replacement. The current replacement GM part is #25697411.

 Open the rear compartment.

1. Remove the compartment lid applique access covers.
2. Remove the rear compartment lid trim panel. Refer to Compartment Lid Trim Replacement - Rear in Body Rear End.
3. Disconnect the bulb socket from the compartment lid applique .
4. Remove the nuts from the compartment lid applique.
5. Remove the compartment lid applique from the rear compartment lid.

Installation Procedure

1. Install the compartment lid applique to the rear compartment lid.

   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.

2. Install nuts to the compartment lid applique . Tighten

   Tighten nuts to the compartment lid applique to 10 N·m (89 lb  in).

3. Connect the bulb socket to the compartment lid applique .
4. Install the rear compartment trim panel. Refer to Compartment Lid Trim Replacement - Rear in Body Rear End.
5. Install the backup lamp access covers.
6. Close the rear compartment.

Open the rear compartment.

1. Remove the rear compartment lid applique. Refer to Compartment Lid Applique Replacement - Rear in Body Rear End.
2. Disconnect the high mounted stop lamp connector from the wiring harness.
3. Remove the fasteners securing the high mounted stop lamp to the rear compartment lid applique.
4. Remove the high mounted stop lamp from the rear compartment lid applique and place it face down on a clean protective surface.

1. Install the high mount stop lamp to the rear compartment lid applique.

   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.

2. Install the fasteners in order to secure the high mounted stop lamp to the rear compartment lid applique. Tighten

   Tighten the high mounted stop lamp fasteners to 6 N·m (53 lb in).

3. Connect the high mount stop lamp electrical connector.
4. Install the rear compartment lid applique to the rear compartment lid. Refer to Compartment Lid Applique Replacement - Rear in Body Rear End.
5. Close the rear compartment.

1. Open the rear compartment lid.
2. Remove the rear compartment sill plate. Refer to Compartment Sill Plate Replacement - Rear in Body Rear End.
3. Pull back on the rear compartment trim panel. 
4. Disconnect the tail lamp electrical connector.
5. Remove the fasteners securing the tail lamp to the body.
6. Remove the tail lamp from the body.

1. Install the tail lamp to the body.

   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.

2. Install the fasteners in order to secure the tail lamp to the body. Tighten

   Tighten the nuts to 6 N·m (53 lb in).

3. Connect the tail lamp electrical connector.
4. Install the rear compartment sill plate. Refer to Compartment Sill Plate Replacement - Rear in Body Rear End.
5. Close the rear compartment lid.

1. Open the rear compartment lid.
2. Lower the rear compartment lid trim. Refer to Compartment Lid Trim Replacement - Rear in Body Rear End. 
   
   
3. Disconnect the high mounted stoplamp connector from the wiring harness.
4. Remove the fasteners retaining the high mounted stoplamp to the rear compartment lid.
5. Remove the high mounted stoplamp and place it face down on a clean protective surface.

1. Install the high mount stoplamp to the rear compartment lid. 
   
   
   

   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.

2. Install the fasteners in order to secure the high mounted stoplamp to the rear compartment lid. Tighten

   Tighten the high mounted stoplamp fasteners to 6 N·m (53 lb in).

3. Connect the high mount stoplamp electrical connector.
4. Install the rear compartment lid trim. Refer to Compartment Lid Trim Replacement - Rear in Body Rear End.
5. Close the rear compartment lid.

2002-2006 Cadillac Escalade SUV High Mounted LED Third Stop Lamp Replacement 

Removal Procedure

1. Raise the lift gate window.
   
2. Remove the retainers (3 screws, near window hinge area) from the stop lamp.
3. Lower the lift gate window. 
   
4. Raise the stop lamp to disconnect the electrical connector from the lamp.
5. Remove the center high-mounted stop lamp from the vehicle.

1. Connect the electrical harness to the stop lamp.
2. Install the center high-mounted stop lamp onto the vehicle.
3. Raise the lift gate window.

   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.
   

4. Install the retainers into the holes. Tighten

   ***Tighten the retainers to 1.2 N·m (10 lb in).***

5. Close the lift gate window.
6. Warning! Do not overtighten screws. Overtighting screws can crack the rear brake light housing. This will create water leaks. There is no warranty coverage for overtightened screws.

2002-2011 Cadillac Escalade EXT High Mounted LED Third Stop Lamp Replacement 

Removal Procedure

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email: logandiagnostic@bellsouth.net

Logan Diagnostic
209 Lighthouse Terrace
Franklin, TN 37064 USA
615. 479. 1900