Seat belt replace fron seat belt buckle. How do I remove plastic trim to access mounting bolt for buckle.

Preliminary Procedures
Remove the rear seat. Refer to Rear Seat Replacement.
Remove the left quarter lower trim panel. Refer to Quarter Lower Rear Trim Panel Replacement.


Preliminary Procedure
Remove the rear compartment floor stowage compartment tray. Refer to Rear Floor Trim Plate Replacement.
1
Rear Seat Nut (Qty: 6)
Caution: Refer to Fastener Caution in the Preface section.
Tip
Roll the seat forward enough to get access to the nut that attaches the center seat belt assembly to the floor.
Tighten
45 N·m (33 lb ft)
2
Rear Seat Bolt (Qty: 3)
Tip
• Adjust the seat forward or rearward to access the bolts.
• Remove the plastic trim pieces to gain access to the nuts.
Tighten
45 N·m (33 lb ft)
3
Rear Seat Assembly

Preliminary Procedures
Remove the quarter upper trim finish panel. Refer to Quarter Upper Trim Panel Replacement.
Remove the rear compartment trim panel. Refer to Rear Compartment Trim Panel Replacement.
Remove the floor trim plate. Refer to Rear Floor Trim Plate Replacement.
1
Quarter Lower Trim Finish Retainer (Qty: 2)
2
Quarter Lower Trim Finish Panel Assembly
Caution: Refer to Fastener Caution in the Preface section.
Procedure
Remove the cargo tie down loop anchor plates and bolts.
Remove the rear passenger seat belt guide.
Disconnect the rear passenger seat belt so that the trim panel can be removed around the seat belt. Refer to Rear Seat Belt Replacement.
Pull the trim panel toward the inside of the vehicle to disengage the retainers.
Tighten
9 N·m (80 lb in)
3
Quarter Lower Trim Finish Panel Retainer (Qty: 5)

Rear Seat Replacement

Callout

Component Name
Notice: Refer to Fastener Notice in the Preface section.
Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .
Preliminary Procedure Remove the rear compartment floor stowage compartment tray. Refer to Rear Floor Trim Plate Replacement .
1
Nut, Rear Seat (Qty: 6)
Tip
Roll the seat forward enough to get access to the nut that attaches the center seat belt assembly to the floor.
Tighten
45 N?·m (33 lb ft)
2
Bolt, Rear Seat (Qty: 3)
Tip

1. Adjust the seat forward or rearward to access the bolts.
2. Remove the plastic trim pieces to gain access to the nuts.

Tighten
45 N?·m (33 lb ft)
3
Rear Seat Assembly

Slide seat back all the way. Remove front mounting bolts (sometimes hidden by plastic trim). Move seat all the way forward, remove bolts at rear. It may also have a wiring connector to disconnect, and seat belts may need to be un bolted fro floor and side pillars.

I don't know if this is something you want to get into? You decide. Front Seat Belt Replacement SRS components are located in this area. Review the SRS component locations and the precautions and procedures before performing repairs or service.
NOTE: Check the front seat belts for damage, and replace them if necessary.

Front Seat Belt

1. Make sure you have the anti-theft code for the radio, and then write down the frequencies for the preset buttons.
2. Disconnect the negative cable from the battery, and wait at least 3 minutes before beginning work.
3. Slide the front seat forward fully.

1. Pull the lower anchor cover (A) back, and remove the lower anchor bolt (B).
2. Remove the B-pillar lower trim panel.

1. Remove the upper anchor cover (A), and remove the upper anchor bolt (B).

1. Disconnect the seat belt tensioner connector (A), and detach the harness clip (B) from the retractor (C). Remove the upper retractor mounting bolt (D), and the lower retractor bolt (E), then remove the front seat belt (F) and retractor.
2. If necessary, remove the front seat belt protector (G).
3. Remove the B-pillar upper trim.

1. Remove the shoulder anchor adjuster (A).

1. Install the seat belt in the reverse order of removal, and note these items:
   • Assemble the washers, collar, and bushing on the upper and lower anchor bolts as shown.
   • Check that the retractor locking mechanism functions.
   • Apply liquid thread lock to the anchor bolts before reinstallation.
   • If the seat belt tensioner has been activated, replace the front seat belt protector with a new one.
   • Before installing the anchor bolts, make sure there are no twists or kinks in the seat belt.
   • Make sure the seat belt tensioner connector is plugged in properly.
   • Reconnect the negative cable to the battery.
   • Enter the anti-theft code for the radio, and then enter the customer's radio station presets.
   • Reset the clock.
   • Do the PCM idle learn procedure and the power window control unit reset procedure.

Upper anchor bolt installation
Lower anchor bolt installation

Seat Belt Buckle

1. Make sure you have the anti-theft code for the radio, and then write down the frequencies for the preset buttons.
2. Disconnect the negative cable from the battery, and wait at least 3 minutes before beginning work.
3. Remove the front seat.
4. If equipped, remove the center table.
5. Remove the under seat storage box.
6. Remove the center cover, driver's, passenger's.

1. Driver's: If equipped with seat heater, remove the harness band (A), and disconnect the seat subharness connector (B). If equipped without seat heater, detach the seat belt switch connector clip (C). Detach the seat belt buckle tensioner clip (D), and harness clip (E).

Your question isn't stating what kind of car you have, but to remove the seat in car or truck if you have bucket seats, it should only be 4 bolts and a wiring harness. There may be small plastic caps over the bolts. Once you get the seat unbolted be sure to find the wires and just unplug the connector. The seatbelt should only be one bolt, but may be a torx (star) bit. Bench seats have the same concept, but you have to unbolt both passenger and drivers side to remove them. Seats aren't too heavy either. Look heavy, but usually not in newer vehicles.

from autozone.com:

Removal & Installation

1. Disconnect and isolate the negative battery cable.
2. Remove the right quarter trim panel as follows:
   1. Remove first rear seat. Remove the second rear seat, if equipped.
   2. Remove the sliding door sill plate.
   3. Remove the quarter trim bolster.
   4. Remove the upper C-pillar trim and D-pillar trim panel.
   5. Remove the first and second rear seat belt anchors.
   6. Remove the screws securing the quarter trim to quarter panel from the bolster area.
   7. Remove the screws securing the rear edge of the quarter trim to the support bracket.
   8. Carefully disengage the hidden clips securing the front of the quarter trim to the quarter panel just rearward of the sliding door opening.

   
   

Fig. Removing the trim panel to access the rear blower motor

i. Disconnect the wiring harness connector from the accessory power outlet, if equipped.

j. On long wheelbase wagons only, remove the quarter trim from the quarter panel and pull second rear seat belt through access hole.

k. Pull first rear seat belt through the access hole.

l. Remove the quarter trim panel from the vehicle.

3. Remove the 5 screws mounting the A/C-heater blower motor housing to the rear HVAC unit (one mounting screw located on evaporator cover).

4. Twist the blower motor out of scroll housing.

5. Disconnect the blower motor wiring connector.

6. Remove the blower motor from vehicle.


Fig. The rear blower motor is held in place by four screws
To install:

1. Install the blower motor unit into the vehicle.
2. Reconnect the blower motor wiring connector.
3. Secure the blower motor into scroll housing.
4. Install and tighten the 5 screws mounting the A/C-heater blower motor housing to the rear HVAC unit (one mounting screw located on evaporator cover).
5. Install the right quarter trim panel as follows:
   1. Install the quarter trim panel in position in the vehicle.
   2. Insert and pull the first rear seat belt through the access hole in quarter trim panel.
   3. On long wheelbase wagons only, insert and pull the second rear seat belt through access hole in quarter trim panel.
   4. Reconnect the wiring harness connector to the accessory power outlet, if equipped.
   5. Engage the hidden clips to secure the front of quarter trim to quarter panel rearward of sliding door opening.
   6. Install the retaining screws that secure the rear edge of quarter trim to support bracket.
   7. Install the retaining screws that secure the quarter trim to the quarter panel in bolster area.
   8. Install the second rear seat belt anchor (if equipped), and the first rear seat belt anchor.
   9. Install the D-pillar trim panel and upper C-pillar trim.
   10. Install the quarter trim bolster.
   11. Install the sliding door sill plate.
   12. Install the second rear seat, if equipped, and install the first rear seat.
       
6. Reconnect the negative battery cable. Check blower motor operation.

Removal & Installation

1. Disconnect and isolate the negative battery cable.
2. Remove the right quarter trim panel as follows:
   1. Remove first rear seat. Remove the second rear seat, if equipped.
   2. Remove the sliding door sill plate.
   3. Remove the quarter trim bolster.
   4. Remove the upper C-pillar trim and D-pillar trim panel.
   5. Remove the first and second rear seat belt anchors.
   6. Remove the screws securing the quarter trim to quarter panel from the bolster area.
   7. Remove the screws securing the rear edge of the quarter trim to the support bracket.
   8. Carefully disengage the hidden clips securing the front of the quarter trim to the quarter panel just rearward of the sliding door opening.
      
      
      

      Fig. Removing the trim panel to access the rear blower motor
      

   9. Disconnect the wiring harness connector from the accessory power outlet, if equipped.
   10. On long wheelbase wagons only, remove the quarter trim from the quarter panel and pull second rear seat belt through access hole.
   11. Pull first rear seat belt through the access hole.
   12. Remove the quarter trim panel from the vehicle.
       
3. Remove the 5 screws mounting the A/C-heater blower motor housing to the rear HVAC unit (one mounting screw located on evaporator cover).
4. Twist the blower motor out of scroll housing.
5. Disconnect the blower motor wiring connector.
6. Remove the blower motor from vehicle.
   
   
   

   Fig. The rear blower motor is held in place by four screws
   

To install:

1. Install the blower motor unit into the vehicle.
2. Reconnect the blower motor wiring connector.
3. Secure the blower motor into scroll housing.
4. Install and tighten the 5 screws mounting the A/C-heater blower motor housing to the rear HVAC unit (one mounting screw located on evaporator cover).
5. Install the right quarter trim panel as follows:
   1. Install the quarter trim panel in position in the vehicle.
   2. Insert and pull the first rear seat belt through the access hole in quarter trim panel.
   3. On long wheelbase wagons only, insert and pull the second rear seat belt through access hole in quarter trim panel.
   4. Reconnect the wiring harness connector to the accessory power outlet, if equipped.
   5. Engage the hidden clips to secure the front of quarter trim to quarter panel rearward of sliding door opening.
   6. Install the retaining screws that secure the rear edge of quarter trim to support bracket.
   7. Install the retaining screws that secure the quarter trim to the quarter panel in bolster area.
   8. Install the second rear seat belt anchor (if equipped), and the first rear seat belt anchor.
   9. Install the D-pillar trim panel and upper C-pillar trim.
   10. Install the quarter trim bolster.
   11. Install the sliding door sill plate.
   12. Install the second rear seat, if equipped, and install the first rear seat.
       
6. Reconnect the negative battery cable. Check blower motor operation.

Hope helps (remember to rate this).

This rtequires seat removal in order to gain acces to the buck side mounting bolt

please don't forget to rate, thx.

Retractor and Tongue—Sedan
SPECIAL SERVICE TOOL(S) REQUIRED Description Tool Number Safety Belt Bolt Bit T77L-2100A
NOTE: Safety Belt Bolt Bit T77L-2100-A should be used for safety belt removal and installation.

Removal

1. Remove rear seat cushion. Refer to Section 01-10 .
   

Seat Cushion, Rear Sedan
Removal

1. Apply knee pressure to lower front portion of the rear seat cushion. Push rearward to disengage rear seat cushion pad and frame (600A88) from rear seat cushion front retainers (63370).
   

1. Remove rear seat cushion from vehicle.
   

1. Remove rear seat back. Refer to Section 01-10 .
   

Seat Back, Rear 60/40 Split Bench—Sedan
Removal

1. NOTE: Safety belt bolts do not secure seat back to vehicle.
   
   Remove rear seat cushion as described.
   

1. Fold down back seat and remove two bolts in the center of each seat back striker plates.
   

1. Remove two bolts from outboard rear seat back frame retaining brackets.
   

1. Lift seat back up and pull forward to remove from vehicle.
   

1. Remove panel (52018) and quarter trim panel (31012). Refer to Section 01-05 .
   

Trim Panel, Quarter—Sedan Removal

1. Remove rear seat. Refer to Section 01-10 .
   

1. Pull up on rear section of rear door scuff plate that overlaps lower quarter trim panel.
   

1. Pull lower quarter trim panel away from body.
   

1. Remove safety belt retaining bolt.
   

1. Feed safety belt through lower quarter trim panel.
   

1. Remove safety belt anchor plate-to-sill bolt from quarter panel.
   

1. Remove retractor anchor nut and retractor from rear quarter panel.
   

1. Remove upper seat belt anchor bolt and anchor from upper rear quarter panel.
   

1. Slide anchor plate end of safety belt through the openings in the quarter trim panel.
   

1. Remove outboard front safety belt retractor and tongue (611B08) from the vehicle.
   
   
   
   
   
   Item Part Number Description 1 386277-S190 Bolt (Part of 611B68) 2 31012 Upper Rear Quarter Trim Panel 3 611B60 Retractor and Tongue 4 N800937-S190 Nut 5 389370-S190 Bolt 6 — Rear Quarter Panel (Part of Body) 7 52018 Lower Rear Quarter Trim Panel 8 — Mounting Stud (Part of Body)

1. Remove seat belt anchor bolt and retractor and tongue from rear deck panel.
   
   
   
   
   

Installation

1. To install, reverse Removal procedure.
   

1. Make sure the safety belt webbing is not twisted. If it is, remove the twist.
   

1. Tighten retractor anchor bolt and safety belt anchor plate-to-sill bolt to 34-46 Nm (25-33 lb-ft).
   

1. Check the restraint system for proper operation.
   

Hi Xit.....The factory XM module is in fact located under the rear shelf trim panel. You will have to remove the rear seat cushion, just pull up on the front of the cushion about 12 inches in from left and right corners. Remove the cushion from the car. Open the trunk and remove nuts located on the seat back just under rear shelf metal. Back inside the rear seat area, remove the seat belt buckle bolts located inboard of right and left lower corners of the seat back. Remove the seat back. You will now be able to see the (2) plastic fir tree pins that hold the shelf panel trim in place. Remove the pins.
Now comes the hard part, remove the right and left quarter sail interior trim panels ( Caution: roof rail air bag located behind right and left panels) the fasteners are located behind the "SIR" plastic buttons in the sail panel trim.
All in all, unless you have the proper tools and take the proper precautions, you might want to take your Cadillac to your local dealer.
Buy the way, is there something wrong with your factory XM module?
Let me know, regards.