Brackets, Flanges & Hangers for 2021 Cadillac XT4
1. Rail Assembly 
2. Apron Assembly 
3. Fender 
4. Upper Rail 
5. Rear Floor Pan 
6. Inner Hinge Pillar 
7. Uniside Assembly 
8. Engine Cradle 
9. Headrest 
10. Upper 
11. Headliner 
12. Steering Wheel 
13. Carrier 
14. Door Trim Panel 
15. Door Trim Panel 
16. Headrest 
17. Bumper Cover 
18. Headrest 
19. Cowl Grille 
20. Headrest 
21. Rear Body Panel 
22. Center Console 
23. Trailer Hitch 
24. Rear 
25. Headrest 
26. Fuel Door 
27. Bumper Cover 
28. Headrest 
29. Headrest 
30. Headrest 31. Seat Trim Panel Bracket No.
Part # / Description / Price
Price
1
Passenger Side Front Compartment Side Rail 
GM
GM Positions: Right
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $1,405.29
$922.75
MSRP $1,405.29
$922.75
2
Driver Side Front Engine Compartment Inner Rail Extension GM
GM Positions: Left
Notes: PARTS: Part included with rail assembly.
Description: Lower rail. Front center. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $80.03
$54.96
MSRP $80.03
$54.96
2
Passenger Side Front Compartment Inner Side Rail Extension GM
GM Positions: Right
Notes: PARTS: Part included with rail assembly.
Description: Lower rail. Front center. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $80.03
$54.96
MSRP $80.03
$54.96
3
Rail Assembly Upper Reinforced GM
GM Positions: Left
Notes: PARTS: Part included with rail assembly.
Description: 2021-23, lower rail. 2024-26, lower rail.
MSRP $31.13
$22.50
MSRP $31.13
$22.50
3
Rail Assembly Upper Reinforced GM
GM Positions: Right
Notes: PARTS: Part included with rail assembly.
Description: 2021-23, lower rail. 2024-26, lower rail.
MSRP $13.03
$9.42
MSRP $13.03
$9.42
4
Driver Side Front Compartment Side Rail GM
GM Positions: Left
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $565.06
$371.04
MSRP $565.06
$371.04
4
Passenger Side Front Compartment Side Rail GM
GM Positions: Right
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $649.76
$426.65
MSRP $649.76
$426.65
5
Outer Rail Bracket GM
GM Positions: Left
Notes: PARTS: Part included with outer rail.
Description: 2021-23, lower rail. 2024-26, lower rail.
MSRP $26.61
$18.22
MSRP $26.61
$18.22
5
Passenger Side Brake Hose Bracket GM
GM Positions: Right
Notes: PARTS: Part included with outer rail.
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $47.13
$26.88
MSRP $47.13
$26.88
6
Front Passenger Side Wheelhouse Panel Extension GM
GM Positions: Right
Description: Front outer. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $87.17
$58.29
MSRP $87.17
$58.29
6
$50.02
7
Driver Side Front Compartment Inner Side Rail Extension GM
GM Positions: Left
Description: Lower rail, front inner. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $403.99
$266.49
MSRP $403.99
$266.49
7
Rail Extension GM
GM Positions: Right
Description: 2021-23, lower rail, front inner. 2024-26, lower rail, front inner.
MSRP $403.99
$266.49
MSRP $403.99
$266.49
8
Driver Side Floor Panel Number 1 Cross Bar Reinforcement GM
GM Positions: Left
Description: Center-lower. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $21.46
$15.52
MSRP $21.46
$15.52
8
Passenger Side Floor Panel Number 1 Cross Bar Extension GM
GM Positions: Right
Description: Center-lower. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $19.49
$14.09
MSRP $19.49
$14.09
9
Driver Side Front Compartment Outer Side Rail Extension GM
GM Positions: Left
Description: Lower rail, side upper. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $88.98
$59.50
MSRP $88.98
$59.50
9
MSRP $40.54
$27.84
10
Driver Side Front Compartment Side Rail Rear Extension GM
GM Positions: Left
Description: Lower rail, side lower. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $81.36
$55.87
MSRP $81.36
$55.87
10
Rail Extension GM
GM Positions: Right
Description: 2021-23, lower rail, side lower. 2024-26, lower rail, side lower.
MSRP $78.80
$54.12
MSRP $78.80
$54.12
11
Driver Side Front Compartment Front Side Rail Reinforcement GM
GM Positions: Left
Description: Lower rail, #1. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $28.50
$20.60
MSRP $28.50
$20.60
11
Passenger Side Front Compartment Front Side Rail Reinforcement GM
GM Positions: Right
Description: Lower rail, #1. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $10.39
$7.51
MSRP $10.39
$7.51
12
Driver Side Front Compartment Front Side Rail Reinforcement GM
GM Positions: Left
Description: Lower rail, #2. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $81.87
$56.22
MSRP $81.87
$56.22
12
Passenger Side Front Compartment Front Side Rail Reinforcement GM
GM Positions: Right
Description: Lower rail, #2. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $37.32
$25.63
MSRP $37.32
$25.63
13
Driver Side Front Compartment Side Rail Rear Reinforcement GM
GM Positions: Left
Description: Lower rail, #3. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $21.08
$15.24
MSRP $21.08
$15.24
13
Rail Assembly Lower Reinforced GM
GM Positions: Right
Description: 2021-23, lower rail, #3. 2024-26, lower rail, #3.
MSRP $17.68
$12.78
MSRP $17.68
$12.78