Radiator & Components for 2026 Cadillac CT4
1. Radiator 
2. Auxiliary Radiator 
3. Upper Baffle Bolt 
4. Upper Baffle Bolt 
5. Upper Baffle Bolt 
6. Upper Bracket Bolt 
7. Reservoir Cap 8. Reservoir Cap 
9. Reservoir Cap 
10. Reservoir Cap 
11. Reservoir Cap 
12. Inter-cooler 
13. Upper Baffle Bolt 
14. Reservoir Cap 
15. Reservoir Cap 
16. Reservoir Cap 
17. Reservoir Cap 
18. Reservoir Cap 
19. Reservoir Cap 
20. Reservoir Cap 
21. Reservoir Cap 
22. Reservoir Cap 
23. Reservoir Cap 
24. Reservoir Cap 
25. Reservoir Cap 
26. Reservoir Cap 27. Air Baffle Retainer No.
Part # / Description / Price
Price
1
Charge Air Cooler 
GM
GM Positions: Left
Description: 2.7L turbo, auxiliary. 3.0L twin-turbo, auxiliary radiator. CT4. CT5. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $352.92
$220.28
MSRP $352.92
$220.28
1
Radiator GM
GM Description: Low temperature. 3.0L twin-turbo, radiator mounted. 3.6L turbo, radiator mounted. CT4. Center. CT5. 6.2L, main.
MSRP $341.67
$224.48
MSRP $341.67
$224.48
2
MSRP $10.39
$7.51
2
MSRP $10.39
$7.51
2
Radiator Lower Bracket GM
GM Positions: Right
Description: Helps align and secure your vehicle's radiator mount
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
Collision parts are designed to help promote proper and safe repair
MSRP $10.39
$7.51
MSRP $10.39
$7.51
3
M8x1.25x50 Multi-Purpose Bolt GM
GM Positions: Left
Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $7.20
$4.92
MSRP $7.20
$4.92
4
Radiator Upper Insulator GM
GM Positions: Left
Description: 2.0L turbo. 2.7L turbo, main. 1.3l turbo. 3.6L. 1.2L. Rear cooling, without auxiliary radiator. Front cooling. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $9.01
$6.49
MSRP $9.01
$6.49
5
Radiator Lower Insulator GM
GM Positions: Left
Description: 2.0L turbo. Radiator & hoses. 2.7L turbo, main. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $9.13
$6.23
MSRP $9.13
$6.23
5
Upper Bracket Lower Insulator GM
GM Positions: Lower
Description: 3.0L twin-turbo, auxiliary radiator. 2.7L turbo, auxiliary. 3.6L turbo, auxiliary. 6.2L, auxiliary.
MSRP $10.70
$7.70
MSRP $10.70
$7.70
6
MSRP $8.30
$6.00
6
MSRP $8.30
$6.00
7
Radiator Drain Petcock GM
GM Notes: PARTS: Part included with radiator.
Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $24.48
$17.63
MSRP $24.48
$17.63
8
Engine Coolant Temperature Sensor GM
GM Description: Helps keep engine running at proper temperature
Alerts vehicle operator of high engine temperature conditions
MSRP $24.53
$14.71
MSRP $24.53
$14.71
10
Multi-Purpose Retainer GM
GM Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $7.34
$5.02
MSRP $7.34
$5.02
11
MSRP $12.77
$9.23
12
Push-Pin GM
GM Notes: PARTS: Part included with lower baffle.
Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $5.05
$3.46
MSRP $5.05
$3.46
13
Driver Side Radiator Air Baffle GM
GM Positions: Left
Description: Helps properly direct airflow
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $55.06
$37.81
MSRP $55.06
$37.81
13
Passenger Side Radiator Air Baffle GM
GM Positions: Right
Description: Helps properly direct airflow
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $14.38
$10.39
MSRP $14.38
$10.39
14
Push-Pin GM
GM Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $8.01
$5.47
MSRP $8.01
$5.47
14
Black Diamond Multi-Purpose Retainer GM
GM Description: Used to secure multiple components
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Collision parts are designed to help promote proper and safe repair
MSRP $10.36
$7.49
MSRP $10.36
$7.49
15
MSRP $12.77
$9.23
16
MSRP $10.18
$7.36
