Radiator & Components for 2021 Cadillac CT4
1. Auxiliary Radiator 
2. Radiator 
3. Block Heater 
4. Upper Baffle Bolt 
5. Upper Baffle Bolt 
6. Upper Baffle Bolt 
7. Upper Bracket Bolt 
8. Reservoir Cap 
9. Reservoir Cap 
10. Reservoir Cap 
11. Reservoir Cap 
12. Reservoir Cap 
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 No.
Part # / Description / Price
Price
1
Charge Air Cooler 
GM
GM Positions: Left
Description: The GM OEM Charge Air Cooler (MPN: 84577608) is an auxiliary intercooler designed for turbocharged and twin-turbocharged Cadillac sedans, specifically engineered for 2.7L turbo and 3.0L twin-turbo engines in CT4 and CT5 models. This genuine General Motors ...
MSRP $352.92
$220.28
MSRP $352.92
$220.28
2
Intercooler Bracket Bolt GM
GM Positions: Left
Notes: PARTS: Part included with auxiliary radiator.
Description: Genuine GM OEM Intercooler Bracket Bolt (MPN: 11547665) designed for turbocharged and supercharged GM engines including 2.0L turbo, 3.6L, and 6.2L variants. This critical fastener secures auxiliary intercooler brackets on select GM vehicles, ensuring prope ...
MSRP $9.03
$6.13
MSRP $9.03
$6.13
3
Driver Side Charge Air Cooler Bracket GM
GM Positions: Left
Description: The Driver Side Charge Air Cooler Bracket (MPN: 84572817) is a genuine GM OEM component engineered for turbocharged and twin-turbo GM engines, including 2.7L turbo and 3.0L twin-turbo applications. This auxiliary charge air cooler bracket maintains optimal ...
MSRP $41.97
$27.26
MSRP $41.97
$27.26
3
Passenger Side Charge Air Cooler Bracket GM
GM Positions: Right
Description: The Passenger Side Charge Air Cooler Bracket (MPN: 84572818) is a genuine GM OEM part engineered for turbo and twin-turbo engines, including 2.7L and 3.0L applications. This auxiliary radiator bracket is designed to securely mount the charge air cooler sys ...
MSRP $44.18
$28.69
MSRP $44.18
$28.69
4
Auxiliary Radiator Lower Insulator GM
GM Positions: Left
Notes: PARTS: Part included with upper bracket.
Description: Genuine GM OEM Auxiliary Radiator Lower Insulator (MPN: 84442203) engineered to protect and insulate your vehicle's auxiliary cooling system from excess heat transfer. This original equipment manufacturer part is designed for turbocharged and twin-turbo GM ...
MSRP $10.70
$7.65
MSRP $10.70
$7.65
5
Auxiliary Radiator Insulator GM
GM Positions: Left
Notes: PARTS: Part included with upper bracket.
Description: # Product Description
Genuine GM OEM Auxiliary Radiator Insulator (MPN: 84442202) designed to regulate engine cooling system temperature across multiple turbocharged powertrains. This authentic General Motors auxiliary radiator insulator fits 2.7L turbo, ...
MSRP $9.80
$7.01
MSRP $9.80
$7.01
6
Charge Air Cooler Upper Insulator GM
GM Positions: Left
Description: The Genuine GM OEM Charge Air Cooler Upper Insulator (MPN: 84593770) is an authentic General Motors replacement part engineered to optimize turbocharger cooling performance in select GM vehicles equipped with 2.7L and 3.0L twin-turbo engines. This auxiliar ...
MSRP $5.44
$3.70
MSRP $5.44
$3.70
7
Nut GM
GM Positions: Left
Description: **Paragraph:**
The GM OEM Nut (MPN: 11546364) is a genuine General Motors fastening component engineered to align and secure critical powertrain and auxiliary system components across multiple GM vehicle platforms. This authentic OEM part ensures precise f ...
$5.92
$5.92
8
Lower Bracket GM
GM Positions: Left
Description: The GM OEM Lower Bracket (MPN: 84849418) is a genuine auxiliary radiator support component engineered for turbocharged GM engines, specifically designed for 2.7L turbo and 3.0L twin-turbo applications. This essential mounting bracket secures auxiliary cool ...
MSRP $55.36
$35.94
MSRP $55.36
$35.94
8
Lower Bracket GM
GM Positions: Right
Description: Genuine OEM GM Lower Bracket (MPN: 84849419) is an auxiliary radiator support component engineered for high-performance turbo engines, including 2.7L turbo and 3.0L twin-turbo powertrains found in select GM vehicles. This OEM bracket assembly provides crit ...
MSRP $73.64
$47.80
MSRP $73.64
$47.80
10
Driver Side Charge Air Cooler Bracket GM
GM Positions: Left
Description: # Product Description
The Driver Side Charge Air Cooler Bracket (MPN: 84572819) is a genuine GM OEM component engineered for 2.7L turbocharged engines and auxiliary cooling systems. This manufacturer-direct part ensures optimal charge air cooler positioni ...
MSRP $18.23
$12.38
MSRP $18.23
$12.38
10
Passenger Side Charge Air Cooler Bracket GM
GM Positions: Right
Description: The Passenger Side Charge Air Cooler Bracket (MPN: 84572820) is a genuine GM OEM component engineered for 2.7L turbocharged engines, providing critical auxiliary support and cooling system stability. This original equipment manufacturer part is precision-d ...
MSRP $18.23
$12.38
MSRP $18.23
$12.38
11
M8x1.25x25 Multi-Purpose Bolt GM
GM Positions: Left
Description: Upgrade your GM vehicle with the genuine OEM M8x1.25x25 Multi-Purpose Bolt (MPN: 11519388), engineered to exact General Motors specifications for reliable fastening across select GM vehicles. This authentic GM part delivers precision threading and durabili ...
MSRP $10.97
$7.45
MSRP $10.97
$7.45
12
Multi-Purpose Nut GM
GM Positions: Left
Description: GM Genuine Multi-Purpose Nut MPN 11546459 is an OEM fastener engineered to meet General Motors' exacting performance standards for select GM vehicles. This authentic replacement part delivers reliable fastening solutions for critical automotive application ...
MSRP $9.68
$6.58
MSRP $9.68
$6.58
13
Driver Side Auxiliary Radiator Front Duct GM
GM Positions: Left
Description: # Product Description
The GM OEM Driver Side Auxiliary Radiator Front Duct (MPN: 84105438) is a genuine General Motors component engineered to optimize cooling performance in select GM vehicles equipped with 3.0L twin-turbo and 2.7L turbo engines. This au ...
MSRP $52.54
$36.05
MSRP $52.54
$36.05
13
Passenger Side Auxiliary Radiator Front Duct GM
GM Positions: Right
Description: The Passenger Side Auxiliary Radiator Front Duct (MPN: 84105439) is a genuine GM OEM part engineered to optimize cooling performance in select GM vehicles equipped with turbocharged engines, including 3.0L twin-turbo and 2.7L turbo models. This auxiliary r ...
MSRP $52.54
$36.05
MSRP $52.54
$36.05
14
Multi-Purpose Retainer (SOLD INDIVIDUALLY) GM
GM Positions: Left
Description: # SEO-Optimized Product Description
Upgrade your vehicle's reliability with the genuine GM OEM Multi-Purpose Retainer (MPN: 11589293), engineered and tested to General Motors' exacting standards. This original equipment manufacturer part is designed to sec ...
MSRP $7.34
$4.98
MSRP $7.34
$4.98
15
Passenger Side Auxiliary Radiator Rear Duct GM
GM Positions: Right
Description: The Passenger Side Auxiliary Radiator Rear Duct (MPN: 84105440) is a genuine GM OEM part engineered to optimize coolant circulation and heat dissipation in select GM vehicles equipped with 2.7L turbo engines. This auxiliary radiator duct maximizes airflow ...
MSRP $45.77
$31.40
MSRP $45.77
$31.40
15
Driver Side Auxiliary Radiator Front Outlet Duct GM
GM Positions: Left
Description: The Driver Side Auxiliary Radiator Front Outlet Duct (MPN: 84105441) is a genuine GM OEM component engineered for 2.7L turbo engines to optimize coolant heat dissipation. This original equipment radiator duct directs airflow through radiator fins with prec ...
MSRP $9.89
$7.10
MSRP $9.89
$7.10