

🛠️ Keep your GM running cool with precision-engineered pressure control!
The ACDelco GM Original Equipment RC85 Radiator Cap is a vehicle-specific, spring-loaded metal cap designed to maintain 15 PSI pressure in the cooling system. This OEM part raises the coolant boiling point, prevents leaks, and replenishes coolant, ensuring optimal engine performance and longevity for GM vehicles. Trusted for its durability and perfect fit, it offers a cost-effective replacement that meets factory standards.





| ASIN | B000C9S78G |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #14,233 in Automotive ( See Top 100 in Automotive ) #5 in Automotive Replacement Radiator Standard #169 in Automotive Replacement Engine Cooling & Climate Control |
| Brand | ACDelco |
| Color | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,525) |
| Date First Available | November 11, 2005 |
| Exterior Finish | Stainless Steel |
| Global Trade Identification Number | 00021625403168, 20021625403162 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.24 ounces |
| Item dimensions L x W x H | 2.5 x 2.4 x 1.5 inches |
| Item model number | RC85 |
| Manufacturer | AC Delco |
| Manufacturer Part Number | 15042975 |
| Material | Metal |
| Model | ACDelco - 15 P.S.I. Radia (Slp) (RC85) |
| OEM Part Number | 15042975 |
| Product Dimensions | 2.5 x 2.4 x 1.5 inches |
| Style | Safety |
| UPC | 021625403168 781761172440 |
| Vehicle Service Type | Car |
P**L
Perfect fit OEM part
OEM part perfect fit the price was half what auto parts store charge will buy from that vendor again
J**.
Great cap.
Don’t listen to the nons. This cap works fine. Used it on a 2004 gmc canyon with the 3.5L 5cyl. Works great.
F**R
Works well
Perfect replacement cap for the old Buick! Works as intended. Good fit
R**N
I would've thought this would have came with.The radiator was upset that I had to buy it separately
Work perfectly for the radiator
S**.
It fit
It looks like the original and seems to be working
H**S
It’s fine, just not the problem
Thought this was why my car was over heating, it’s not. Still don’t know the problem
T**D
Economical OEM cooling system repair part
Sister's Buick kept losing coolant. No leaks at any expected mechanical point and vehicle passed pressure test. New radiator cap cured the problem. Old 2007 cap O rings were brittle.
E**Z
Good quality
Works amazing for my 05 Impala! 3.4
L**N
PRODUCTO ORIGINAL
A**R
Did a great job looks like the factory original
S**Z
Awesome product
は**ぞ
ハマーh3 3、5リットルのラジエーターにピッタリあいました。
S**I
اصلي
Trustpilot
2 months ago
5 days ago