Does this fit on a 2009 chevrolet impala ss v8 5.3 liter ?

I would go to Advance auto website and look up this item and compare the part number to see if it will. It did fit my v8 2006 impala

Is this item actually a 18 psi radiator cap?

Yes. This item is a psi radiator cap.

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ACDelco GM Original Equipment RC111 (15293434) 18 P.S.I. Radiator Cap

ACDelco GM Original Equipment RC111 (15293434) 18 P.S.I. Radiator Cap

Product ID: 25553777

Details

Brand
ACDelco
Color
Black
Exterior Finish
Stainless
Item dimensions L x W x H
2.5 x 2.4 x
Material
Stainless

🔧18 PSI pressure rating

⚙️Universal fit for GM models

🛡️OEM GM quality & durability

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VT6490

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Details

Brand
ACDelco
Color
Black
Exterior Finish
Stainless

Description

🛠️ Keep your engine cool and your ride flawless with GM’s trusted radiator cap!

EASY TWIST ON CLOSURE - Quick, secure installation with no leaks—get back on the road faster.
PRECISION PRESSURE CONTROL - Maintains optimal 18 PSI to boost coolant boiling point and engine efficiency.
GUARANTEED GM COMPATIBILITY - Engineered to fit most GM vehicles perfectly, ensuring seamless installation.
DURABLE STAINLESS STEEL BUILD - Robust construction for long-lasting reliability under extreme conditions.
FACTORY RECOMMENDED REPLACEMENT - Trusted GM original equipment part for peace of mind and vehicle safety.

The ACDelco GM Original Equipment RC111 Radiator Cap is a high-quality, 18 PSI pressure-rated component designed to maintain your GM vehicle’s cooling system efficiency. Made from durable stainless steel, it fits most GM models and meets factory specifications, ensuring reliable performance and safety. Backed by a 24-month unlimited mile warranty, this OEM part guarantees a perfect fit and leak-free operation for worry-free driving.

Specifications

ASIN	B000IZ5E1M
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#193,240 in Automotive ( See Top 100 in Automotive ) #165 in Automotive Replacement Radiator Standard #4,791 in Automotive Replacement Engine Cooling & Climate Control
Brand	ACDelco
Brand Name	ACDelco
Closure Type	Twist-On
Color	Black
Compatible with Vehicle Type	Vehicleâ,Vehicles
Customer Reviews	4.7 out of 5 stars 484 Reviews
Exterior Finish	Stainless Steel
Global Trade Identification Number	00707773127018
Included Components	Radiator Cap
Item Dimensions	2.5 x 2.4 x 1.5 inches
Item Type Name	Radiator Cap
Item Weight	2.24 ounces
Item dimensions L x W x H	2.5 x 2.4 x 1.5 inches
Manufacturer	AC Delco
Manufacturer Part Number	15293434
Manufacturer Warranty Description	24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details.
Material	Stainless Steel
Material Type	Stainless Steel
Model Number	RC111
OEM Equivalent Part Number	15293434
Part Interchange Info	RC111
Style Name	Safety
UPC	707773127018
Unit Count	1.0 Count
Vehicle Service Type	Vehicleâ,Vehicles

Reviews

J**T

12.11.2025

O**N

3.11.2025

N**I

30.12.2025

K**R

1.04.2026

F**N

6.04.2026

J**.

16.08.2025

L**E

15.02.2026

M**N

20.01.2026

A**R

14.04.2026

P**N

6.10.2025

R**N

8.01.2019

D**O

1.01.2026

P**N

3.02.2021

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