---
product_id: 6638756
title: "ACDelco GM Original Equipment RC85 (15042975) 15 P.S.I. Radiator Cap"
brand: "acdelco"
price: "A$35"
currency: AUD
in_stock: true
reviews_count: 13
category: "Ac Delco"
url: https://www.desertcart.com.au/products/6638756-acdelco-gm-original-equipment-rc85-15042975-15-p-s-i
store_origin: AU
region: Australia
---

# 15 PSI pressure rating Vehicle-specific GM fit OEM quality & durability ACDelco GM Original Equipment RC85 (15042975) 15 P.S.I. Radiator Cap

**Brand:** acdelco
**Price:** A$35
**Availability:** ✅ In Stock

## Summary

> 🛠️ Keep your GM running cool with precision-engineered pressure control!

## Quick Answers

- **What is this?** ACDelco GM Original Equipment RC85 (15042975) 15 P.S.I. Radiator Cap by acdelco
- **How much does it cost?** A$35 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/6638756-acdelco-gm-original-equipment-rc85-15042975-15-p-s-i)

## Best For

- acdelco enthusiasts

## Why This Product

- Trusted acdelco brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Tailored GM Fit:** Engineered specifically for GM vehicles ensuring seamless installation and perfect compatibility.
- • **Enhanced Cooling Safety:** Seals the radiator to prevent leaks and replenishes coolant for consistent engine protection.
- • **Trusted OEM Reliability:** ACDelco original equipment guarantees factory-level durability and performance.
- • **Precision Pressure Control:** Maintains optimal 15 PSI to boost coolant boiling point and engine efficiency.
- • **Cost-Effective Genuine Part:** OEM quality at a fraction of dealership prices—smart maintenance without compromise.

## Overview

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.

## Description

An ACDelco GM Original Equipment Radiator Cap is a spring loaded cap that seals the radiator filler neck or surge tank, and is a GM-recommended replacement for your vehicle’s original component. It maintains pressure on the cooling system while the engine is operating, which raises the boiling point of the engine coolant. It also replenishes the system with coolant from the expansion tank (if equipped) when the engine cools off. This original equipment radiator cap has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Review: Perfect fit OEM part - OEM part perfect fit the price was half what auto parts store charge will buy from that vendor again
Review: 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.

## Features

- Seal and maintain pressure on the cooling system for vehicle safety
- Raise the boiling point of the engine coolant to maintain efficiency
- Fit most models of gm vehicles for expanded coverage
- GM recommended replacement part for your gm vehicle’s original factory component
- Offering the quality, reliability, and durability of gm oe
- Fit type: Vehicle Specific

## Technical Specifications

| Specification | Value |
|---------------|-------|
| 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 |

## Product Details

- **Brand:** ACDelco
- **Color:** Black
- **Exterior Finish:** Stainless Steel
- **Item dimensions L x W x H:** 2.5 x 2.4 x 1.5 inches
- **Material:** Metal

## Images

![ACDelco GM Original Equipment RC85 (15042975) 15 P.S.I. Radiator Cap - Image 1](https://m.media-amazon.com/images/I/619IxyK6bmL.jpg)

## Questions & Answers

**Q: Does it 2015 gmc yukon xl denali**
A: Cap Asm-Rad Fil - GM (13502354)

**Q: Will this fit an 07 Grand Prix Base?**
A: yes

**Q: Does it have a spring on it**
A: Never be fooled by GM "Original Equipment". It is NEVER the O.E. part that came on your vehicle from the factory. No matter if it is a radiator cap, a fan clutch, a water pump, whatever. If it is labeled/described as a GM "Original Equipment" part, it will either be made in Mexico, China, or sourced from another nonGM affiliated manufacturer, that never manufactured an O.E. part for their vehicles ........just put in a GM Original Equipment box/package, and sold at a very very very inflated price, to another successfully conned customer!

**Q: Will this cap fit 2006 Pontiac grand prix**
A: I think it don't fit because the Pontiac I believe have expansion tank and the cap is different. GMC savana have the cap rigth at the radiator "neck."

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect fit OEM part
*by P***L on January 30, 2026*

OEM part perfect fit the price was half what auto parts store charge will buy from that vendor again

### ⭐⭐⭐⭐⭐ Great cap.
*by J***. on January 6, 2026*

Don’t listen to the nons. This cap works fine. Used it on a 2004 gmc canyon with the 3.5L 5cyl. Works great.

### ⭐⭐⭐⭐⭐ Works well
*by F***R on August 29, 2025*

Perfect replacement cap for the old Buick! Works as intended. Good fit

## Frequently Bought Together

- ACDelco GM Original Equipment RC85 15 P.S.I. Radiator Cap
- ACDelco Professional 252-822 Water Pump Kit
- ACDelco Gold 20382S Molded Upper Radiator Hose

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-13*