---
product_id: 387068969
title: "GM Genuine Parts 12639250 LS Rear Block Cover"
brand: "gm genuine parts"
price: "A$454"
currency: AUD
in_stock: true
reviews_count: 5
category: "Gm Genuine Parts"
url: https://www.desertcart.com.au/products/387068969-gm-genuine-parts-12639250-ls-rear-block-cover
store_origin: AU
region: Australia
---

# OE precision engineering Rigorous GM testing Made in USA quality GM Genuine Parts 12639250 LS Rear Block Cover

**Brand:** gm genuine parts
**Price:** A$454
**Availability:** ✅ In Stock

## Summary

> ⚙️ Upgrade your ride with GM Genuine precision – because your engine deserves the best!

## Quick Answers

- **What is this?** GM Genuine Parts 12639250 LS Rear Block Cover by gm genuine parts
- **How much does it cost?** A$454 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/387068969-gm-genuine-parts-12639250-ls-rear-block-cover)

## Best For

- gm genuine parts enthusiasts

## Why This Product

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

## Key Features

- • **Proudly Made in the USA:** Manufactured domestically, supporting quality craftsmanship and trusted supply chains.
- • **Engineered for Excellence:** GM Genuine Parts are designed and validated by GM engineers to fit your Chevrolet, Buick, GMC, or Cadillac perfectly.
- • **Rigorous Quality Assurance:** Tested to meet strict GM standards ensuring reliability and long-lasting performance.
- • **Seamless OEM Compatibility:** Formerly ACDelco OE parts, now updated with the latest materials and technology for superior function.
- • **Precision Machined Exterior:** Crafted with a machined finish for durability and seamless integration into your vehicle’s engine system.

## Overview

The GM Genuine Parts 12639250 LS Rear Block Cover is a medium-sized, machined exterior engine component designed and rigorously tested by GM engineers. It ensures perfect OEM fitment for Chevrolet, Buick, GMC, and Cadillac vehicles, incorporating the latest materials and technology. Proudly made in the USA, this part guarantees durability and reliability for your engine’s optimal performance.

## Description

GM Housing - 12639250

Review: Only way to go ...buy Genuine
Review: This kit fixed my rear main seal leak on my Silverado. My stepdad ordered the same set and we fixed his Cadillac Escalade as well. The upgraded bolts are nice. Some reviews say it is not genuine OEM. I really don't know if it is or isn't. I'm not sure how you can tell but it definitely fits correctly and does the job. It is also easier to do with this kit than swapping the seal without a new housing.

## Features

- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | GM Genuine Parts |
| Brand | GM GENUINE PARTS |
| Model | GM Original Equipment |
| Product Dimensions | 32.26 x 30.99 x 8.13 cm; 1.05 kg |
| Item model number | 12639250 |
| Exterior | Machined |
| Manufacturer Part Number | 12639250 |
| OEM Part Number | 12639250 |
| Size | medium |
| Colour | Natural |
| Assembly Required | No |
| Manufacturer | GM Genuine Parts |
| Country of Origin | USA |
| Item Weight | 1 kg 50 g |

## Images

![GM Genuine Parts 12639250 LS Rear Block Cover - Image 1](https://m.media-amazon.com/images/I/71K-Mq8OqIL.jpg)

## Questions & Answers

**Q: Will this fit a 2014 Camaro ZL1?**
A: This should fit any Gen 4 LS block, including the LSA, which is what the ZL1 has.

**Q: Will this fit a 2011 chevy silverado 1500 crew cab with 5.3 L engine**
A: Yes

**Q: Will this fit my 2005 Silverado 4.8 engine**
A: Yes Sir, it will fit!

**Q: When will you have these back in stock to ship out? I ordered one a week ago then the order was cancelled because of the condition of the unit you had**
A: We have these in stock at this time. April 11, 2022

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by C***Y on 13 May 2025*

Only way to go ...buy Genuine

### ⭐⭐⭐⭐⭐ Review
*by G***Y on 21 June 2024*

This kit fixed my rear main seal leak on my Silverado. My stepdad ordered the same set and we fixed his Cadillac Escalade as well. The upgraded bolts are nice. Some reviews say it is not genuine OEM. I really don't know if it is or isn't. I'm not sure how you can tell but it definitely fits correctly and does the job. It is also easier to do with this kit than swapping the seal without a new housing.

### ⭐⭐⭐⭐⭐ Review
*by L***. on 28 February 2021*

Excelente si arreglamos el problema de mi motor gracias 🙋🏻‍♂️

## Frequently Bought Together

- GM Genuine Parts 12639250 LS Rear Block Cover
- OywhC LS Billet Rear Galley Plug Barbell Oil Diverter fits for GM Gen III & IV LS1 LS3 LS2 LQ4 LQ9 LS6 L92 L33 L99 Oil Diverter LS Barbell 6061-T6 Aluminum Alloy Material
- Camshaft Retainer Plate Gasket Compatible with LS Series Engines, &Bolt Kit ARP 134-1003 Gen III IV V for GM LS1 LS2 LS3 4.8 5.3L 6.0L 6.2L Vortec Corvette Cam

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**Shop now:** [https://www.desertcart.com.au/products/387068969-gm-genuine-parts-12639250-ls-rear-block-cover](https://www.desertcart.com.au/products/387068969-gm-genuine-parts-12639250-ls-rear-block-cover)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-19*