---
product_id: 15790844
title: "9G (12639701) Glow Plug (Pack of 1)"
brand: "gm genuine parts"
price: "€ 36.43"
currency: EUR
in_stock: true
reviews_count: 13
category: "Gm Genuine Parts"
url: https://www.desertcart.it/products/15790844-9g-12639701-glow-plug-pack-of-1
store_origin: IT
region: Italy
---

# Optimized electrical flow from battery Self-regulating heat control Wide range of reach sizes (21-40mm) 9G (12639701) Glow Plug (Pack of 1)

**Brand:** gm genuine parts
**Price:** € 36.43
**Availability:** ✅ In Stock

## Summary

> 🔥 Ignite your diesel’s power with GM Genuine precision!

## Quick Answers

- **What is this?** 9G (12639701) Glow Plug (Pack of 1) by gm genuine parts
- **How much does it cost?** € 36.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/15790844-9g-12639701-glow-plug-pack-of-1)

## 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

- • **OEM-Backed Quality:** Engineered and tested to GM’s rigorous standards for guaranteed fit and function.
- • **Versatile Fit Range:** Available in 21mm to 40mm reaches to perfectly match diverse combustion chambers.
- • **Long-Lasting Durability:** Trusted by professionals with proven 5+ year lifespan under heavy-duty use.
- • **Smart Thermal Regulation:** Self-regulating coil prevents overheating, protecting your engine and battery.
- • **Precision Cold-Start Ignition:** Delivers instant heat to diesel engines for reliable starts in any chill.

## Overview

GM Genuine Parts 9G Glow Plug (12639701) is a premium, OE-quality diesel engine glow plug designed to ensure fast cold starts and optimal ignition. Featuring a self-regulating coil to prevent overheating and available in multiple reach sizes, it fits a wide range of diesel engines. Backed by GM and ACDelco engineering, it offers durable, reliable performance trusted by professionals and enthusiasts alike.

## Description

GM Genuine Parts Glow Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. ACDelco Professional Glow Plugs are specially designed to give diesel engines the heat they need for cold starts, and are a high quality replacement for many vehicles on the road today. They maintain ignition in all cylinders, optimizing throttle response. These premium aftermarket replacement glow plugs are manufactured to meet or exceed your expectations for fit, form, and function. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Review: Good value, quailty product... - 5 years in on 4 each replacements, no failures. Box marked as made in Germany (Bosch)
Review: All good! - I've replaced two of eight so far (235k miles) with glow plugs from this seller. Ships in OEM box, identical to the ones removed. Both are working fine. Just ordered two more to have on-hand. 2015 2500HD Silverado LML Duramax. Generally easy fix if you remove the inner fender well. Most are very easy access but #8 was tight quarters. Not bad with a 3/8" swivel and/or flex driver. You'll need a 10mm deep socket for the injector, 8mm socket for the nut, and a scan tool of some sort to turn the CEL off after replacement. Don't drop that little nut. ~Hour job.

## Features

- Designed to give diesel engines the heat they need for cold starts
- GN-type regulating coil
- Self-regulating to control electrical flow from the battery as temperatures rise to avoid overheating
- Full range of reaches - from 21 mm to 40 mm - to meet chamber requirements in a wide variety of applications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00496LXJ8 |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #12,927 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Ignition Glow Plugs |
| Brand | GM GENUINE PARTS |
| Core Material | Copper |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,728) |
| Date First Available | October 26, 2010 |
| Exterior | Machined |
| Global Trade Identification Number | 00707773990704 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.44 ounces |
| Item model number | 12639701 |
| Manufacturer | ACDelco |
| Manufacturer Part Number | 12639701 |
| Model | 12639701 |
| OEM Part Number | 12639701 |
| Product Dimensions | 6.2 x 1 x 1 inches |
| Thread Size | 10 millimeters |
| Top Material Type | Metal |
| UPC | 707773990704 |
| Vehicle Service Type | Truck |

## Product Details

- **Brand:** GM GENUINE PARTS
- **Core Material:** Copper
- **Thread Size:** 10 millimeters
- **Top Material Type:** Metal
- **Vehicle Service Type:** Truck

## Images

![9G (12639701) Glow Plug (Pack of 1) - Image 1](https://m.media-amazon.com/images/I/51xkwWqxTUL.jpg)

## Questions & Answers

**Q: is this the right glow plug for replacement of a 97364968 unit?**
A: These are glowplugs for a 6.6L Duramax.

**Q: What's the difference between the 61g and the 9g glow plugs? Which is better?**
A: 9G IS THE NEW NUMBER

**Q: can these plugs work in a 2005 nissan urvan jn1lg4e25z0702191?**
A: These plugs do not admit a spark like a spark plug. They are for Diesel engines only.

**Q: Will these fit 2012 lml duramax**
A: yes. I used it in a 2008 Duramax engine and it works perfectly

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good value, quailty product...
*by K***. on February 13, 2026*

5 years in on 4 each replacements, no failures. Box marked as made in Germany (Bosch)

### ⭐⭐⭐⭐⭐ All good!
*by X***F on December 30, 2024*

I've replaced two of eight so far (235k miles) with glow plugs from this seller. Ships in OEM box, identical to the ones removed. Both are working fine. Just ordered two more to have on-hand. 2015 2500HD Silverado LML Duramax. Generally easy fix if you remove the inner fender well. Most are very easy access but #8 was tight quarters. Not bad with a 3/8" swivel and/or flex driver. You'll need a 10mm deep socket for the injector, 8mm socket for the nut, and a scan tool of some sort to turn the CEL off after replacement. Don't drop that little nut. ~Hour job.

### ⭐⭐⭐⭐⭐ Replacement glow plugs.
*by J***E on January 26, 2026*

Slightly different ratings then what I pulled out. But they work.

## Frequently Bought Together

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-03-22*