---
product_id: 425810103
title: "GM Genuine Parts 12135037 Multi-Function Diode"
brand: "gm genuine parts"
price: "฿951"
currency: THB
in_stock: true
reviews_count: 5
category: "Gm Genuine Parts"
url: https://www.desertcart.co.th/products/425810103-gm-genuine-parts-12135037-multi-function-diode
store_origin: TH
region: Thailand
---

# Precision-engineered for optimal electrical flow Vehicle-specific fit for seamless installation Tested & warranted to GM OE standards GM Genuine Parts 12135037 Multi-Function Diode

**Brand:** gm genuine parts
**Price:** ฿951
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your ride’s heartbeat with GM Genuine precision!

## Quick Answers

- **What is this?** GM Genuine Parts 12135037 Multi-Function Diode by gm genuine parts
- **How much does it cost?** ฿951 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/425810103-gm-genuine-parts-12135037-multi-function-diode)

## 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

- • **Compact Powerhouse:** Lightweight and machined to fit discreetly without compromising performance or space.
- • **GM-Backed Reliability:** Tested and warranted by GM, guaranteeing OEM quality and long-lasting durability.
- • **Precision Fit, Zero Guesswork:** Designed specifically for GM vehicles to ensure hassle-free installation and perfect compatibility.
- • **Trusted by Pros & DIYers Alike:** Preferred choice for mechanics and enthusiasts who demand genuine quality and proven results.
- • **Boost Your Battery’s Performance:** Enhances charging efficiency, especially for AGM batteries in older models—upgrade your electrical system’s game.

## Overview

The GM Genuine Parts 12135037 Multi-Function Diode is a compact, vehicle-specific inline diode engineered to meet GM Original Equipment standards. It ensures optimal electrical flow and improved charging system performance, especially for AGM batteries in older vehicles. Tested, warranted, and designed for seamless installation, this diode is a trusted upgrade for Chevrolet, Buick, GMC, and Cadillac owners seeking reliable, OEM-quality electrical components.

## Description

Maintain your Chevrolet, Buick, GMC, or Cadillac vehicle with a Genuine GM Parts Multi Purpose Inline Diode. Only Genuine GM Parts are tested to meet GM Original Equipment standards and are designed specifically to fit your vehicle. WARNING: Cancer and Reproductive Harm

Review: Works as intended. Bought this for the alternator I installed in the tractor.
Review: I have several older model vehicles. Both With AGM type batteries, however the original electrical system and alternator were designed for the original flooded lead cell acid battery design. This diode is a game changer in improving the performance of the charging system on these older vehicles. So that the AGM battery can fully charge. This diode fits with some very minor modifications . You have to trim away some of the plastic casing around the diode so that it will fit in to the fuse slot correctly . Performs well in my vehicles, 89 & 97 Toyota land Cruisers.

## Features

- Designed, engineered, tested, and warranted for GM vehicles.Fit Type: Vehicle Specific
- Precise fit for ease of installation
- For proper installation, locate your nearest GM dealer, independent service center, or body shop

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08WHLPQR3 |
| Best Sellers Rank | #73,429 in Automotive ( See Top 100 in Automotive ) #2 in Automotive Alternator & Generator Diodes |
| Brand | GM GENUINE PARTS |
| Customer Reviews | 4.7 4.7 out of 5 stars (302) |
| Date First Available | 28 November 2021 |
| Exterior | Machined |
| Item Weight | 10 g |
| Item model number | 12135037 |
| Manufacturer | GM Genuine Parts |
| Manufacturer Part Number | 12135037 |
| Model | GM Original Equipment |
| Product Dimensions | 3.3 x 2.79 x 0.76 cm; 10 g |

## Images

![GM Genuine Parts 12135037 Multi-Function Diode - Image 1](https://m.media-amazon.com/images/I/41SeXKpp+iL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by B***N on 16 November 2025*

Works as intended. Bought this for the alternator I installed in the tractor.

### ⭐⭐⭐⭐⭐ Review
*by M***. on 30 June 2024*

I have several older model vehicles. Both With AGM type batteries, however the original electrical system and alternator were designed for the original flooded lead cell acid battery design. This diode is a game changer in improving the performance of the charging system on these older vehicles. So that the AGM battery can fully charge. This diode fits with some very minor modifications . You have to trim away some of the plastic casing around the diode so that it will fit in to the fuse slot correctly . Performs well in my vehicles, 89 & 97 Toyota land Cruisers.

### ⭐⭐⭐⭐⭐ Review
*by G***N on 28 August 2025*

Works well for the gen4 4Runner “smart”alternator to charge my AGM.

## Frequently Bought Together

- GM Genuine Parts 12135037 Multi-Function Diode
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- MUYI 6 Pack Inline Fuse Holder - 14AWG Gauge Wire Pigtail Mini Blade Fuse Holder with 15A Mini Blade Fuses ATM

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-17*