--- product_id: 14461630 title: "GM Genuine Parts 20850923 Trailer Brake Control Module Assembly" brand: "gm genuine parts" price: "€ 166.62" currency: EUR in_stock: true reviews_count: 13 category: "Gm Genuine Parts" url: https://www.desertcart.com.cy/products/14461630-gm-genuine-parts-20850923-trailer-brake-control-module-assembly store_origin: CY region: Cyprus --- # Optimized trailer brake control OE-spec precision fit Durable GM-tested build GM Genuine Parts 20850923 Trailer Brake Control Module Assembly **Brand:** gm genuine parts **Price:** € 166.62 **Availability:** ✅ In Stock ## Summary > 🚛 Take control with GM precision – your trailer’s new best friend! ## Quick Answers - **What is this?** GM Genuine Parts 20850923 Trailer Brake Control Module Assembly by gm genuine parts - **How much does it cost?** € 166.62 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/14461630-gm-genuine-parts-20850923-trailer-brake-control-module-assembly) ## 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 - • **Built to Last:** Crafted with durable materials to withstand heavy-duty use - • **Backed by GM Assurance:** Tested and validated by General Motors for peace of mind - • **Optimized Trailer Safety:** Ensures smooth, responsive trailer braking every time - • **Factory-Grade Reliability:** Engineered to GM OE specs for flawless fit and function - • **Plug-and-Play Installation:** Direct replacement designed for hassle-free setup ## Overview The GM Genuine Parts 20850923 Trailer Brake Control Module Assembly is a factory-recommended replacement part engineered to meet original equipment specifications. Designed and tested by General Motors, it guarantees reliable, durable performance and seamless integration with your GM vehicle’s trailer brake system, ensuring optimal safety and control on the road. ## Description GM Genuine Parts Trailer Brake Control Modules are designed, engineered, and tested to rigorous standards, and are backed by General Motors. 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: Works well, worth the money if you need to use the trailer brake - I bought a 2009 Silverado 2500 at auction and come to find out the entire trailer brake control module and relay were missing. Ordered this and it was at my doorstep as expected. Install was painless, no complaints. After installed got fault code C1114, then realized I had to get it programmed by a local automotive ECM/programming shop for $100 so budget at least this as the local Chevrolet dealer wanted $160 Review: Works great! - Works great. This item does need to be programmed for your vehicle. Be aware of that before buying. Some people seem to leave negative feedback on items they do not understand. Many GM modules have to be programmed for the car they go into to work correctly. ## Features - GM-recommended replacement part for your GM vehicle’s original factory component - Offering the quality, reliability, and durability of GM OE - Manufactured to GM OE specification for fit, form, and function ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0049HGOYG | | Best Sellers Rank | #123,985 in Automotive ( See Top 100 in Automotive ) #10 in Automotive Replacement Power Brake Systems | | Brand | GM GENUINE PARTS | | Customer Reviews | 4.0 4.0 out of 5 stars (128) | | Date First Available | October 27, 2010 | | Exterior | Machined | | Is Discontinued By Manufacturer | No | | Item Weight | 13.4 ounces | | Item model number | 20850923 | | Manufacturer | ACDelco | | Manufacturer Part Number | 20850923 | | Model | Trailer Brake Control Module | | OEM Part Number | 20850923 | | Product Dimensions | 8.4 x 6.3 x 2 inches | ## Images ![GM Genuine Parts 20850923 Trailer Brake Control Module Assembly - Image 1](https://m.media-amazon.com/images/I/41xxOljqW2L.jpg) ![GM Genuine Parts 20850923 Trailer Brake Control Module Assembly - Image 2](https://m.media-amazon.com/images/I/51kUAE9BoLL.jpg) ![GM Genuine Parts 20850923 Trailer Brake Control Module Assembly - Image 3](https://m.media-amazon.com/images/I/41ndYgwrg-L.jpg) ## Questions & Answers **Q: Why do brakes need to be replaced in the first place?** A: Friction material on the brake pad contacts the rotors to slow the vehicle. In time, that material wears away and the pads must be replaced. Sometimes the rotors and calipers must also be replaced. **Q: What’s the squealing sound I hear when braking?** A: Over time, wear indicators in brake pads may contact the rotors’ surface when braking, resulting in a metallic squealing sound. Vehicles equipped with wear sensors may also provide an alert that minimum brake pad thickness has been reached. **Q: What if it’s more of a grinding sound?** A: If all the friction material has been worn away, the metal backing plate of the brake pad will be the material in contact with the rotor during braking. It causes a grinding sound and braking performance is often diminished. **Q: Why do the brakes seem to pulsate when stopping?** A: It may be due to worn brake pads, unevenly worn rotors or unevenly worn tires. Have the pulsation diagnosed as soon as possible to avoid the possibility of greater brake system wear or damage. **Q: What about vibrations or shaking in the steering wheel?** A: This is more serious than pulsation. If the brakes are very worn or the rotors are unevenly worn, there can be a significant vibration or shaking in the steering wheel when braking. It may mean brake service is needed immediately. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works well, worth the money if you need to use the trailer brake *by T***G on July 7, 2019* I bought a 2009 Silverado 2500 at auction and come to find out the entire trailer brake control module and relay were missing. Ordered this and it was at my doorstep as expected. Install was painless, no complaints. After installed got fault code C1114, then realized I had to get it programmed by a local automotive ECM/programming shop for $100 so budget at least this as the local Chevrolet dealer wanted $160 ### ⭐⭐⭐⭐⭐ Works great! *by J***N on October 22, 2016* Works great. This item does need to be programmed for your vehicle. Be aware of that before buying. Some people seem to leave negative feedback on items they do not understand. Many GM modules have to be programmed for the car they go into to work correctly. ### ⭐ Needs to be programmed *by C***. on February 18, 2025* I was unaware that this part needs to be programmed to buy a local Chevy dealer before it can be used. Make sure you have your old one first. Returning mine as I don't want the extra added expense --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.cy/products/14461630-gm-genuine-parts-20850923-trailer-brake-control-module-assembly](https://www.desertcart.com.cy/products/14461630-gm-genuine-parts-20850923-trailer-brake-control-module-assembly) --- *Product available on Desertcart Cyprus* *Store origin: CY* *Last updated: 2026-04-25*