--- product_id: 81845180 title: "PPE Performance Transmission Cooler for 2003 2004 2005 CHEVY GMC LB7/LLY & LBZ/LMM 124060300" price: "₱32760" currency: PHP in_stock: true reviews_count: 10 url: https://www.desertcart.ph/products/81845180-ppe-performance-transmission-cooler-for-2003-2004-2005-chevy-gmc store_origin: PH region: Philippines --- # 60% more heat rejection Direct bolt-on fit for 2003-2005 GM HD Lowers fluid temps by 20-30°F PPE Performance Transmission Cooler for 2003 2004 2005 CHEVY GMC LB7/LLY & LBZ/LMM 124060300 **Price:** ₱32760 **Availability:** ✅ In Stock ## Summary > 🌡️ Keep your transmission cool, your ride hotter — don’t let heat kill your torque! ## Quick Answers - **What is this?** PPE Performance Transmission Cooler for 2003 2004 2005 CHEVY GMC LB7/LLY & LBZ/LMM 124060300 - **How much does it cost?** ₱32760 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/81845180-ppe-performance-transmission-cooler-for-2003-2004-2005-chevy-gmc) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Factory Fit:** Direct bolt-on replacement designed specifically for 2003-2005 Allison-equipped GM HD trucks—no mods needed. - • **Unmatched Cooling Power:** 60% increased surface area slashes transmission heat for peak performance. - • **Maximize Transmission Life:** Lowers transmission fluid temps by up to 30°F, protecting your investment under heavy load or high pressure. - • **Plug-and-Play Installation:** Comes with purple clip connectors and hose retainers for a hassle-free upgrade. - • **Built for the Hardest Drivers:** Ideal for towing, racing, or diesel enthusiasts pushing their trucks to the limit. ## Overview The PPE Performance Transmission Cooler is a direct bolt-on upgrade for 2003-2005 Allison-equipped Chevy and GMC HD trucks, engineered to increase heat rejection by 60% and reduce transmission fluid temperatures by 20-30°F. Designed for heavy-duty use including towing and racing, it extends transmission life by efficiently managing excess heat generated under high pressure and load. ## Description Excess heat is the #1 killer of transmissions. For individuals who tow, race or simply run their diesel hard, know that proper cooling of your transmission fluid is one of the most important things that you can do to increase the life of your transmission. When the mainline pressure is increased with things such as a high-performance transmission kit, you end up with additional heat being generated, so we recommend a Performance Transmission Cooler in such applications. PPE’s Performance Transmission Cooler is a direct bolt-on replacement part that lowers the fluid temperatures up to an additional 20 to 30 degrees over the stock unit. Review: Best money spent on my LB7 Duramax - This cooler fits perfect no modifications needed, came with hose retainer clips amd fittings so just connect and bolt on. Lowered my trans temps 30 degrees consistently. I would recommend this to anyone with a 2003 LB7 Duramax with Allison 1000. Will work with stock transmission lines or aftermarket, my lines were good so didn't change them. 5/8" lines the newer models are 7/8 i believe and not explained that clearly so here it is. Put a wrench around ypur line in front and its either one or the other Cardinal Classics NE-AR Review: Great upgrade from stock cooler - The stock one looked like it belonged on a prius, this is a great upgrade for a lifted duramax truck running oversized tires, after install you need to add about half a quart of atf to refill the new cooler, the temperature was 92 degrees and i never got over 170 and i would usually be around 200 with 35s and a 6 inch lift. engine runs about 5 degrees hotter which isnt a bad thing for a diesel, helps with a more complete combustion. Took about an hour to install well worth the money if you have a LLY Duramax ## Features - Increased surface area provides 60% more heat rejection - Factory-fit - 2003-2005 Allison-equipped GM HD vehicles (124060300) - connectors with Purple Clips - Excess heat is the #1 killer of transmissions. For individuals who tow, race or simply run their diesel hard, know that proper cooling of your transmission fluid is one of the most important things that you can do to increase the life of your transmission. - PPE’s Performance Transmission Cooler is a direct bolt-on replacement part that lowers the fluid temperatures up to an additional 20 to 30 degrees over the stock unit. - When the mainline pressure is increased with things such as a high-performance transmission kit, you end up with additional heat being generated, so we recommend a Performance Transmission Cooler in such applications. ## Images ![PPE Performance Transmission Cooler for 2003 2004 2005 CHEVY GMC LB7/LLY & LBZ/LMM 124060300 - Image 1](https://m.media-amazon.com/images/I/61kTTt7SaSL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Best money spent on my LB7 Duramax *by C***R on June 29, 2025* This cooler fits perfect no modifications needed, came with hose retainer clips amd fittings so just connect and bolt on. Lowered my trans temps 30 degrees consistently. I would recommend this to anyone with a 2003 LB7 Duramax with Allison 1000. Will work with stock transmission lines or aftermarket, my lines were good so didn't change them. 5/8" lines the newer models are 7/8 i believe and not explained that clearly so here it is. Put a wrench around ypur line in front and its either one or the other Cardinal Classics NE-AR ### ⭐⭐⭐⭐⭐ Great upgrade from stock cooler *by J***S on July 11, 2020* The stock one looked like it belonged on a prius, this is a great upgrade for a lifted duramax truck running oversized tires, after install you need to add about half a quart of atf to refill the new cooler, the temperature was 92 degrees and i never got over 170 and i would usually be around 200 with 35s and a 6 inch lift. engine runs about 5 degrees hotter which isnt a bad thing for a diesel, helps with a more complete combustion. Took about an hour to install well worth the money if you have a LLY Duramax ### ⭐⭐⭐⭐⭐ Highly recommend this to anyone with a 2005 2500hd Allison Trany. *by J***1 on January 1, 2026* Installed this in my 2005 GMC 2500hd duramax and last spring. I really wish I had done it in 2005 when I bought the truck. Transmission runs way cooler and I highly recommend this to anyone with this truck. --- ## 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.ph/products/81845180-ppe-performance-transmission-cooler-for-2003-2004-2005-chevy-gmc](https://www.desertcart.ph/products/81845180-ppe-performance-transmission-cooler-for-2003-2004-2005-chevy-gmc) --- *Product available on Desertcart Philippines* *Store origin: PH* *Last updated: 2026-07-29*