{"product_id":"2004-5-2005-duramax-lly-tune-files","title":"2004.5-2005 Duramax LLY Tune Files","description":"\u003ch1\u003e\u003cspan\u003eEFILive Custom Tuning for 2004.5–2005 LLY Duramax\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUnlock the full potential of your \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e2004.5–2005 Chevrolet\/GMC LLY Duramax\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e with custom EFILive tuning\u003c\/span\u003e\u003cspan\u003e. Whether you're looking for improved towing performance, better fuel economy, or maximum off-road performance, each tune is professionally calibrated to match your truck and modifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eEvery tune is built specifically for your vehicle using the information you provide during checkout. No generic files—every calibration is customized for your truck.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch1\u003e\u003cspan\u003eAvailable Tune Levels\u003c\/span\u003e\u003c\/h1\u003e\n\u003ch2\u003e\u003cspan\u003e25 HP Tow\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDesigned for heavy towing and daily work applications. This tune delivers improved low-end torque, smoother throttle response, and better drivability while maintaining safe exhaust gas temperatures under load.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eRecommended for:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHeavy towing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWork trucks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDaily driving\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStock transmissions\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e45 HP Economy\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA balanced calibration focused on improved drivability and fuel efficiency during normal driving. Power gains are moderate while maintaining excellent reliability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eRecommended for:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDaily drivers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHighway mileage\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLight towing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStock trucks\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\n\u003cspan\u003e75 HP Street \u003c\/span\u003e\u003cem\u003e\u003cspan\u003e(Transmission Tune Recommended)\u003c\/span\u003e\u003c\/em\u003e\n\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eOur most popular daily performance tune. Provides a noticeable increase in horsepower and torque with improved throttle response and stronger acceleration while remaining comfortable for everyday driving.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eRecommended for:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDaily performance\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMildly modified trucks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLight competition use\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eTransmission tuning is strongly recommended at this power level.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e90 HP Performance\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBuilt for enthusiasts looking for aggressive street performance and quick throttle response. This tune delivers substantial power gains and is best suited for trucks with supporting modifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eRecommended for:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePerformance street driving\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModified trucks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExperienced drivers\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eTransmission tuning is highly recommended.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e120 HP Race\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eOur highest-output calibration intended for off-road and competition use. This tune maximizes engine performance and should only be used on properly maintained trucks with appropriate supporting modifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eRecommended for:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCompetition\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOff-road use\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePerformance builds\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eTransmission tuning is strongly recommended and supporting modifications may be required.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch1\u003e\u003cspan\u003eOptional Upgrades\u003c\/span\u003e\u003c\/h1\u003e\n\u003ch2\u003e\u003cspan\u003eShift on the Fly (SOTF)\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUpgrade to \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eShift on the Fly (SOTF)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and switch between multiple power levels while driving using a compatible \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eDSP5 switch\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. This allows you to quickly change between calibrations without stopping to reflash the ECM, making it ideal for towing, daily driving, or maximum performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eImportant:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e A compatible \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e2004.5–2005 LLY DSP5 Shift on the Fly Switch\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003erequired\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for this option and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eis not included\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e with the purchase of your tuning. The switch is required to change between tune positions while driving. DSP5 systems use a dedicated switch to select between the available calibrations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eNeed a switch?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Purchase one here:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca href=\"https:\/\/provenpowersolutions.com\/products\/2001-2004-duramax-lb7-dsp5-switch-copy\" title=\"2004.5-2005 Duramax LLY DSP5 Switch\" style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003e2004.5–2005 Duramax LLY DSP5 Shift on the Fly Switch\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003ca href=\"https:\/\/provenpowersolutions.com\/products\/2001-2004-duramax-lb7-dsp5-switch-copy\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eTransmission Tuning\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eOur custom transmission tuning improves:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eShift quality\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTorque converter strategy\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClutch holding capacity\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOverall drivability\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eWhile optional for lower power levels, transmission tuning is highly recommended for higher horsepower calibrations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eVIN License\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAlready have an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eEFILive FlashScan or AutoCal\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e? Add a VIN License to license your vehicle for custom tuning.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIf purchasing a new FlashScan or AutoCal from Proven Power Solutions, a VIN License may already be included. Refer to the product description or contact us if you're unsure.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch1\u003e\u003cspan\u003eWhat You'll Need\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eTo build your custom tune, please provide:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eVehicle VIN\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTune Description and Vehicle Information\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTire Size (if applicable)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTCM Serial Number (when purchasing Transmission Tuning)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFlashScan\/AutoCal Serial Number (when purchasing a VIN License)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAuth Code (when purchasing a VIN License)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch1\u003e\u003cspan\u003eImportant Information\u003c\/span\u003e\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eEvery tune is custom-built specifically for your vehicle.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNo generic or canned tune files are used.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCustom tuning files are built after your order has been reviewed.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePlease verify all vehicle information before submitting your order to prevent processing delays.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePerformance results may vary depending on vehicle condition, supporting modifications, fuel quality, and maintenance.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eCustom Tune Sales Policy\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eAll custom tuning sales are final and non-refundable.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Each tune is custom-built specifically for your vehicle using the VIN, vehicle information, and modifications you provide during checkout. Because these calibrations are personalized and cannot be resold or reused, custom tuning purchases are \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003enot eligible for refunds, returns, or exchanges\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e once tuning has begun or the tune files have been delivered.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePlease review your order carefully and ensure all vehicle information is accurate before completing your purchase. If you have any questions about compatibility or selecting the correct tuning options, please contact Proven Power Solutions prior to ordering—we're happy to help.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eOff-Road Use Notice\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eSome tuning options are intended for off-road or competition use only where permitted by law. It is the customer's responsibility to comply with all applicable federal, state, and local emissions regulations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eNeed Help Choosing the Right Tune?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eIf you have questions about which tune level is right for your truck, contact \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eProven Power Solutions\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and we'll be happy to help you select the best calibration for your goals.\u003c\/span\u003e\u003c\/p\u003e","brand":"Proven Power Solutions","offers":[{"title":"Single File \/ Yes \/ Yes","offer_id":58290491785519,"sku":null,"price":650.0,"currency_code":"USD","in_stock":true},{"title":"Single File \/ Yes \/ No","offer_id":58290491818287,"sku":null,"price":500.0,"currency_code":"USD","in_stock":true},{"title":"Single File \/ No \/ Yes","offer_id":58290491851055,"sku":null,"price":400.0,"currency_code":"USD","in_stock":true},{"title":"Single File \/ No \/ No","offer_id":58290491883823,"sku":null,"price":250.0,"currency_code":"USD","in_stock":true},{"title":"Switch on the Fly \/ Yes \/ Yes","offer_id":58290491916591,"sku":null,"price":675.0,"currency_code":"USD","in_stock":true},{"title":"Switch on the Fly \/ Yes \/ No","offer_id":58290491949359,"sku":null,"price":525.0,"currency_code":"USD","in_stock":true},{"title":"Switch on the Fly \/ No \/ Yes","offer_id":58290491982127,"sku":null,"price":425.0,"currency_code":"USD","in_stock":true},{"title":"Switch on the Fly \/ No \/ No","offer_id":58290492014895,"sku":null,"price":275.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/8655\/8511\/files\/EFILIVENOTXT_8d45170b-ed78-4e11-aa7a-1d493a771b38.webp?v=1786002159","url":"https:\/\/provenpowersolutions.com\/products\/2004-5-2005-duramax-lly-tune-files","provider":"Proven Power Solutions ","version":"1.0","type":"link"}