Transmission Fill Adapter DT-51190 Fit for GM 8L45 8L90 8-Speed | Fits Camaro SS 16+ 6.2L / Corvette 15+ 6.2L / Silverado 15-19 5.3L-6.2L / Tahoe 15-20 5.3L-6.2L / Escalade 15-20 6.2L /

Technical Specifications Part Number: DT-51190 OEM Equivalents: DT-51190-A, J-45096 Adapter Product Type: Transmission Fluid Fill Adapter Fitment: 8L45 / 8L90 8-Speed Automatic Transmissions Thread Size: M6 x 1.0 male – confirm before ordering Material: Heavy-duty steel with corrosion-resistant finish Includes: Integrated O-ring seal for leak-free connection Connection: Adapter to J-45096 TransFlow or standard ATF filler hose Complete Verified Fitment Matrix Compatible with Cadillac ATS-V 2016-2019 3.6L V6 8L90 – RWD Compatible with Cadillac CTS-V 2016+ 6.2L V8 8L90 – RWD Compatible with Cadillac Escalade 2015-2020 6.2L V8 8L90 – RWD/4WD Compatible with Chevrolet Camaro SS 2016+ 6.2L V8 8L90 – RWD Compatible with Chevrolet Camaro ZL1 2016+ 6.2L V8 8L90 – RWD Compatible with Chevrolet Corvette 2015+ 6.2L V8 8L90 – RWD Compatible with Chevrolet Silverado 1500 2015-2019 5.3L/6.2L V8 8L90 – RWD/4WD Compatible with Chevrolet Suburban 2015-2020 5.3L/6.2L V8 8L90 – RWD/4WD Compatible with Chevrolet Tahoe 2015-2020 5.3L/6.2L V8 8L90 – RWD/4WD Compatible with GMC Sierra 1500 2015-2019 5.3L/6.2L V8 8L90 – RWD/4WD Compatible with GMC Yukon / Yukon XL 2015-2020 5.3L/6.2L V8 8L90 – RWD/4WD Scenario-Based Application Guide Scenario 1: Transmission fluid service on Silverado 8-speed – When servicing the 8L90 transmission on a 2015-2019 Silverado, the traditional fill tube is missing. This DT-51190 adapter screws into the bottom pan level check hole – the only access point for adding fluid and setting the correct level. Connect to J-45096 TransFlow machine for fluid injection. Scenario 2: "Will this fit my 2020 Camaro SS 10-speed?" – No. This adapter is for 8L45/8L90 8-speed only. 10-speed transmissions use a different fill port configuration. Verify your transmission code before ordering. Scenario 3: "Will this fit my 2014 Silverado 6-speed?" – No. 2014 and earlier GM trucks use 6L80/6L90 transmissions with a traditional dipstick and fill tube – no adapter needed. This fits 2015+ 8-speed models only. Objective Facts for Professionals This transmission fill adapter is manufactured to OE specifications for 8L45/8L90 transmissions. Key installation notes: (1) Thread is M6 x 1.0 male – verify before purchase. (2) The adapter features a built-in riser pipe that sets the correct fluid height – do not modify or remove. (3) Fluid level must be checked with the engine running at operating temperature – checking cold will result in underfill. (4) Before removing the adapter after filling, cycle the shifter through each gear position with the brake depressed, pausing 3 seconds at each position, to ensure proper fluid circulation. (5) This adapter prevents dirt and debris from entering the transmission during service – keep the port clean during installation.

• GM 8-Speed Transmission Fill Adapter – DT-51190 is the essential tool for servicing 8L45 and 8L90 8-speed transmissions. These transmissions have no dipstick or upper fill tube. This adapter threads into the bottom pan check hole and connects to the J-45096 TransFlow fill machine. One tool handles both 8L45 and 8L90 applications.
• 8L45 8L90 Only – Critical Fitment Verification – This adapter fits GM 8L45 and 8L90 8-speed longitudinal transmissions only. Does not fit 10L80/10L90 10-speed transmissions. Does not fit 6L80/6L90 6-speed transmissions. Verify your transmission code before ordering – this is the #1 cause of returns on this application.
• Precision Fluid Level Setting – The adapter features a built-in riser pipe that establishes the correct fluid height inside the pan. After filling with the engine running at operating temperature, excess ATF drains through the adapter until flow changes from stream to drip. This indicates the fluid is exactly at the factory-specified level – no guessing, no overfill.
• Complete Vehicle Coverage – Fits 2015-2020 Escalade 6.2L, 2015-2019 Silverado/Sierra 5.3L-6.2L, 2015-2020 Suburban/Tahoe 5.3L-6.2L, 2015-2019 Yukon 5.3L-6.2L, 2016+ Camaro SS/ZL1 6.2L, 2015+ Corvette 6.2L, 2016+ CTS-V 6.2L, and 2016-2019 ATS-V 3.6L. All with 8L45 or 8L90 transmissions.
• Direct OE Replacement – Replaces DT-51190. Heavy-duty steel construction with corrosion-resistant finish ensures durability and proper sealing during repeated use. Includes integrated O-ring seal for leak-free connection to the pan port. Designed to connect to J-45096 TransFlow or standard ATF filler hoses.