Product Description
Genuine GM Connecting Rod Bearings 12735504 | Gen V LT 6.2L 6.6L OEM Rod Bearing Set
Fits 2017+ GM Gen V LT 6.2L 6.6L LT1 L86 L87 L8T LT4 | Standard Size Bearings for Stock Crankshafts
Restore proper engine clearances and reliability with these Genuine GM Connecting Rod Bearings (Part #12735504), designed for 2017+ Gen V LT-based 6.2L and 6.6L gasoline engines. These standard size OEM bearings are engineered to deliver precise fitment and consistent performance when paired with a factory crankshaft, making them ideal for engine refreshes, rebuilds, or maintenance on stock applications. Superseding GM part #12683811, these bearings may arrive under either part number but are functionally identical. Available as a single rod set or in full sets to service all 8 rods, these bearings provide the flexibility needed for partial repairs or complete engine builds. Please note: not compatible with 5.3L engines, aftermarket crankshafts, or start/stop engine applications.
Key Features & Benefits
- Genuine GM OEM Bearings: Manufactured to GM’s exact specifications to ensure precise clearances, proper oil control, and long-term durability in Gen V LT engine applications.
- Standard Size for Stock Crankshafts: Designed for use with factory crankshafts, providing an ideal solution for engine refreshes, rebuilds, or maintenance without requiring machining or oversize components.
- Flexible Purchase Options: Choose a single rod bearing set for targeted repairs or multiple sets to service all 8 rods during a complete engine rebuild.
- Superseded Part Compatibility: Replaces GM part #12683811, ensuring compatibility with updated GM engineering while maintaining the same fit and function.
- Designed for Gasoline LT Engines Only: Specifically intended for 6.2L and 6.6L gasoline applications and not compatible with 5.3L engines, aftermarket crankshafts, or start/stop systems.
Key Fitments
- CADILLAC CTS-V 2017-2019
- CADILLAC ESCALADE 2017-2024
- CHEVROLET CAMARO 2017-2024
- CHEVROLET CORVETTE 2014-2025
- CHEVROLET EXPRESS 2500 2021-2024
- CHEVROLET EXPRESS 3500 2021-2024
- CHEVROLET EXPRESS 4500 2021-2024
- CHEVROLET LCF 2020-2024
- CHEVROLET SILVERADO 1500 2017-2024
- CHEVROLET SILVERADO 2500 2020-2024
- CHEVROLET SILVERADO 3500 2020-2024
- CHEVROLET SUBURBAN 2019-2024
- CHEVROLET TAHOE 2018-2024
- GMC SAVANA 2500 2021-2024
- GMC SAVANA 3500 2021-2024
- GMC SAVANA 4500 2021-2024
- GMC SIERRA 1500 2017-2025
- GMC SIERRA 2500 2020-2025
- GMC SIERRA 3500 2020-2025
- GMC YUKON 2017-2024
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Product Reviews
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Genuine GM Replacement Connecting Rod Bearings
recently completed a full rebuild on the 6.2L L86 in my 2018 GMC Yukon XL Denali 4WD, and I used Michigan Motorsports for a large portion of the engine rebuild parts. The main goal of the rebuild was to address the factory DOD/AFM system and convert the engine to a mechanical DOD delete/non-AFM setup. I wanted to do it right while I had the engine completely apart rather than simply replacing the failed components and putting the factory system back in. Some of the Michigan Motorsports parts I used included: * King MB5293SI main bearings * Genuine GM 12735504 connecting rod bearings * Genuine GM 11548432 connecting rod bolts * Michigan Motorsports Gen V LT main cap bolt kit * 7.850” Gen V pushrods * Gen V camshaft bearings * Michigan Motorsports DOD/AFM delete components * Delphi LS7 non-DOD lifters * Non-AFM/DOD camshaft Michigan Motorsports specifically lists its L86 DOD delete kit for the 2014–2018 L86 and includes the components needed to convert the engine to conventional non-DOD lifters, with a non-DOD camshaft and ECM calibration required as part of the conversion. I was impressed with the overall quality and fitment of the parts. Everything went together well during the rebuild, and I didn’t run into any fitment issues with the Michigan Motorsports components. The GM rod bearings were also the correct later-style 12735504 bearings for my 2017+ L86 application. I took my time putting this engine together because I wanted to make sure everything was right — bearing clearances, fasteners, valvetrain, oiling system, and the DOD conversion. After getting everything assembled, priming the engine, and getting it fired up, the Yukon is running great. The engine has a smooth idle, the valvetrain is quiet, oil pressure looks good, and so far everything is operating exactly how I wanted it to. For me, doing the mechanical DOD delete made a lot of sense while rebuilding the engine. Instead of putting the factory AFM/DOD lifters and associated components back into an engine that was already completely apart, I was able to eliminate that system and convert the valvetrain to a conventional setup. Overall, I’m very happy with the Michigan Motorsports parts and the way this rebuild turned out. The parts fit, the engine went together properly, and most importantly, the Yukon is back on the road and running strong. I’d definitely use Michigan Motorsports again on another LS/LT rebuild and would recommend them to anyone doing an L86 rebuild or DOD delete.
