Replaces the burnt friction plates in GM 6L80 and 6L90 six-speed automatics with the factory GM Original Equipment set, part number 24248008.
When a Silverado, Tahoe, Yukon, Escalade, Camaro SS or Corvette with the GM six-speed starts flaring between gears, slipping at highway speed or losing reverse, the teardown usually finds the same thing: cooked friction plates and lining material in the pan. This is the GM Original Equipment friction plate package, GM and ACDelco part number 24248008, made in the United States with the same friction material General Motors installs at the factory. Builders who want to document an OE-spec rebuild of a 6L80, 6L90 or 6L50 can put the GM number on the work order.
The 6L80 gets six forward speeds from five clutches: the 1-2-3-4, 3-5-Reverse and 4-5-6 rotating clutches, plus the 2-6 and low and reverse holding clutches. Each pack alternates friction plates with steel plates. When the TCM commands a shift, a piston squeezes the stack and the friction lining grabs the steel, locking one member to another. Every shift releases one clutch while applying another, so the lining is doing real work hundreds of times on every drive. The 3-5-R and 4-5-6 packs see the most cycling and are where wear usually starts. Once a pack slips, the lining overheats, glazes and sheds material, and that debris travels through the valve body and the cooler.
Not every flare is a burnt pack. GM documented a cold 2-3 slip on Camaro six-speeds caused by trapped air in the 3-5-R clutch, fixed by a reverse-to-drive purge rather than new parts, and our 6L80 Camaro shift problems guide walks through that test. Pump wear and low line pressure can also make good clutches slip, which is covered in the 6L80 pump failure guide. Drop the pan first. Heavy lining material on the magnet and in the filter confirms the packs are burnt and the unit needs to come apart.
The listed fitment for 24248008 covers 2009-2022 applications of its six-speed rear-drive family: Silverado and Sierra 1500, 2500 and 3500, Tahoe, Suburban, Yukon and Yukon XL, Escalade and Escalade ESV, Avalanche, Express and Savana vans, Corvette, Camaro SS, Chevrolet SS, Pontiac G8, and 2009 Cadillac STS and XLR. That covers the 6L80, the heavier 6L90 and the 6L50. The 6L90 uses a longer case and upgraded internals, so count the plates in each pack you are rebuilding and compare them with the kit before you start. If you are unsure, send us the year and VIN. Browse matching parts on the 6L80 parts page.
Soak every new friction in clean Dexron VI for at least twenty minutes before assembly. Inspect the steels: any that are blue, dished or heat-checked must be replaced or the new lining will glaze quickly. Stack frictions and steels in the original order, then measure clearance against GM's specification for each clutch before the snap ring goes in. Air-check each piston once the packs are assembled. A burnt-clutch failure fills the cooler with debris, and low-pressure-drop auxiliary coolers cannot be flushed, so replace a cooler that took in material and flush the radiator cooler hot. Replace every seal with an 6L80E/6L90E overhaul seal and gasket kit, and after install use a pressurized fill pump, check the level hot, then reset adaptive learn and complete the fast learn with a scan tool. Our 6L80 common problems guide covers why heat causes most of these failures.
| Fits | GM 6L80, 6L90 and 6L50 six-speed automatics, 2009-2022 GM cars, trucks and vans |
| GM / ACDelco part number | 24248008 |
| Type | GM Original Equipment automatic transmission friction plate kit |
| Package weight | 1.54 lb |
| Package dimensions | 9.7 x 4.3 x 9.3 in |
| Country of origin | Made in United States |
| Ships | From the USA |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes. 24248008 is the GM and ACDelco Original Equipment friction plate package, made in the United States, not an aftermarket substitute.
The listed fitment for 24248008 covers 6L80, 6L90 and 6L50 applications from 2009 to 2022. The 6L90 has different internals, so count the plates in each pack you are rebuilding and compare them with the kit before assembly.
Replace any steel that is blue, warped or heat-checked. New frictions against damaged steels will glaze and slip again quickly.
At least twenty minutes in clean Dexron VI so the lining is fully saturated before the packs go together.
Fill with Dexron VI, check the level hot with the engine running, then reset the transmission adaptive values and run the fast learn procedure with a capable scan tool.
