The 6L80 is GM's modern 6-speed RWD - Silverados, Sierras, Camaros, Corvettes. Friction-sensitive to fluid type. Unforgiving of wrong-spec Dexron VI when it needs Dexron HP. Tighter tolerances than the 4L60E/4L80E generation. Here's what to stock for clean rebuilds.
P0776 / P0796 / P0982 codes all point to solenoid body failure. Replace the full pack - they fail in waves on these units. ~$200-300 part vs $1,500+ in comeback labor.
View on ShopifySymptom: "stuck in 2nd gear" or loss of multiple gears at once. The wave plate fractures and takes the clutch pack with it. Mechanical rebuild required.
View on ShopifyCRITICAL: do not install with Dexron VI fluid. The 6L80 friction is sensitive - wrong fluid causes immediate slip and shudder. Drain + fill with Dexron HP only on this unit.
View on ShopifyBore wear in the pressure regulator causes harsh 1-2 even after rebuild. Sonnax oversize PR kit fixes the bore + installs new valve. Standard upgrade on 6L80 rebuilds 100K+.
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Master Rebuild Kit (Your Transmission) on Amazon →Filter & Gasket Service Kit on Amazon →Shift Solenoid Set on Amazon →Replacement Torque Converter on Amazon →Transmission Assembly Lube (16oz) on Amazon →Specific OE-number deep dives — symptoms, resistance specs, install procedure, and direct-ship pricing.