Transmission. Control. Automatic.

Part Number: 85565586
Supersession(s): 85515702; 86564192

Automatic Transmission Control Module. Automatic Transmission Shifter Linkage. Assembly - (A/T). Module. Shifter Linkage. Auto. Gear Shift Assembly. Included with: Column Assembly.

Automatic Transmission Control Module

Fits Sierra 1500, Sierra 1500 Limited, Sierra 2500 HD, Sierra 3500 HD, Silverado

10 spd trans. 2019-21, 2022 LIMITED, w/10 speed trans. 2022-25 REDESIGN, W/O POWER TILT/TELESCOPING, 10 speed trans. Silverado, Sierra 2500 HD; 10 Speed Trans. Silverado, Sierra 3500 HD; 10 Speed Trans. Silverado, Sierra; 10L80. Silverado, Sierra; 10L80 Trans. W/O POWER TILT/TELESCOPING, 10 spd trans.
Trans Control Module - Repair or Replace
The transmission control module is known by several names—the TCM, PCM, ECM, ECU, PGM-FI—and the problems associated with them can be esoteric. But our GMC technicians are experts in diagnosing and repairing the problems associated with the control module in your 2021 GMC Sierra 3500 HD.

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This product fits 2914 vehicle variants.
Chevrolet: 1 models, 1542 variants between 2019 and 2024.
GMC: 4 models, 1372 variants between 2019 and 2024.

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