File · GM-8L90-SHUDDER

8L90 / 8L45 8-speed transmission shudder

Manufacturer

GM (Chevrolet/GMC/Cadillac)

Years

2015–2019

Where people complain about this

Reddit reply — long

That sounds like the **8L90 / 8L45 8-speed transmission shudder** issue — it's a known defect on GM (Chevrolet/GMC/Cadillac) Silverado/Sierra/Tahoe from 2015–2019.

GM's 8L90 and 8L45 8-speed automatics produce harsh shifts and shudder due to torque-converter and fluid issues. Class action certified in 2022.

Source: Speerly v. General Motors (E.D. Mich. 2022).

If you've taken it to the dealer 2+ times for the same thing, you might have a lemon-law case. I built a free tool that checks your specific car against active class actions and NHTSA records — defectfiles.com. Takes about 60 seconds, no signup. Worst case it tells you nothing's there.

Reddit reply — short

Sounds like the 8L90 / 8L45 8-speed transmission shudder issue — well-documented defect on GM (Chevrolet/GMC/Cadillac) 2015–2019, Speerly v. General Motors (E.D. Mich. 2022). If your dealer's tried to fix it 2+ times you may have a case. Free 60-sec check at defectfiles.com.

Driving a GM (Chevrolet Silverado? Run yours through the check.

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