Chevrolet, GMC, Cadillac, and Buick lemon law claims in California are filed under the Song-Beverly Act against General Motors LLC. GM uses internal dispute resolution and does not participate in BBB Auto Line, allowing California consumers to proceed to civil litigation faster than with BBB-participating brands. Common qualifying defects include 8L90/8L45 transmission shudder (Silverado, Sierra, Camaro, Corvette), 5.3L and 6.2L V8 lifter failures from active fuel management (AFM/DFM), Bolt EV high-voltage battery fire risk and recall, Chevrolet Cruze coolant issues, Cadillac CUE infotainment failures, and Super Cruise software issues.
Notable GM Pattern Defects
- 8L90 / 8L45 8-speed transmission shudder. “Chuggle” at light throttle on Silverado, Sierra, Camaro, Corvette, Escalade; widely documented in TSBs.
- 5.3L & 6.2L V8 lifter failure (AFM/DFM). Active fuel management lifter collapse causing misfires, knocking, engine damage.
- Bolt EV HV battery fire risk. Recall for 2017–2022 Bolt EV/EUV; full battery replacements.
- 2.7L Turbo (Silverado, Colorado). Misfires and turbo failures.
- Cadillac CUE infotainment. Touchscreen delamination and freeze.
- Super Cruise. Lane-centering disengagements and mapping issues.
- Lyriq (Cadillac EV). Software and quality issues on early production.
- Hummer EV. Software updates, charging issues.
- Cruze diesel emissions.
Models Covered
- Chevrolet: Spark, Sonic, Trax, Trailblazer, Equinox, Blazer, Traverse, Tahoe, Suburban, Colorado, Silverado, Camaro, Corvette, Bolt EV/EUV, Silverado EV, Blazer EV, Equinox EV
- GMC: Terrain, Acadia, Yukon, Sierra, Canyon, Hummer EV
- Cadillac: CT4, CT5, XT4, XT5, XT6, Escalade, Lyriq, Celestiq, Optiq
- Buick: Encore, Envision, Enclave
GM Arbitration
GM operates its own informal dispute resolution program. Participation by California consumers is optional and the resulting decisions are non-binding on the consumer. Because GM’s program is not “qualified” under California’s stringent § 1793.22(d) criteria in the same way as BBB Auto Line, California GM consumers can typically proceed directly to civil litigation without the procedural arbitration step.
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