10-speed transmission control-valve failuremajor
The 10-speed automatic's control valve can wear or fail, causing harsh shifting and, in the worst case, a rear-wheel lock-up — recall 26V085 (2022 gas trucks with the ETRS electronic shifter) updates the transmission-control-module software free. Separately, GM's 15-year/150,000-mile Special Coverage for 2021–2022 (from the in-service date, regardless of ownership) replaces a worn control-valve body free, with reimbursement for prior repairs. Test-drive for harsh or delayed shifts and confirm both the recall software update and the coverage window.
Sources: NHTSA complaint database, 2022 Chevrolet Tahoe · NHTSA recall database and manufacturer communications (recall 25V274; transmission-valve and feature programs; recall documents)
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Control valve under 15yr/150k Special Coverage
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Software update under recall 26V085