According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2019 Chevrolet Tahoe has 7 documented known issues, with 3 rated critical. The most serious are 8L90 8-Speed Transmission Shudder ($500-$4,500 repair), AFM/DOD Lifter Failure - V8 Cylinder Deactivation ($3,000-$6,000 repair) and VVT Cam Phaser / Timing Chain Cold-Start Rattle (5.3L) ($1,200-$3,500 repair). Across all issues with published estimates, repair costs range from $300 to $6,000. DIY maintenance guides at au7o.io.