While on the expressway driving at highway speed the engine started backfiring and many codes were displayed on dashboard including â rear drive disabled❠â service ECU❠and many others. Pulled over and Had GMC Yukon towed to dealer. Iâve seen many complaints of the same thing and found this recall on your site GENERAL MOTORS DCS6866 URGENT — DISTRIBUTE IMMEDIATELY Date: April 24, 2024 Subject: N232413430 — Customer Satisfaction Program The dealer said they would fix broken valves and I would have to pay for the new computer thatâs not under warranty.