GM’s Three-Row Midsize SUVs Suffering From AWD System Issue
If you happen to own a late-model Chevrolet Traverse, GMC Acadia or Buick Enclave, you may have seen a warning message pop up on the digital instrument cluster telling you there may be something wrong with the all-wheel drive system.
General Motors is aware of the situation and issued a preliminary information service bulletin (PIT6479) in January. It refers to a "Service All Wheel Drive" or "Service 4WD" message that appears when starting the vehicle, as well as "U3000 Sym 92" set as a current or history code.
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More specifically, the affected models include certain 2024-2026 Traverses and Acadias and 2025-2026 Enclaves.
The service bulletin mentions that some drivers may complain that the all-wheel drive system doesn't work properly at times. In fact, it’s easy to find posts about this on online forums and social media.
GM engineers are still investigating to determine the cause of the problem, so a permanent fix isn't available yet. In the meantime, owners who see the message on their Traverse, Enclave or Acadia can visit a local dealer where a technician will disconnect the 12V battery for 20 minutes to reset the affected module, then reconnect the battery, perform a full vehicle power-up and power-down cycle, log into GDS2 and clear all diagnostic trouble codes.
The service bulletin goes on to say that the vehicles can be driven normally afterward, but that the message may reappear later. It will be updated or replaced with a formal service bulletin once a fix is found—likely a software update.
To be clear, no safety recalls have been announced to date.
Unfortunately, the AWD system issue is far from the only problem plaguing GM's three midsize SUVs since their redesign. The transmission, engine cooling system, braking system and headrests have all experienced troubles. In fact, the Acadia recently topped the list of 2026 models with the worst predicted reliability according to the U.S. magazine Consumer Reports.
