There’s something wrong with several General Motors crossovers, and the automaker seems unsure of how to fix the issue. Customers have been complaining of a “Service All Wheel Drive” or “Service 4WD” message appearing on the driver displays of Chevrolet Traverse, GMC Acadia, and Buick Enclave crossovers, and according to January service bulletin PIT6479, technicians have been instructed to disconnect the battery for a period and then restart the affected vehicle before returning it to the customer. Little more can be done at this stage because GM’s engineering team is still investigating the root cause of the issue to develop a permanent fix.
More Details on GM’s AWD Issue
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The problem affects certain North American examples of the 2025-2026 Enclave, the 2024-2026 Traverse fitted with the LK0 2.5-liter turbocharged four-cylinder engine, and the 2024-2026 Acadia, with all affected vehicles equipped with RPO code F48 (all-wheel drive). These vehicles store error code U3000 Sym 92 as either a current or past fault in the K47 rear drive control module, with customers reporting that the aforementioned warning is displayed when they first start their vehicles, with the AWD system appearing not to be active. Faulty AWD is especially concerning when customers are in the depths of winter, battling for traction, and although a permanent resolution has yet to be determined, it’s worth visiting a dealer for the interim fix, as it may make the AWD system function more or less as intended, at least temporarily.
GM’s Temporary Fix Comes After More Severe Issues Elsewhere
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Technicians have been told to disconnect the battery for 20 minutes to reset the faulty module. Thereafter, they must perform a full vehicle power-up and power-down cycle, log into GDS 2 (GM’s diagnostics software), and clear all diagnostic error codes. On returning the vehicle to the customer, technicians should inform them that, although the vehicle is safe to be driven, the warning message and potential AWD faults may recur until the engineering team figures out how to deliver a permanent fix. Whatever the solution, it sounds like the problem may be software-related, rather than a mechanical failure, which could indicate that the ultimate fix will be simple to apply.
GM Authority reports that the Traverse and its corporate cousins have also suffered from issues including engine coolant troubles, low oil pressure warnings, and problems with transmission components. Sadly for GM, this crossover isn’t creating the only reliability-related question mark for the company after a recall for almost 600,000 vehicles with L87 V8 engines recently led to multiple lawsuits.
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