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An Engineer Explains GM's Valve Body Failures: Will A New Repair Be Enough for HD Owners?
Waiting on a valve body for your GM diesel's 10-speed automatic? There's potentially good news and bad news.
In early August, GM finally opened a gap in the floodgates when it released a revised valve body and updated repair procedure for its gas-powered pickups, introducing new replacement parts to the pipeline and making life much easier for those customers experiencing the issue for the first time. “Ten-speed transmission valve body replacement parts availability for both light- and heavy-duty diesel engine pickups is improving,” said Bill Grotz, Global Public Policy and Regulatory Communications Senior Manager at General Motors. And because that happened before any updated parts or repair procedures could be spun up, GM instead implemented a band-aid fix that preemptively disables shifts into higher gears when the early signs of valve bore erosion are detected.
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