Transmission valve body shift failure
POWER TRAIN
9 NHTSA complaints · 2025-05 → 2026-07
“Was driving and vehicle went into neutral and reduced acceleration drive with care message along with a illumination of a engine appeared on dash, dealer diagnosed faulty valve body on transmission”
“While driving on the freeway with my family in the middle of a snowstorm, my 2025 Silverado 1500 with 8,000 miles on it, suddenly dropped gears down to 1st without warning”
“Violent shuddering, as if vehicle does not know what gear to be in. unpredictable harsh and delayed gear changes”