Why is my GMC transmission stuck in 1st gear?
Why is my GMC transmission stuck in 1st gear? See GMC Transmission Rebult Kits . Clogged or faulty shift solenoids, resulting in electrical glitches or jammings. If the fault is electrical, it may trigger a check engine light. Mechanical issues and clogged solenoids will rarely result in a check engine light. Missing higher gears or transmission stuck in 1st gear. What are the symptoms of a GMC transmission problem? GMC vehicles with 8-speed 8L90 and 8L45 transmission have a widespread problem known as ‘Chevy shudder.’ The symptoms that may happen during gear shifts and typically include shaking, juddering, and harsh...