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What does it mean when a Cadillac displays 'Transmission Service Required'?

2 Answers

MargaretMarie

07/28/25 6:42pm

Cadillac displays 'Transmission Service Required' for the following reasons and solutions: 1. Transmission control module program issue: Most owners who encountered the transmission service warning light found it automatically disappeared after restarting or during normal driving, which is essentially a false fault code. 2. Untimely transmission fluid change: If the transmission fluid is not changed on time, excessive impurities can cause unstable internal oil pressure, triggering the transmission service warning light. Simply changing the transmission fluid will resolve this. 3. Damage to internal transmission components or solenoid valve issues: The internal transmission parts are wear-prone components. Over time or due to quality issues, excessive debris can clog the solenoid valves, necessitating replacement.

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SanAngelo

08/12/25 12:11am

That day, my Cadillac suddenly displayed a 'Transmission Service' warning, and I panicked. After checking, it was likely a transmission issue—possibly low fluid level, overheating, or a sensor false alarm. A faulty transmission makes driving dangerous, often causing shaky starts or jerky gear shifts. I immediately pulled over, didn't dare to drive further, and called a tow truck to take it to the dealership. The diagnosis revealed the transmission fluid had degraded and aged. Spending a few thousand to replace the fluid fixed the issue. I recommend all car owners not take chances—regular maintenance and fluid changes every 60,000 km can avoid this hassle.

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