✅ Fixed
Transmission fluid dark brown and smelled burnt. Full fluid and filter service performed. Slipping resolved completely. Now on 30k mile fluid change schedule.
GMC Acadia 2021 Transmission slipping between gears
2021
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🔍 Symptoms
⚙️ Causes
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🧾 Driver Reports
🔗 Similar Faults
🩺 Related Symptoms
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
⚠️ Drive with Caution
Safety Impact
Indirect risk — worth monitoring, not urgent
Urgency Level
🟡 Monitor Closely
GMC Acadia 2021 automatic transmission slipping when accelerating. RPM rises but car does not accelerate. Worse when warm. 159714 km. This fault code is stored when the engine control unit detects a specific fault condition. Common causes include sensor failures, wiring faults, and component wear. Always read additional fault codes before replacing parts — multiple codes together provide a clearer diagnosis. Clear the code after repair and test drive to confirm the fault does not return.
🔍 Symptoms
📍 Automatic transmission slipping between gears
📍 GMC Acadia
⚙️ Possible Causes
Automatic transmission slipping between gears
GMC Acadia
Possible: Transmission fluid dark brown and smelled burnt. Full fluid and filter service performed. Slipping resolved completely. Now on 30k mile fluid change schedule.
Repair / Solution
Based on 119 driver confirmations
⚠️ Wrong Diagnosis?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this 2021 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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