Generally:
* Conventional Automatic Transmission: Older Impalas (pre-2010s) with conventional automatic transmissions often had recommended fluid changes every 30,000 to 60,000 miles. However, many mechanics now suggest more frequent changes, perhaps every 30,000-40,000 miles, especially if the car is used for a lot of stop-and-go driving or towing. This helps prevent premature wear.
* Continuously Variable Transmission (CVT): Impalas with CVT transmissions (some later models) usually have different fluid change intervals. Consult your owner's manual for the specific recommendation. CVT fluid changes are often more infrequent but more expensive due to the specialized fluid and process.
* Modern Impalas (post-2010s): Even with later model Impalas, sticking to the manufacturer's recommended schedule, found in your owner's manual, is crucial. GM has sometimes moved to "sealed for life" transmissions, which means no fluid change is recommended throughout the car's life, while others still recommend a service schedule. The owner's manual is your most reliable source.
To find the correct interval:
1. Locate your owner's manual: This is the most authoritative source for your specific Impala's transmission fluid change recommendation.
2. Check the manual's maintenance schedule: It will specify the mileage or time interval for transmission fluid service.
3. Consider your driving habits: Severe driving conditions (heavy towing, frequent stop-and-go traffic) might warrant more frequent changes.
Ignoring transmission fluid changes can lead to serious transmission problems, costly repairs, or even transmission failure. It's better to err on the side of caution and consult your owner's manual or a trusted mechanic.
