To find the correct torque specification, you must consult your owner's manual. The manual will specify the exact torque in foot-pounds (lb-ft) for your specific vehicle.
Failing to find your owner's manual, you can try:
* Chevy's website: Search their website for your specific year and model Impala. They may have a downloadable owner's manual.
* A reputable online parts store: Sites like AutoZone, Advance Auto Parts, or others often have online manuals searchable by vehicle information.
* A local mechanic or tire shop: They can likely look up the correct torque spec for you.
Using an incorrect torque spec can lead to loose lug nuts (dangerous!) or stripped threads (expensive!). Always prioritize finding the correct information from a reliable source before tightening your lug nuts.