It doesn't have a timing belt. It has a timing chain and it will last the life of the engine.
The timing belt should be replaced every 100,000 miles.
On a 2001 Chevrolet Impala : Both the 3.4 and the 3.8 litre V6 engines have a timing CHAIN
The 3.4 liter V6 engine in a 2001 Chevrolet Impala has a timing CHAIN
105000 mi
All Chevrolet Impala's have a chanin that requires no maintenance or replacement under normal conditions.
Normally it will last the life of the engine and is replaced when the engine is overhauled.
why won't a 2001 Impala shift into high after it warms up? All shift sensors have been replaced
Should be replaced every 105,000 miles.
From what I've seen it appears to be 10 years or 105,000 miles.
Every 90,000 miles per Mazda
You are correct that the SL2 uses a timing chain. However, since it uses a timing chain it does not need to be replaced as does the timing BELT. In general, a timing chain should last the life of the engine.
They should all impala's from 2000-2011 have the same bolt pattern 5x115