It does not have a timing belt. It has a timing chain which is normally good for the life of the engine.
It has a timing chain that should last the life of the engine.
It is recommended that you replace the timing Chang, on your Chevrolet Silverado pickup truck, at 60,000 miles. Many times the warranty is voided if the timing chain is not changed.
timing chain
Chain
It has a timing chain, NO BELT
it has a timing chain. not a belt
No belt. It has chain and gears.
with a timing light on the hermonic balancer NEW ANSWER: The timing is not adjustable, it is controlled by the computer.
A 2003 Impala does not have a timing belt. It has a chain.
timing belt
That truck does not have a timing belt. It has a timing chain that will last the life of the engine.
How to time a 6 cylinder motor