your vehicle does not have a t-belt-uses timing chain and gears which doesnt need to be replaced until around 150-200 thousand miles or incase of premature failure
It has a timing chain.
where are the timing gear marks on a 1997 chev s10 2.2 located
How to replace a 1985 Chev Suburban's timing chain
It must have a timing CHAIN , the Gates website ( they make timing belts etc . ) does not list a timing belt
It must have a TIMING CHAIN because Gates ( they make timing belts etc . ) does not list a timing belt for the 2001 Chev Cavalier 2.2 L
The 1.6 liter , 4 cylinder has a timing BELT and the 2.0 liter 4 cylinder and the 2.5 liter V6 engines use a timing CHAIN
cost to replace timing gear on 1996 chev s10 4.3
It must have a timing CHAIN because Gates ( they make timing belts etc. ) doesn't list a timing belt for the 2004 Chev Malibu 3.5 liter V6
The 3.4 and 3.8 litre V6 engines in a 2000 Chevrolet Impala have a timing CHAIN
It must have a TIMING CHAIN because Gates ( they make timing belts etc. ) does not list a timing belt for the 2.4 liter 4 cylinder in a 2009 Chev Malibu
Since this category is 305-350, I'll have to assume that YOUR engine is one of the two mentioned. The 1990 Chev 305 and 350 did not use a timing belt. They used a timing chain, and unless something really odd happened, you should never need to replace the timing chain until you rebuild the engine.
The Chev 350 and the 6 cylinder do not use a timing belt; they use a timing chain. You need to pull the front engine cover to get to the timing chain. That means pull the harmonic balancer, water pump and anything else on the front. However... they do use a serpentine belt to drive the alternator, water pump, power steering etc. To loosen the serp belt, you should be able to just loosen the tensioner.