if i do nothing will it get worse on 2001 Chevrolet Express 1500

engine runs rough..could it be fuel pressure regulator? light does come on. what other reasons for engine running rough? had tune up and fuel additive.

Asked by for the 2001 Chevrolet Express 1500
There are many different things could cause that.
You really need to get it diagnosed by a shop to see what causing the problems. They should be able to pull out diagnostic trouble codes from the affected modules and be able to estimate the parts and repair cost for you.

1 more answer
have it put on a computer ck code