check engine light comes on when idling on 1995 Chevrolet 1500 Pickup

check engine light comes on when truck is in park and idling,when put in drive and moving light goes off .what could be the problem

2 answers
When a check engine light comes on, there are many possibilities as to what it may be. You should get a diagnostics test done and see what code your vehicle is giving out.
You need to have a shop scan the codes to figure out what is making the check engine light to come on. I think Autozone still does this for free