I have a cadillac 3.2v northstar 1998model.an error displays check gas cap. on 1998 Cadillac Catera

and also service engine soon displays continues

Asked by for the 1998 Cadillac Catera
1 answer
gross vacuum leak in the evap system. gas cap is a common failure but could be many other things.

you need a shop to help you with this.