I've removed the bolt from old battery, but it still feels like its attached to something, It slides back and forth but won't lift out. Can someone assist me with this. Will I have a hard time placing new battery?

 

what car is it???

 

chances are there is a clamp on the bottom of the battery which is there to secure it ( don't forget to put the live connection on first then the ground ) this restores the airbags without the SRS light coming on, radio code well its too late for that I hope you have the code

 

Try tipping the battery foreward or rear ward. The lip at the rear of the battery is probably preventing you from lifting it straight out. Tip it rearward and lift.