95 Chevrolet Blazer LS, 4x4, 4door, auto. My problem is that if you step on the gas and then let your foot off it you hear a rattling noise under the car. 2nd the A/C. sometimes when its off you can hear a rattling noise from it and othe times its fine. just replace the refigant. 3rd. just replace my 2 front tires and got an alignment tires has uneven wear and went right if i held the stearing straight. was wear on the inside of both front tires. after i got the tires and alignment done it still goes right. and took it back to the shop and they rechecked and said the switched both the front tire. left tire put on the right and right put on the left. but it still goes right. IDK if this has anything to do with it but i looked under and noticed that my looked all rusted unlike the other i see that are white, yellow, red, blue, etc. so i ont think that they ever been replace.plz hep