ive got a 95 blazer and i just did some minor work... i e replaced the door jamb switch, the ac switch rheostat, and replaced some gauge cluster bulbs. so anyways, when i started it up, there was a weird burning smell and a low humming sound. it doesnt perform any diff, but im scared. it has only 69k on it. some1 please help, im suppose to go on a 3 hour drive tommorow!!

The Noise Is Coming Somewhere Right Around The Altenator Maybe Below It Or Around It, Im Not Sure, Its A Weird Burning Smell, Not Common?

Could be your belt?

or your alternator bearing going out.

Is the sound like a high pitch whining?