general problems of the 1998 Chevrolet Blazer

The back seat middle buckle broke into two pieces and now it is broken, then the right side back seat buckle is in some kind of locking mode and then the right side passenger selt locked up too a few days later. Now I have only two selts belts that work in the SUV. I have called the local chevy dealers hoping that they could help with this problem but they said it would be almost 400. 00 to fix this problem. My brother owned a 1990 Honda civic and brought it to a Honda dealer and they fixed it at no cost because selts are safty issue and have a life time warranty. I thought chevy would have the warranty but the chevy dealer inform no and never will that happen. Please help try to fix this problem. I am a single mother of four young children and if it possible to do myself, I am willing to do it, because this is my own only transportation to get to work and school for our family and I can not use my SUV until I have get this safety issue worked out. Please please help me. I have purchased four belts for my pulley for my SUV and still have the same problem. Its sounds like a squeaking and whistling. I have had replacement it myself the first time but it still did the same thing so I brought my car to local mechician and still no luck, so I bought it to chevy it worked fine for a few weeks then started it again, so new one was put on. Then a couple months later it started again, so they put another new belt, then it started up again a few months later but the one year warranty time was up,but it it still does it. Is this normal?.

Seat recliner handles just break off this is common on all Blazer with the same reclining bucket seats the part is 70 bucks a side 2 hours labor per side! and the passenger side has hardly ever been used that just broke off I have addressed this problem with gm and they coz my car is a 98 there is nothing they can do this is a big safty issue and every Blazer person I have talked too has had the same problem.