Wiper problems of the 1997 Chevrolet 1500

I got the truck in 2011 and when the title came in the mail it had a note that the truck had been a dealer lemon law buyback. My problem now is the check engine light is on. I called Chevrolet for some assistance and was told to have a Chevrolet dealer diagnose the problem. The dealer wanted to replace most of the check engine related parts and sensers at a cost to me of about $4000. 00. I think that I am being over sold. I paid the $85. 00 and had 2 other test and 2 different diagnose cost from $1500 to change injectors. Another. Gm recall but mileage problem. Chevrolet declined any help. I think if it was a lemon there must have had a big problem. I would like to keep the truck it still looks good. Also the wipers don't work at times there was a recall on them but age and miles may be a problem. I could use some help. Thank you.

Windshield wiper defect: windshield wipers fail to operate correctly, or at all, during adverse weather conditions. This equipment failure puts a driver and all passengers at risk of harm due to inhibited visibilty. Have had to suddenly change lanes on highway during heavy rain, pull off, stand on edge of door trim with traffic driving by, and push the wipers manually up and down to get them working again. Sometimes I will have to open the hood of the truck, push the fuse tight, push the wipers to start them, and then go. Our 1996 chevy suburban was recalled due to a windshield wiper defect, they have worked fine since the windshield wiper component was replaced. . I have contacted our local chevy dealership twice to have the windshield wiper defect repaired on the 1997 c1500 truck. Since the previous owner did not do it while it was under warranty, and the VIN number on the truck does not fall under the recall ( the service manager pulled up the recall and checked the VIN number of our truck against the numbers on their list on 08/06/2011 at 12:20 p. M. ), they will not replace it. This is because, as it is now not under warranty, they would not be reimbursed by gm, regardless of my reminding them that not replacing it remains a safety risk to the owner of the vehicle. This has began in 2001. Since our son is going to get his license, and would like to have the truck, I would like to ensure his vehicle is a safe one. If I had known where to file a complaint regarding this matter, I would have done this 8 years ago. The dealer told me there was nothing they could do, except replace the part.