I really, really need some advice, and fast! Here is my situation: Bought my 08 Silverado LS is 2011. It was used, of course, with 39,000. Bought it for 22,500. About January of last year (2013) the ticking sound coming from the motor that I heard one time for about 2 minutes after I had the truck a month, returned. And again, it only last a little while. However, the next day I took it to get the oil changed and low and behold, the sound was happening so there was nothing anybody could do about it. 5-6 months go by, July 2013 rolls around and boom, the ticking sound comes back (it's coming from under the hood by the way) and it's much more constant this time. I take it to the local Chevrolet dealership (not where I bought it from) and they listen to it, and tell me "we hear it but it's nothing that is too serious. If it was more serious, it would be effecting the performance of the truck." Which at the time, it was not. They even noted on the service report: 'making ticking noise, cause unknown.' The technician told me to return if it ever got worse. Fast Forward to now, January 13, 2014, and it finally does it again...except this time in a much larger scale. I pull out onto the highway, truck had only been on for 5 minutes, start speeding up to 55 and out of no where, the tick is back but it's a knock, knock, knock, and the lights on the gauge are flashing, traction control off, stabilitrack off, check engine lights, the whole 9 yards. Thankfully 100 yards away is the same Chevy dealership..I pulled in "hey, here's my truck that you told me to bring back when the noise got worse." 4 hours later I am told this: 1) $2900 to take apart your motor and figure out what the problem is, then pay whatever extra for repair if repairable. 2) $4000-5000 to get a used motor put in 3) $6475 to say forget figuring out your problem, put a new motor in. The other option of course is to look into getting another vehicle, and this is where everything gets crazy: I still owe $14,000 on my truck. I DO NOT have 3 or 6,000 dollars. They said I must pay them that before my truck can leave the premises. What in the world should I do? Never thought I would be in this situation so not sure what to do. The technician told me he can tell I take care of my truck and this was probably something that was begun by whoever had it before me. Especially since there are no service records of the truck prior to me owning it. None. So that means whatever service was done, the owner probably did himself... Please any thoughts are welcome. I have until Friday to make a decision then the dealership said my truck has to be off their lot.