Hey Truck Pros, I know I'm a noob but I read a lot on here and would like to ask for a little input if possible. Today I took my truck in for it's first oil change at a Chevy Dealer since I bought it earlier this year (2003 Yukon XL 5.3). I love this truck and am very pleased with it so far. Anyways, I also opted to have the Fuel Filter replaced and the Transmission Filter/Fluid changed - all for maintenance just because i figured they were due or overdue. The dealer calls and claims I need 2 new belts (alternator and something else), Power Steering Fluid Flush, Brake Fluid Flush AND that all 3 of my Transmission Coolant Lines are "beginning" to seep and they should all be replaced. The Dealer Quotes are: Transmission Filter/Fluid (no flush) - $150 Fuel Filter/Oil Change/Tire Rotation - $120 (what?!?!) The belts were quoted at $175 Power Steering Flush - $118 Brake Fluid Flush - $138 3 New Transmission Coolant Lines - $607!!! So anywho, I elect to go ahead and do everything except the transmission lines for a hair over $700. This is steep but it's at the dealer and whatever - I can at least do my own oil changes moving forward. My question is - can I ask this group how critical it is to replace these Transmission Coolant lines? I'm remotely knowledgeable about vehicles and I understand these are for cooling the tranny and I guess it's tranny fluid seeping out ever so slowly. The dealer rep said I could technically just keep an eye on the tranny fluid level but that "they could break". He explained the seeping is where the metal meets the rubber I guess. In addition, the truck has about 160k on it, and the transmission doesn't seem to be perfect (little hard 1-2 shift when warmed up, slight delay once in a while when downshifting). I do plan EVENTUALLY to get a full rebuild of the tranny and possibly replace the coolant lines at that time. Thoughts? Any input would be appreciated!