Can i use rubber line instead of metal line going into the radiator

Probably transmission cooler lines. Could be engine oil cooler lines. Been a while since I seen one of these. They do go to the radiator or cooler in front of the radiator. You'll have to crawl under it and see where the go. Transmission or oil filter. Neither is a fun job. I definitely wouldn't do this on the ground. You can not cut the lines to get them out. You need to watch how you get them out. One first then the next. They have to go back the same way. Most older ones come out threw the back. You have to twist and turn them to get them out and in(pay attention to this also). You can bend the lines some, Just don't be extreme with it.

Those hoses go from the transmission to the radiator. The radiator will have, along one side, two connections for the trans lines. The radiator has an internal plate that allows engine coolant to cool the trans fluid. The hoses from the trans should terminate to some metal piping with flare fittings that attach to the two ports on the radiator.

if their metal, the could be coming from transmission fluid lines, are they going into radiator ? one @ top & one @ bottom of rad . their cooling lines from trans, supply / return . if rubber lines, they go to a transmission cooler , looks like a small radiator, rectangular , supply / return. power steering has no cooling . these lines don't come from engine, power steering has power steering fluid NOT TO BE MISTAKEN FOR TRANSMISSION FLUID, TOTALLY DIFFERANT !!!!!!

no that does not seem right, you are being taken for a long ride ! have a friend or someone you can trust who can work on it. and go to a auto parts store if you need parts. its a lot cheaper if you do not have to take it to a dealer. have a good day !

buy a trans cooler and run the lines to the cooler instead of the radiator, plug off the holes to the radiator, make sore you flush the radiator before running the car

sounds like you have a cracked tank on your radiator. you need to have this fixed ASAP or you will blow a head gasket.

Most likely the rubber hose at the end of the metal trans lines, where they connect to the bottom of radiator
I would disconnect at the trans,cut the rubber hose off,and lay it out on the gound,where you can carefully cut off the furrell and just replace the hose using a clamp on both ends.

There is a short stub line coming from the radiator that joins the rubber line to the radiator. squeeze the tabs on the plastic part on the metal line and the rubber part will separate from it. When replacing, be sure it has locked together or you can have a problem.

It is ok, as long as the hose is for fuel, and the hose is designed to withstand the pressure,and everything is done tight without leaks.

I know the earlier tahoe's have two heater lines running from the engine compartment to the rear under the vechile. Those lines could be clogged or pinched shut. What you do is get two hose locking pliers. Go under your truck, they are two metal lines that turn into rubber and back into metal again farther down the line. First, checked for pinched lines. If none, find where the rubber hoses are, clamp them off, remove from metal lines and drain. Use garden hose to flush fresh water through. When water comes through at high pressure and pretty clear, it should be done. Reconnect hoses, top off radiator fluid and it should be fine.