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  1. 6.5L Diesel Engine
    I just bought a 1993 GMC C3500 with a 6.5 Turbo. I know NOTHING about 6.5s but I've always wanted one. This 6.5 has a cooling issue that I believe from my time wrenching is a head gasket. When I bought the truck it ran at 180, but the lower radiator hose was barely connected to the radiator...
  2. 6.5L Diesel Engine
    So I put a gallon of engine coolant in my 93 chevy on Sunday. I popped the hood on Thursday and the tank was bone dry. Didn't get a notice on my dashboard while I was driving nor on start up. Also didn't find any leaks on the ground of the truck. Any ideas where my coolant is going? Have to...
  3. 6.5L Diesel Engine
    I replaced my radiator and no I have no heat coming out of the heater. I am thinking there is air in the cooling system Now I did make a mistake when filling it up with coolant. I forgot to open the pitcock on the thermostat housing. But now before I add coolant I do open it. I have only got...
  4. Duramax Second Generation: 2004.5-2005 (LLY)
    Give you the back story. A year ago my truck started slowly pushing coolant out of the coolant reservoir. I changed the cap and the issue lessoned. 2 months later the coolant low level light came back on. I was back to putting coolant in every 2 weeks. Then the upper rad hose sprung a leak...
  5. Duramax Fifth Generation: 2011-2016 (LML)
    Like the tittle says :16 LML coolant do not go back to pressurized side when cool off. the coolant stand in the middle Of the pressurized side and do not pull back what is in the overflow when cool off. Top rad hose is soft in the morning, new thermostat and new coolant tank . ( weird is when I...
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