Follow the TOP radiator hose to the front top of the engine and you will see were the hose CLAMPS to a housing. It will be under that housing.
low radiator fluid or a possible bad thermostat.
Located inside fuel tank
No it does not.
R134a
Drain the water from your 1997 GMC Yukon cooling system. Remove the water supply hose. Remove the thermostat housing retaining bolts. Remove the old thermostat and replace with the new thermostat.
The thermostat is located on the engine on a 1998 GMC Sierra 1500 standard. The thermostat can be found by following the upper radiator hose directly to the thermostat,
In the fuel tank.
The thermostat on your 98 gmc is located in the intake manifold where the upper radiator hose connects to the intake.
the thermostat should be located on the engine side of the top radiator hose, new rubber seal is important and no gasket sealer is needed.
Just follow the top hose, from the radiator, to the engine block. It will be at the end, on the engine block
looking for help on the brake light ground wire location for 1999 gmc suburban 4x4
In side the fuel tank