Truck:
2006 Sierra with a 5.3
Issue:
Cooling system does not hold pressure
Steps taken to fix problem:
New thermostat
Bled air from system
Taken to stealership, only for them to claim it was "normal"
Printable View
Truck:
2006 Sierra with a 5.3
Issue:
Cooling system does not hold pressure
Steps taken to fix problem:
New thermostat
Bled air from system
Taken to stealership, only for them to claim it was "normal"
Did anyone start with the simple stuff, like checking the pressure cap? Is there a visible coolant leak? Smell? How could a thermostat contribute to the system not holding pressure? Hope the Stealer didn't charge anything.
I hate to ask stupid questions but how do you know it isn't holding pressure are you using a pressure pump which goes in place of the cap. Perhaps you are going by the pressure after warming up. You haven't given us much to work with here. I assume you have verified that pressure is being lost not being cancelled by contraction from cooling. I will be glad to help if in fact you have confirmed the loss of pressure. The thing about cooling systems which lose pressure they show up pretty easily by doing a pressure test with a known good test set.
shane
Methinx this thread....is ded.