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The first thing to do is check the radiator, not the overflow tank, to be sure it is full. Next, with the engine warmed up, feel both heater hoses. They should be the same temperature. If not then the heater core is stopped up and will require back flushing. If they are the same temperature then you will most likely have a blend door problem.
What else can I help you with?
I am Having problems with your heater core removal on a1999 gmc sierra 4.3l?
Well get a new car and then work on this peace!
How do you install a heater core in a gmc sierra 1500 4.3L v6?
how do you install a heater core for a 2003 gmc sierra 4.3l truck
Are there problems in Sierra Leone?
Every country has problems.
How do you replace 2004 GMC sierra heater core?
I believe the heater core in that vehicle is located behind the dashboard.
Where is the block heater in the 2008 gmc sierra?
I don't know either
Where is the fuse for the block heater?
we are looking for the fuse for the block heater in a 2002 gmc sierra duramax. can you help? the diagram does not show
How do you replace 1994 gmc sierra heater blend door actuator?
bs
How do you replace the heater core on a 86 GMC Sierra Classic?
To replace the heater core on a 1986 GMC Sierra Classic, first disconnect the battery and drain the cooling system. Remove the dashboard and the heater assembly by taking out the necessary screws and bolts. Disconnect the heater core hoses from the engine compartment, then remove the old heater core from the heater box. Install the new heater core, reassemble the heater assembly and dashboard, and refill the cooling system before reconnecting the battery.
How do you replace heater core on 2000 gmc sierra 1500?
take the dash apart and remove nessesary items to replace heater core
How do you change the heater core in a 1998 GMC Sierra 1500?
You don't From, Gabe Higbee
Where is the heater coil located in a 95 cutlass sierra?
The heater CORE is located inside the vehicle, passenger side, behind the dash, mounted on the firewall.
What were some of the problems of the 2002 GMC Sierra?
There is some debate as to what problems one might experience with a 2002 GMC Sierra. One of the most noted issues, however, was that with the starter.
