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www.fixya.com/cars/t3213136-replace_broken_rear_coil_spring_pontiac Oct 17, 2009 - replace broken rear coil spring on pontiac montana - Pontiac 2000 ...Im having problems with my rear lighs on my 2001 pontiac montana, the ...
CHECK THE HIGHT OF THE HEATER MATRIX IN THE CAB , IF ITS HIGHER THAN THE FILLER/EXPANSION TANK. THEN ITS AN AIR LOCK, LOOK FOR THE HIGHEST PIPE AND SEE IF THERE IS A BLEED VALVE, IF NOT TAKE BOTH PIPES OFF THE MATRIX FEEDS AND FLUSH OUT TO SEE IF IT IS BLOCKED, AND RECONNECT LOWEST PIPE FIRST AND FILL SYSTYM TILL WATER APPEAR FROM TOP AND RECONNECT RUN MOTOR, AND KEEP TOPIN UP
If the heater core is good and the blower works, the valve doors may not be opening and closing properly to direct air towards the proper vents. This may be because something has fallen in and is obstructing their movement. The actuating motors may not work properly, or the linkages that connect them to the mode doors may be worn or improperly adjusted. You can get a look at the mechanisms by removing the driver side knee bolster (two screws) and a lower trim panel on the side of the center console.
Be careful fiddling with the linkages. Everything is plastic and easy to break, and replacing the heater box requires removing most of the dash.