Question about 1995 Pontiac Bonneville

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I have a 1995 bonneville ssei and just changed the water pump .Now i have a problem getting heat and I noticed the temp light to tell you how hot the air is blowing blinks 90 degrees .anti freeze level ok

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Could be when you changed the water pump you dislodged something into the heater core clogging it. To replace this find an expert mechanic on Pontiacs. "Trust Me" or This sounds like a problem with the vacuum controlled trim door actuator. The trim door is a pannel that lets air blow through the heater core. If the actuator is bad it will not open the trim door and you will have no heat. This is a very difficult proceedure to fix for the novice. To manually open the trim door you have to take out the glove compartment. Behind that you will see vacuum lines, they are connected to the trim door. to disable the trim door from closing you have to gain access to the top of the actuator. Diconnect the pushrod from the 2 levers it connects to. Start your car and turn on the blower. Turn the levers that the pushrod was connected to adjusting to see when you get the most heat. Weadge something under the lever to hold it in place and you should have heat. This is a temporary fix. Best fixes are by expert mechanics, not by rigging, or putting a bandaid on the problem. Hope this helps....

Posted on Sep 15, 2010

  • Jonathan Stotts Nov 06, 2011

    Will this work on a 93 bonneville as well? Like will i find the actuator in the same spot? Im having a problem not getting enough heat but car is running normal temps. I just put a 190 thermostat in and flushed cooling system and fresh antifreeze but still doesnt get warm like it should.



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