Question about 1998 GMC Safari

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Need to know location of blend door actuator on 98 GMC Safari.

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Behind the right side of the dash, left side of the main air duct.

Posted on Jul 30, 2011

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Where is the blend door for the heater/A/C for a 1998 Toyota Tacoma 6V


Not sure if this will help.
I have changed a couple blend door actuators, my newer cars were controlled electrical. My Safari was controlled with vacuum line. I could not find where yours is for sure but all that I have changed were behind the glove box and there were two actuators (one on left and the other to the right of the glove box) one was blend door. the last one I changed was a Chrysler 200 it was behind the glove box on the right. The video below FORD is behind glove and to the left side.
How To Install Replace Air Temperature Door Actuator Explorer Mountaineer 98-01 1AAuto.com
https://www.youtube.com/watch?v=g-36aM360V8

Sep 17, 2018 | Toyota Cars & Trucks

1 Answer

Why 2005 pilot gets too much cabin heat even when turned off


There is blend door in vent channels under the dash of the vehicle. It blends warm and cool air in the vents depending on the temperature setting. The Blend Door is controlled by a motor called an actuator that gets its signals from the setting on the dash. When the actuator fails the blend door can't move. If it stops on hot you always get hot air.
3 possibilitys
1. Blend Door stuck.
2. Temperature control not sending signal to actuator.
3. Actuator motor gone bad.

Of the 3 possibilities the actuator motor is the most common and the easiest to fix. The part is $40-90. I don't know exactly where actuator is on the Pilot. My GMC you remove the plastic trim below the dash and its just to the left of the glove box near the 'hump'. Perhaps the part store can tell you or someone else will offer the exact location.

Once you remove the actuator you can plug it back in to the wire clip and move the temperature knob and see if it moves. When you get the new one plug it in and make sure it turns before bolting it in.

To clarify a bit. The heater is never technically turned off. The blend door determines how much it goes thru the vents.

May 04, 2014 | 2005 Honda Pilot

2 Answers

Ac air flo control


You will need to go through your lines on the vacc and find the leak normally its a seal right at the vaccume motor or a cracked tube on earlier years good luck im in the same situation at the moment

Jun 23, 2012 | 1999 GMC Safari

1 Answer

I have a 98 GMC Sonoma and the A/C will not work. It only blows heat even when its in the Max A/C position. Do you think this could be the blend door actuator? It is manual not automatic


Yes - a blend door is definitely a possibility, especially if it blows heat. If the A/C was low on freon - the temperature would be at least ambient temperature.

May 27, 2011 | GMC Sonoma Cars & Trucks

1 Answer

My 99 GMC Safari has heater stuck at 75% defrost and 25% vent...no leg heat...something is stuck...how do I get at it to loosen it up or fix?


blend door actuator is stuck or burnt out or actuator door is jamed
locate and place remove motor actuator check if blend door move freely
if not repair or disloged foring object (pencil pen---comb---etc)
if ok before installing actuator plug back in harness and move selector switch
if it fails check for power if power replace actuator if no power check switch

Apr 02, 2011 | 1997 GMC Safari

2 Answers

Where is the driver side blend door actuator on a 98 Seville STS?


I believe that the right side has a blend door actuator, and the left side or driver side just gets air from the regular flow from the programmer and vacuum motors.

Dorman/Blend Door Actuator
Part Number:
604-106
btn-view-details.png Price: $139.99
Notes: Dorman-OE SolutionsTemperature door. Right

Oct 29, 2010 | 1998 Cadillac Seville

1 Answer

The knob that turns the heater from front to AC to


The cable is probably dislocated from the knob or at the blend door actuator.The cable may also be seized.

Jul 28, 2009 | 2001 GMC Safari

1 Answer

1994 gmc safari,no heat


sounds like a blend door problem gm uses plastic clips to hold actuator rods that tend to break easiest thing to do is take it to a shop that offers free heater checks. and let them check it out

Jan 16, 2009 | 2000 GMC Safari

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