Question about 1998 GMC Jimmy

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Inside ac actuator plastic gear:where can I buy this?

Ac quit working on 1998 jimmy so husband removed actuator and the plastic gear was broke. Can I buy just this gear or do I have to buy whole actuator

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Unfortunately, you will not be able to just purchase the affected gear in this case. you will only have access to the entire Actuator. There are no parts that can be purchased separately at this time.

Posted on May 31, 2009

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My 98 olds Aurora is blowing cool on driver and hot on passenger when i have AC on... What could this be and how do i fix it???


Is it dual climate control? The passenger side is stuck on heat mode. A door, inside the heater/AC case (up under the dash) for the passenger side, that closes off air passage to the heater core and redirects it to the A/C portion, is not closing. They get stuck, or broken with plastic stripped gears, or the actuators that move the doors quit working or quit getting a signal to work from the control unit on the dash.

Fixing it can get excruciating, I mean down right aggravating. I'm only warning you, so when you do it yourself, you can rate it on a scale of easy to dante's tenth level. It puts me in a manic-depressive state for days, and I used to enjoy tearing cars apart! Maybe I exaggerate. Some blend doors are easy to get at, but some models require the dash removed just to get access. Start by pulling off the sound insulator panel under the dash. Then with key on, operate the controls on the control panels, from heat to a/c and so forth. Listen for sounds like a thump from a stuck door, or clicking from stripped plastic gears. You just have to listen and look if you can see anything amiss. If you spot one of the doors or its actuators (the actuators are either tiny motors or are vacuum operated diaphragms with large canisters) not working right, you have to judge how much further it takes to repair it. Don't be discouraged, but cars these days are not very owner-friendly.

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Rear AC / heating thumping sound


Yes the noise can be gear "jump" over, the teeth don't break since they are nylon in most cases. This is most often caused by a sticking/warped air temperature control blend door.

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The tail gate and rear window will not open although I hear the electric release motor operate


I had the same problem with my 2001 Blazer. Just remove the panel by the screws located on the side of the tailgate, the problem was a bad actuator which pulls the lever to open the glass hatch. Once you take off the panel, remove the metal shield on the tailgate and the actuator will be mounted on the back of it. There are several ways to open the hatch on blazers and jimmys. You can try to release by inserting a small screwdriver and pushing left using the entry hole in the rear hatch deck just below the plastic trim in the center. This works ok unless the latch is out of alignment. The quicker way to release the window lock is to pull the center of the plastic trim (where it rises) toward the inside of the car and break the plastic trim attachment. Remember first to remove the hatch handle.By pulling away from the window, you can then insert a finger between the two walls of the lock assembly and push down. The window will open immediately. Ignore the broken trim attachment as there is plenty of support for the top of the door trim piece. Unbolt the 9/32 panel screws and the two phillips head side screws and the panel will come off. Careful of the rods clipped to the panel. They come off easily as does the hatch door activator. Rather than have to buy an actuator because the blue piece of plastic broke, replacements are available at online auto supply stores. Remember to make sure that the lever of the actuator hits the window release mechanism squarly. A little bending with pliers will align these two pieces so they strike evenly.

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My 1998 Jimmy ac motor is working but it is blowing hot air out the vents


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Heater door clicks all the time when car is running on 93 town ca


Check the blend door and other actuators. May be disconnected.

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No heat in 98 jimmy. Replaced water pump,


Possibly.. the actuators which operate the doors actually have a position signal for reference, but the actual motors inside the actuators dont realize there is a limit and overshoot their limits causing the fine wires inside to rip apart rendering the actuator scrap but this happens when actuators are still plugged in to the connector while being taken off the heater door, and they can and will still move with the key in the off position if the actuator thinks it not in the proper position..thats how they work anyway.hope you had them unplugged untill the last, then this would'nt happen....hope this explaination helped

Dec 06, 2009 | 1998 GMC Jimmy

1 Answer

The heater in my 1998 Lincoln Mark VIII LSC doesn't get warm. The fan works and the AC works, just no heat. How do I fix it?


You have a problem with your blend door actuator. Every year, twice a year, my husband manually moves the blend door actuator and puts a tie wrap on it so it will stay in either the heat or cool position. You can reach this through the glovebox, which you will need to remove. I had this fixed at the dealer once long, long ago - very expensive because the plastic piece that needs replacing means they must remove the seats and the whole dash area including the steering wheel to properly replace what is broken. If you want to see how that is done go here: http://www.mechanixtrix.com/Article/Article.aspx?ArticleID=145 Much easier going through the glovebox.

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Mar 06, 2009 | 1998 GMC Jimmy

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1995 Jimmy 4d 4wd rear lift gate will not open -


I was able to get two wedges between the glass and the plastic trim. From that I used a scope to see inside and find the mechanism to release the window. Look for the one piece of plastic in the mechanism. The level has to be pushed toward the driver side of the car. Once I got the glass open, I removed the handle, and two screws from each side of the trim and removed the trim.

Once the trim was removed I had a small opening and could see the problem. The end of the latch has a small blue plastic (why plastic??) catch that broke.

Rather than taking the door apart and finding a replacement, I heated a screw driver and made a slot in the plastic. Next I used a heavy duty zip tie and connected the two pieces (plastic catch and metal part that opens the latch). I left some slack in the connection and all works great.

Not sure how long this will last, but for now I have the back opening. I will look at replacing the plastic piece, but not sure if a total new mechanism is needed.

Stan

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