2008 xl heater

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johns2008

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By using the push button switch the heater fan will turn on ,, at times it won't. I found the fuse to the heater switch(motor) and replaced it as the blower was working. My next move is to locate the plugins to the wiring and check for burn features. I don't know where they are. Am i correct in this analysis.
 

Doubeleive

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By using the push button switch the heater fan will turn on ,, at times it won't. I found the fuse to the heater switch(motor) and replaced it as the blower was working. My next move is to locate the plugins to the wiring and check for burn features. I don't know where they are. Am i correct in this analysis.
I would pull the fan/motor out and look at the harness and inside the female portion on the heater fan motor, mine was burnt inside so I replaced the motor and the connector.
it's on the passenger side under the glove box, you have to remove the cover that goes from the center hump over to the passenger door under the dash, takes a 7mm socket you will want a deep socket for the bolt on the far left hand side it's real pita to get to, once that left bolt is loose you can pull the cover out at an angle so you can access the blower motor. If you discover it is bad or going bad I would recommend a oem replacement, no china junk
**the motor is removed by twisting it (clockwise i think)and it has a plastic lock tab and may have 1 screw also, use a flashlight it's dark under there
 

Geotrash

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I would pull the fan/motor out and look at the harness and inside the female portion on the heater fan motor, mine was burnt inside so I replaced the motor and the connector.
it's on the passenger side under the glove box, you have to remove the cover that goes from the center hump over to the passenger door under the dash, takes a 7mm socket you will want a deep socket for the bolt on the far left hand side it's real pita to get to, once that left bolt is loose you can pull the cover out at an angle so you can access the blower motor. If you discover it is bad or going bad I would recommend a oem replacement, no china junk
**the motor is removed by twisting it (clockwise i think)and it has a plastic lock tab and may have 1 screw also, use a flashlight it's dark under there
+1. I would replace the fan motor. I had a similar problem on my 2007 and a new motor cured the problem.
 

EddieC

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Resurrecting the thread for our 2008 Z71 Tahoe.
Today the front heater motor started squeaking and it is 8 degrees out there so it's of high interest.
Using our VIN it seems like several GM parts sites list GM 22741027 that is pretty pricey.

Looking on RA there are many motors that are significantly less expensive, including two GM motors but the (GM's) part numbers don't matchup and it's not a given that the aftermarkets are a correct match.

Curious if anyone has used an aftermarket fan motor.

 

Doubeleive

Wes
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Resurrecting the thread for our 2008 Z71 Tahoe.
Today the front heater motor started squeaking and it is 8 degrees out there so it's of high interest.
Using our VIN it seems like several GM parts sites list GM 22741027 that is pretty pricey.

Looking on RA there are many motors that are significantly less expensive, including two GM motors but the (GM's) part numbers don't matchup and it's not a given that the aftermarkets are a correct match.

Curious if anyone has used an aftermarket fan motor.

the catch here is with your 2008 you might want to pull the old one out and check the design
in my photos below the one I am pointing at is the old design on the right with a "airtube" that cools the motor from a corresponding slot in the airbox,
the one on the left is the new design and it is self-cooling
both will fit, but if you replace the old design with the new design you will have a open hole in the airbox and if you have the new design and put a old design on it will not have any cooling.
I am not sure what year they changed the design but it seems to be early on your 2008 could have either design.
both of my examples are OEM made in korea
rockauto shows either design for the same year so best to get under there and check it out before buying

***to remove the blower lift the orange locking tab from the harness connector squeeze the tab and the harness pulls out, then there is one screw to remove then you lift the plastic tab visible on the left blower motor in my photo then twist the whole thing I believe counter clockwise and then it will simply slide out.
AIR.jpgAIR1.JPGAIR2.jpg
 
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EddieC

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Our vin on gm parts sites pulls up this photo related to the part number delivered and noted above and it doesn't appear to have the vent tube.
(It's odd that some GM parts sites link to an Amazon photo.)

RA has one by "Four Seasons" that notes updated design but it's so inexpensive I wonder about it.
RA has many listed but not necessarily linked to our VIN if that matters on proper application: https://www.rockauto.com/en/catalog...040,heat+&+air+conditioning,blower+motor,6916

I'll get in there when the weather breaks and see which type is there and maybe it has a number on it.
 

Doubeleive

Wes
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Our vin on gm parts sites pulls up this photo related to the part number delivered and noted above and it doesn't appear to have the vent tube.
(It's odd that some GM parts sites link to an Amazon photo.)

RA has one by "Four Seasons" that notes updated design but it's so inexpensive I wonder about it.
RA has many listed but not necessarily linked to our VIN if that matters on proper application: https://www.rockauto.com/en/catalog...040,heat+&+air+conditioning,blower+motor,6916

I'll get in there when the weather breaks and see which type is there and maybe it has a number on it.
amazon has (AWS) a big cloud server service tons of gm stuff is on there web servers
 

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