Greetings,

I replaced the ignition switch control module about 2 months ago which solved the problem at that time. The resistor was replaced about 2 years ago when I had problems back then. In both cases this solved the problem de jour.

Now, I have no air blowing on any setting 1-5. I do hear a click sound coming from below the passenger glove compartment area when I switch from setting 4 to 5.

Checked all fuses, all okay.

Any thoughts?

Sounds lke the blower motor or the electrical connector to it. The relay you hear clicking is the blower hi-speed relay for position 5 which is also located on the blower motor resistor assembly. You can remove the blower and bench test it by applying 12v to the input pins.

If blower motor checks out then you have another bad BMR as long as there are no other symptoms or electrical faults. Also, check the blower HVAC fuse.

Appreciate the quick reply. I was thinking it might be the blower motor.

I'm going to pull the sucker out and test as per your suggestion. I hope it's only the resistor (cheaper), but what can you do when these things happen. Seems like there are quite a few issues with these heating/air systems on Pontiacs?

I did check the fuses, and they all seemed fine. The only I didn't bother looking at was one that also controlled some other things. Since these other things still work, I figure that fuse it fine?

Many thanks.

Appreciate the quick reply. I was thinking it might be the blower motor.

I'm going to pull the sucker out and test as per your suggestion. I hope it's only the resistor (cheaper), but what can you do when these things happen. Seems like there are quite a few issues with these heating/air systems on Pontiacs?

I did check the fuses, and they all seemed fine. The only I didn't bother looking at was one that also controlled some other things. Since these other things still work, I figure that fuse it fine?

Many thanks.

Sounds good. I double checked the GP service manual and if the blower hi-speed relay is clicking then the HVAC blower fuse is good.

The '97 - '03 Grand Prix suffers more failures in this area compared to other GM "W" body cars. Mainly because they were delivered without a cabin air filter from the factory. As a result water and debris gets into the HVAC system intake. Check to see if you have one and if not it would be a good idea to put one in. Good luck!

Sounds good. I double checked the GP service manual and if the blower hi-speed relay is clicking then the HVAC blower fuse is good.

The '97 - '03 Grand Prix suffers more failures in this area compared to other GM "W" body cars. Mainly because they were delivered without a cabin air filter from the factory. As a result water and debris gets into the HVAC system intake. Check to see if you have one and if not it would be a good idea to put one in. Good luck!

I've noticed on two occassions that the floor on the passenger side gets wet. Couldn't figure that one out. I'll check it out though. Any chance there are photos of this part/area on the car on the forum anywhere?

Also, not being a mechanic but mechanically inclined :-), is the blower motor difficuly to replace? I know when the fellow replaced the resistor he had a fun time replacing that. I've got a photo of the blower motor and know what I'm looking for there.

Many thanks.

I've noticed on two occassions that the floor on the passenger side gets wet. Couldn't figure that one out. I'll check it out though. Any chance there are photos of this part/area on the car on the forum anywhere?

Also, not being a mechanic but mechanically inclined :-), is the blower motor difficuly to replace? I know when the fellow replaced the resistor he had a fun time replacing that. I've got a photo of the blower motor and know what I'm looking for there.

Many thanks.

You're welcome. Here is a link that shows the passenger side cowling area and how to install a cabin air filter. They cost around $11 - $40 depending on what auto parts store you decide on. Brands are Purolator, AC Delco, Fram, etc. One from a '97 - '04 Buick Regal fits perfectly.

The blower motor is help up to the lower HVAC assembly by three bolts (5.5mm) and not difficult to replace. As you already know it is a tight working area.

http://www.mccgp.com/upgrades/cabinairfilter/air_filter.php

You're welcome. Here is a link that shows the passenger side cowling area and how to install a cabin air filter. They cost around $11 - $40 depending on what auto parts store you decide on. Brands are Purolator, AC Delco, Fram, etc. One from a '97 - '04 Buick Regal fits perfectly.

The blower motor is help up to the lower HVAC assembly by three bolts (5.5mm) and not difficult to replace. As you already know it is a tight working area.

http://www.mccgp.com/upgrades/cabinairfilter/air_filter.php

Excellent. I really appreciate your help. As soon as the wife comes home with the car I'm gonna check out the blower motor and then I'll have a look for the cabin air filter and see what's up with that area. Given that I've only had water come in twice in the three years I've had the car, I'd say something is beginning to go bad in that area and looking after it now, may save some real grief later.

Cheers.

I'm curious about the cabin air filter and how it will stop rain from coming in. As I haven't looked at mine but have recently had this same problem with water coming into the passenger side I have been following these blower motor and leak posts.
I also have some a/c woes but haven't thought much about them until recently when I started hanging out here more often. My control doesn't seem to work correctly as I can go from the dash vent to defrost and it doesn't seem to blow any air. I can hear a roaring noise when I turn the fan higher and it gets louder but doesn't seem to blow any more air.

I'm curious about the cabin air filter and how it will stop rain from coming in. As I haven't looked at mine but have recently had this same problem with water coming into the passenger side I have been following these blower motor and leak posts.
I also have some a/c woes but haven't thought much about them until recently when I started hanging out here more often. My control doesn't seem to work correctly as I can go from the dash vent to defrost and it doesn't seem to blow any air. I can hear a roaring noise when I turn the fan higher and it gets louder but doesn't seem to blow any more air.

Are the other HVAC settings working?

Are the other HVAC settings working?
Yeah my air works but when I turn the fan up I don't get much more air out but it sounds like it is blowing a monsoon.

Yeah my air works but when I turn the fan up I don't get much more air out but it sounds like it is blowing a monsoon.

Have you checked the accessory vacuum line from the intake manifold. It goes by the battery and engine compartment fuse box. Easy to come apart. All the HVAC actuators especially for defrost use that vacuum source. It then routes into the firewall to a block by the blower motor and feeds off to various actuators and controls.

Have you checked the accessory vacuum line from the intake manifold. It goes by the battery and engine compartment fuse box. Easy to come apart. All the HVAC actuators especially for defrost use that vacuum source. It then routes into the firewall to a block by the blower motor and feeds off to various actuators and controls.
I have not checked that but I will investigate it, thanks.

I have not checked that but I will investigate it, thanks.

Sounds good.

BTW - On the cabin air filter checkout the link below and you'll see why it is better to have a cabin air filter then not. The HVAC intake is wide open in the Vent and AC normal positions so the cowling sealing is critical. In Max AC and other positions a flapper closes sealing it off because air is drawn in from the inside of the car. The filter is just an extra precaution and may not preclude keeping out rainwater totally.

http://www.mccgp.com/upgrades/cabinairfilter/air_filter.php

Sounds lke the blower motor or the electrical connector to it. The relay you hear clicking is the blower hi-speed relay for position 5 which is also located on the blower motor resistor assembly. You can remove the blower and bench test it by applying 12v to the input pins.

If blower motor checks out then you have another bad BMR as long as there are no other symptoms or electrical faults. Also, check the blower HVAC fuse.

I confirmed that the blower motor is the problem. Will pick one up on Thursday and install it. I like all the room one has to work in down there, not......

Thanks again.

I confirmed that the blower motor is the problem. Will pick one up on Thursday and install it. I like all the room one has to work in down there, not......

Thanks again.

Good job! Let us know how it turns out. Good luck!

Make sure you specify whether you have climate control or manual A/C, as the blower motors are different. AC-Delco numbers for reference are as follows:
97-99, 00 1st design w/manual a/c; 15-8949 (gm#52489321)
97-99, 00 1st design w/auto a/c ; 15-8950 (gm#52489322)
00 2nd design -03 w/manual a/c ; 15-8880 (gm#52487083)
00 2nd design -03 w/ auto a/c ; 15-8940 (gm#52487088)
if your car is a 00, the oem sticker will determine which one you need, as there is no vin# cut-off.

Thanks for the great tip on a cabin air filter. Why these cars would not be equipped with it from the factory is beyond me. As I work in the HVAC business, i know that filtration of incoming air is so very important, and appreciate the link. Installing a cabin filter is a brilliant idea.

Thanks for the great tip on a cabin air filter. Why these cars would not be equipped with it from the factory is beyond me. As I work in the HVAC business, i know that filtration of incoming air is so very important, and appreciate the link. Installing a cabin filter is a brilliant idea.

Good point. Yeah, that has been a big mystery for us GP owners. If there is one that is only because the owner installed one. I have to change mine out every 6 months or so because of the dust storms we get. Cleaning more frequently. I installed mine back in 1998 after I noticed excessive dust in the vents.

I use the same ones for my Regals. BTW - I still have my original blower motor 8 years later as a result.

Good point. Yeah, that has been a big mystery for us GP owners. If there is one that is only because the owner installed one. I have to change mine out every 6 months or so because of the dust storms we get. Cleaning more frequently. I installed mine back in 1998 after I noticed excessive dust in the vents.

I use the same ones for my Regals. BTW - I still have my original blower motor 8 years later as a result.

I don't have one on mine and I still have the original 9 years later. Maybe I need to put one in.

I don't have one on mine and I still have the original 9 years later. Maybe I need to put one in.

lol. I'm surprised you haven't put in a least three with your mileage. :lol:

It wouldn't hurt. I do it out of necessity. Freaks the parts guy out at Autozone or Checker. I get three at a hit. 3 GM "W" bodies to maintain.

But I found a generic direct fit cabin air filter at Checker/Kragen/Schucks. $11.00 plus tax.

lol. I'm surprised you haven't put in a least three with your mileage. :lol:

It wouldn't hurt. I do it out of necessity. Freaks the parts guy out at Autozone or Checker. I get three at a hit. 3 GM "W" bodies to maintain.

But I found a generic direct fit cabin air filter at Checker/Kragen/Schucks. $11.00 plus tax.

I'll check mine out next week after the race this weekend at Atlanta. Don't want to get involved in anything that interferes with race weekend.

I'll check mine out next week after the race this weekend at Atlanta. Don't want to get involved in anything that interferes with race weekend.

Atlanta? I used to live and work in Marietta (Cobb County). Both of my boys were born there. Lots of things to do in the Atlanta and surrounding areas. Nice place to live.

Have fun!

I'm putting one in mine when I get around to changing the squeaking blower motor. It's too cold right now, and it only squeaks at middle speeds, on high and low it's fine so it can wait.

I'm putting one in mine when I get around to changing the squeaking blower motor. It's too cold right now, and it only squeaks at middle speeds, on high and low it's fine so it can wait.
Now that you mention it, I remember my fan squeaks a little on low. I haven't driven my car that much in the last threee weeks.
I live about 30 miles south of the Atlanta track. It's much too crowded around the city and especially the north around Cobb and Gwinnett counties.

Sounds lke the blower motor or the electrical connector to it. The relay you hear clicking is the blower hi-speed relay for position 5 which is also located on the blower motor resistor assembly. You can remove the blower and bench test it by applying 12v to the input pins.

If blower motor checks out then you have another bad BMR as long as there are no other symptoms or electrical faults. Also, check the blower HVAC fuse.
Hello Bnaylor3400,

Sorry for the delay in replying. Got a little side tracked with work and all. Anyway, I changed the HVAC blower motor and all is well again. Not a lot of room to work down there, but I sure am glad I'm left handed :-) One thing left to do, get that cabin air filter. When I had the blower motor out I had a look up and can see how that filter can be rather important in stopping water coming in.

Thanks again for you help.

Cheers from Toronto.

Hello Bnaylor3400,

Sorry for the delay in replying. Got a little side tracked with work and all. Anyway, I changed the HVAC blower motor and all is well again. Not a lot of room to work down there, but I sure am glad I'm left handed :-) One thing left to do, get that cabin air filter. When I had the blower motor out I had a look up and can see how that filter can be rather important in stopping water coming in.

Thanks again for you help.

Cheers from Toronto.

Not a problem and you are welcome. We're here to help. Sounds like you have it all under control. Good job!

with all this knowledge, i just had to join . I'm having problems with my drivers side air. It only heats (even with A/C on). Sound familiar?:banghead:

with all this knowledge, i just had to join . I'm having problems with my drivers side air. It only heats (even with A/C on). Sound familiar?:banghead:

What year and model Grand Prix? Do you have a manual or digital climate control system?

Sorry, I Guess It Makes A Difference. I Have A 99 W/digital Controls.

Sorry, I Guess It Makes A Difference. I Have A 99 W/digital Controls.

The dual digital climate control uses a temperature actuator (total of two)which is motor driven based on where the respective driver's or passenger's temperature is set. The driver's and passenger's side are independent of each other. The one you may be having problems with is located on the left hand side of the HVAC assembly or center of the dash. Thats one possibility. The other is your AC system is low on refrigerant charge. When charge is low the passenger side will work OK but the driver's side will feel warm or not cool.

Last possibility is a defective climate control head unit. The digital system has a diagnostics mode or test you can run but it may not be too helpful.

Thank You For The Info. I Will Check These Things Out And See Where It Leads. Have A Good Weekend.

Thank You For The Info. I Will Check These Things Out And See Where It Leads. Have A Good Weekend.

Good luck and let us know how it turns out or if you need further assistance.