A/C Grinding Noise at Startup

[tahoeguy83]

I've had my '08 Tahoe a little over a year now and continue to have this problem. The service department at my local Chevy House at first gave me a print out of the problem, but told me there was no fix for it. The noise was a normal operating sound. But after a year of dealing with this LOUD grinding sound, which happens off and on, it isn't a constant, and having people give me looks in parking lots, I'd gotten tired of this issue. So I've taken it for routine maintenance, and every time I ask about this issue, now they claim to not know anything about it, and they can't make my vehicle make this sound.

The sound usually happens after the vehicle has sat overnight or for an extended amount of time, two or three hours. It isn't the engine, as it only happens right after the air kicks on a few seconds after the car is started. It grinds for 2-5 seconds and then it stops.

The print off they gave me the first time, said this issue could happen to any 2007 or 2008 Tahoe/Yukon/Escalade, and it was a block of ice getting sucked through a tube, and the grinding was the ice breaking apart....I dunno! Thats what they said.

Just curious if anyone else had this problem and if they'd gotten it fixed. I love my Z71 but I am getting really sick of this sound which happens almost daily now.

Thanks!

 

[sarahw]

Look here... http://www.chevroletforum.com/m_67906/tm.htm

It's probably the same thing, and the fix for this is bulletin 07-01-38-010, reprogramming of the ECM. Good luck.

 

[tahoeguy83]

Thank You!

 

[sarahw]

No problem! I was thrilled to see that post when my 'Hoe started making that noise. Be sure to check the vid... http://smg.photobucket.com/albums/v619/slakgolf/?action=view&current=05-27-08_1118.flv

Does that sound like yours??

 

[tahoeguy83]

LOL, oh that's it alright! Mine will do it longer sometimes, and in a crowded parking lot, it's VERY embarrassing!

So you've had this problem and they updated it and now you no longer have the problem?

 

[sarahw]

Yes. I actually emailed that url to my Chevy service advisor and told him I wanted that ECM update. That was 2 months ago and I haven't had it happen since.

 

[tahoeguy83]

Fan-freakin-tastic!

I'm printing all of this out and getting up at the crack of dawn to have them fix this!

I can't thank you enough!

 

[sarahw]

I'm just passing on some info that helped ME, too! These forums are great. Good luck, I hope this is the fix for your problem.

 

[tahoeguy83]

So I took my vehicle in, told them the problem, gave them the bulletin number, told them to reprogram the ECM, etc. When I went to pick it up, the service report said that they weren't able to duplicate the noise (which duh, it doesn't happen everyday), so they didn't find a need to correct a problem which was non-existent.

I am really pissed with my service department, I thought this was a really a simple reprogramming issue which shouldn't have taken very long to complete. Rather than have me leave my vehicle overnight for them to just ignore me.

I can't wait to get my survey from corporate and I'm going to let them have it. I am so sick of the way I'm treated at this department.

 

[AZSCTACO]

So I took my vehicle in, told them the problem, gave them the bulletin number, told them to reprogram the ECM, etc. When I went to pick it up, the service report said that they weren't able to duplicate the noise (which duh, it doesn't happen everyday), so they didn't find a need to correct a problem which was non-existent.

I am really pissed with my service department, I thought this was a really a simple reprogramming issue which shouldn't have taken very long to complete. Rather than have me leave my vehicle overnight for them to just ignore me.

I can't wait to get my survey from corporate and I'm going to let them have it. I am so sick of the way I'm treated at this department.

Thats what they did to me BEFORE the bulletin came out. I showed him the video above (which is my truck) and he considered that good enough and they did it. Give them 0's when you get that CSI report from GM.

 

[Gambler]

Yikes, I watched your video TACO, it caused me physical pain to hear that noise... Glad there is a fix for it!

 

[sarahw]

Taco--your original thread and video has helped so many people out.


TahoeGuy--I can't believe the dealership did that, considering that there is a SERVICE BULLETIN for the damn problem. Can you take the truck to a different dealership? What a bummer.

 

[Bardo]

New to the forum and new to the Tahoe. I recently purchased a 07 Tahoe LT and it did this to me last night. It actually shut the engine down. Thanks for the info, guys.