5th Mar 2007, 08:38

I replace the fan clutch on my 03 Envoy XL this past weekend, and the truck has never driven better. All this for $300. For those of you out there with fan clutch problems, purchase the fan clutch, and take it to a local mechanic to install. My mechanic charged me $150 to install. Don't take it to a dealer. They will charge you at least $500.

9th Mar 2007, 09:35

Like many, we have a similar issue with the Clutch Fan. The vehicle is an 2003 Trailblazer. It began two weeks ago, when the weather was in the teens, as a intermittent click. The problem has become more severe - when the vehicle is started, cold or hot, the fan is fully engaged. We're in southern Indiana, I'll post another when I obtain more information on how to remedy this issue under a budget. March 9, 2007.

9th Mar 2007, 21:14

I also have the faulty fan clutch on my fully loaded 2003 4wd Trailblazer LT, the good news is that you can DIY the new fan clutch, fairly easily (a.k.a. an 8hr job if you include 1-5hrs stress/cursing/liquor breaks, several cracked knuckles, and a fair to even mechanical aptitude/lack of commonsense, but possession of Chilton Manual). Fairly easily means you have to have above average competency when dealing with automotive repairs/parts replacement, know when to look for an instruction manual or when to call your dealership and use your AAA tow to get the job done. Now the bad news

1. the wrench part # 46406 is the GM certified fan clutch remover/installer, that can be substituted by a universal kit (can be rented at auto-zone)

2. the PCM (power-train control module) may need to be reprogrammed after installation (This I can't verify because I have not yet replaced my fan clutch on the trailblazer yet, but could someone please email me and let me know if it had to be reset, if it does then I'll replace the part in the Chevrolet dealership parking lot so I can get their useless ("good-wrench" more like good-wench) mechanics to reset it once I finish the repairs, anyone else need to replace a fan clutch on a 2002-2003 trailblazer/envoy in Nashville, TN? Email me we can try and arrange to replace them all in the parking lot on the same day so we can watch them push our truck's into the shop. Nfiltrated@hotmail.com).

12th Mar 2007, 17:54

I also have a 2002 TB that I bought used and am financing and it started making the jet engine noise a few months back, then went away for about a month and what do you know- it's back and louder than ever. I have already replaced the trans and neither one of my rear windows are functioning unless of course you peel the packing tape off that is holding one up. Talk about embarrassing, and I refuse to pay hundreds of dollars for Chevy to fix them. Anyone else have the window motor issue?? I can't wait to get it off of my hands!!!

15th Mar 2007, 06:40

Add me to the list, a couple of days ago my 2003 Trailblazer with 93,000 KM on it started sounding like a 737 on take-off. No engine light at this time, but I am expecting it. Took it in to the dealer last night and based on my description they too feel that it is the Fan Clutch.

Boy was I surprised to see the number of complaints on this forum about it. I am going to call the dealer today, and mention that this seems to be a common problem, and see if I can at least get the 50% deal from them. $800 Cdn. is a bit much for my blood.

16th Mar 2007, 22:52

I just want to add my 2002 TB to the group. It now has 95K miles, but the jet-engine sound began at about 45,000. The local GM service manager couldn't guarantee a new clutch fan would correct the problem. He said "it's the nature of the Beast"!!! I have also been plagued by wiring/electrical problems. The 4-wheel drive goes nuts in the rain--changing all by itself.

I have had numerous recalls repaired and I am still hoping GM will issue one for the fan clutch.

Even with all these problems, I have enjoyed the TB, but I will think long and hard before purchasing another GM product.

23rd Mar 2007, 11:29

I too need to be added to the list. My 2002 TB LTZ just had the jet engine kick on at 85,000 miles. I called the dealership after reading these comments and he told me that he could do nothing as far as warranty until GM was forced to make a recall, which they have stated they absolutely will not do. As soon as I can, this will be traded in for a Toyota.

2nd Apr 2007, 14:26

Yup, got me one of those noisy fan clutches. Unfortunate, as the interior room of the 2002 TB is very nice to haul my audio gear around. My Dodge dually has over 165K miles on it. And looking at the estimates, I don’t think I’ve spent that much total on the Dodge. Well, outside of general maintenance.

First GM, and the last.

5th Apr 2007, 11:29

Just had my 2002 "747" Trailblazer LTZ fixed, 58,000 miles. The ol' clutch fan. Didn't bother with GM, just paid the $420.00 to a shop. Vehicle has a little more pep in her step and that noise is gone! However, there is a loud ticking noise at an idle. This is the one that's driving me crazy. Of course the dealer doesn't hear it! Imagine that! The mechanic that fixed the clutch fan did hear it and said that he hears it in a lot of Trailblazers. Does anyone have any input on this subject? I'd love to hear about it!!!

17th Apr 2007, 17:56

OK…add another to the long list of problems with the fan clutch on the 2002 trailblazer LTZ. Our (roar) problem started several years ago at ~30K miles and was only noticeable occasionally, but now the fan clutch won’t engage at all (no roar, but also no A/C when it is hot). So be warned that when the roar goes away, you are likely to face other problems with the A/C. Today, we have to drive at highway speed before the A/C will start to cool. Count us amongst the many that will never buy another GM vehicle. Can someone give the phone number or E-mail address of the GM rep that can help deal with this problem?

23rd Apr 2007, 11:28

I contacted GM to ask about this fan-clutch problem. The rep refused to even acknowledge that a problem even existed. No TSB's have been issued for our TB LTZ so it must not be a problem. Also, GM does not recognize web sites where customers can actually share the details of problems seen on specific vehicles. Count us amongst the many that will never buy another GM product (Can you say Honda).