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SUVs Chevrolet TrailBlazer Chevrolet Trailblazer Maintenance and Repair
585 messages, Last post on Oct 14, 2009 at 7:29 AM
You are in the Chevrolet TrailBlazer Forum. Your Hosts are steve_ & tidester
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I have a 2002 EXT trailblazer that has a chronic road vibration that starts at 40 MPH peaks at 60 MPH and exists through 75 MPH. My dealer has looked at my TB 6 times and has no clue. The dealer does recognize that a heavy vibration exists but won't change out parts just because. On my own I replaced the drive shaft, rotors, and tires. Still no change. The vehicle shutters starting at 40 on up. My smooth ride of new is no longer. The problem was a slow gradual problem that is worse each month. I read all the other post and still I get no satisfaction or solid idea. My trailblazer shutters when the tranny is placed in neutral at 65 MPH. I even shut off the motor at 65 and still feel it so Im sure it not motor or tranny related. Towing makes it worse. ANY IDEA'S ! Wacky |
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Replying to: wacky174 (Sep 01, 2005 3:12 am) |
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Replying to: wacky174 (Sep 01, 2005 3:12 am) |
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Replying to: wacky174 (Sep 01, 2005 3:12 am) I have own a ' 03 TBlzer LTZ and it experienced a very similar problem. A vibration in the rear drive train around 55-65 mph, especially in cruise. It was particularly a noticeable when carrying a cargo load or when carrying 4 adults. When in cruise and accelerating up a long hill, it was really a problem. I called the local (large) Chevy dealer who claimed that they never heard of such a thing and were not helpful at all.. I called a small dealership out in the county and the SVC mgr said right off that he knew what the problem was and furthermore, there was a GM service bulliten on it. The fix was a new set of rear coil springs. I called the big deal back and they still claimed that never heard of the bulliten. Anyway it took care of the problem for me. Good luck, PMc |
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Replying to: wacky174 (Sep 01, 2005 3:12 am) |
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Replying to: alcan (Sep 01, 2005 7:01 pm) The bad tire idea is just that, a bad idea. Tires have been replaced with a high end Goodyear Fortura tire. Same exact problem no better. I replaced the drive shaft with a one made of steel, this increased the problem 10 fold. The original was out of round by .030 front to back. Not a HUGE deal. I placed the aluminum back into the vehicle because the vibration made it un-drivable. The spring theory could be it. I'm just theorizing how that could fix it. The ride high makes or has no effect on the vibration at all. The U-joint angle could be set wrong from vehicle assemble I suppose but all of this was a gradual problem that got worse. One thing I notice those is the front end is very loose. The struts rattle over every bump. Sounds like their falling off at times. Maybe a connection their. My dealer is playing dumb and does not want to dig any further. Nothing like spending huge money and not getting the ride that it had when new. Their is nothing like making a payment on a vehicle that is a lemon. I must say those that of all the SUV's I have owned, this TB is the most comfortable of all. Keep the idea's coming in. I appreciate it. Wacky |
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Replying to: wacky174 (Sep 02, 2005 2:38 am) I should have read your post more closely, I apologize for suggesting something you have already done. The other posts seem to be hitting on the possible problem. My EXT runs fine, so I'd appreciate an update if you find the solution in case I have to deal with it in the future. |
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Hi. My 2002 TB LT started something really strange a few days ago. As the days pass, the "symptoms" are becoming more apparent in different areas. Under normal conditions the following things should happen: ***Keyless entry should lock/unlock one/all doors with horn/lights. ***Rear window wiper and fluid should work ***When key is removed from ignition, radio should still play for ten minutes, interior light should come on and windows should still roll up/down. NONE of these are working or ALL of them are working. It's intermittent and hard to figure out the problem. If the door unlocks with the keyless remote, all of the above mentioned will work correctly. However, when i turn the engine off and the radio turns off too, I can't use the keyless to lock the doors and arm the alarm. I called the dealer (out of warranty of course) they said $500 for a computer Switch assembly with labor. Does this sound like a correct diagnosis? Any ideas? What can I check for? is there a site that has a diagram or description of what the modules do or which computer controls what? I'm lost. please help. 
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I have just replaced the transmission for the 3rd time in as many years. Has anyone heard of this before? My husband is urging me to trade it, but I don't really want to. Can anyone give me some hope?
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