Vibration 40-65 mph Trailblazer 03, Not the SPRINGS! already replaced
I was just wondering if 2003 Trailblazer ownwers with the straight 6 have had the same problem I have encountered, because my dealer has not figured out what is wrong yet! Vibration 1500-2200 rpms 40ish-65ish mph, THMMMMMMMMMMMMMMM THMMMMMMMMMMMMMM THMMMMMMMMMMMMM!
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It can give the same symptoms as a shudder at those speeds you speak of.
It was only released a few weeks ago, so they may not know of it.
Transmission Slipping or Torque Converter Clutch (TCC) Inoperative with No SES Light Displayed and No DTC P1870 (Reprogram PCM and Diagnose Vehicle Using P1870 Diagnostic Table) #03-07-30-001 - (01/17/2003)
Many GM vehicles, and some DaimlerChrysler vehicles, have shown this trait. Just because there is a TSB out on it, though, doesn't give the manufacturer a "get out of jail free" card - your vehicle may still have the problem, while others don't, making yours worth less to potential appraisers.
Because I have very little patience, and some mechanical aptitude, I removed the rear driveshaft, and took it to the local d'shaft shop for a balance check. They called me a couple of hours later, and said it was too badly warped to just balance out the vibration.
When I went back to pick up the shaft, the shop foreman pointed to the sticker on the shaft, and said there's your problem. The sticker said "Made at Three Rivers Plant". He told me that they were getting in quite a few shafts from there that just weren't assembled "square". They made a new shaft for me, I installed it, and the truck was smooth as silk.
Took the original shaft back to the dealer, and after a few minutes of "discussion" and a ride around the block, they agreed that the shaft was indeed the problem and had GM reimburse me for the repair. They said that if they ordered another shaft through GM parts network, it would also be made at the three rivers plant, so it could be bad also. Just somthing for you guys to ponder....
I don't want to sound like I complain, This is a great truck!!!! I would recommend one to anyone!!!
Debris gets kicked up by the front tires and the air flowing around the car, in a circular motion, brings some of it into the vehicle's body.
Save the calls to the Pentagon and focus your energy on something much more important. This is certainly NOT a Trailblazer problem.