Question about 2004 Chevrolet TrailBlazer

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I have a 2004 Chevy Trailblazer and when it gets in high gear it keeps shifting down like it is locking or something. We have had it in shop for 5 weeks and thermostat and coolent sensor have been re

We have determined this is not a Transmission issue. We recently had the resignator taken off the muffler because it was cracked but that and the replacement of thermostat and coolent sensor is all we have tried.

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I am afraid you have mis-diagnosed it NOT being the Transmission or I should say Torque Converter, TCC Solenoid. I would strongly recommend that you replace the TCC Solenoid in the 4L60E Transmission. Then see what happens. If you drive it with the TORQUE CONVERTER Button in the OFF Position on the Shifter, does it fix the problem?

Posted on Feb 13, 2014

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Posted on Jan 02, 2017

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SOURCE: Chevy venture 2004 Transmission

Bring to tranny shop or repair shop, have it scanned for trouble codes, many electrical parts and solonoids in those trannys, possible it may just be a shift solonoid bad or needs adjustment, much cheaper than replacing tranny. good luck!

Posted on Feb 09, 2009

  • 8 Answers

SOURCE: Code Reader reads Shifter Solenoid Stuck or Off

The Shift solenoids are located in the transmission oil pan. I would recommend replacing both shift solenoids while you're in there. Also replace the filter and pan gasket. The shift solenoids are located towards the rear of the valvebody and will be identical to each other. They are held in place by a retaining clip which is easily removed with a small screwdriver or similar tool. Care must be taken as parts may fly out of the bore when the solenoids are removed. Hope this helps.

Posted on Feb 10, 2009

fischmilch
  • 96 Answers

SOURCE: 89' Chevy Silverado Truck- All gears work but REVERSE

Check the linkage at the transmission. Have somebody move the selector while you watch the linkage move. It might be out of adjustment for reverse, or be binding up.

Posted on Aug 21, 2009

  • 2 Answers

SOURCE: 1997 Chevy 1500 P/U 4x4 small V8. Transmission shifting issue.

you may be confusing the torque converter clutch engagement with o.d. this trans has a problem with the T.C.C. regulator valve wearing out the valve body bore. this will cause the converter clutch to engage only sometimes or not at all. this will set a P1870 code in the control module. when this code is stored in the controller, ( check engine light may or may not be on), it increases the pressure in the transmission causing the 1-2 shift to be harsh. ask a local tranny shop to scan the vehicle ( most will do this for free) if this is the problem they can either fix your valve body (sonnax parts) or replace it with an upgraded valve body. hope this helps

Posted on Dec 16, 2009

  • 37 Answers

SOURCE: 2002 chevy trailblazer, replacing the transmission lines

the are located behind the dipstick on the passenger side of the transmission, you must remove the retainer clips and pull straight out the same as to the radiator. You may beed to remove the heat shield on the side of the transmission to ease acces

Posted on Dec 30, 2009

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1 Answer

My 2004 chevy trail blazer keep shouting down!


So what is the question, or it
is already at a repair shop !

Did you check for OBD Codes ?

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Apr 06, 2014 | 2004 Chevrolet TrailBlazer

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I can shift into drive but it won't engage


sounds like a broken shift cable. (the connection between the shifter and the gearbox) common symptoms are the shifter move easier than normal.and does not move to any gears (not even park or neutral).

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1 Answer

2004 Chevy trailblazer won't shift out of first


Have you checked transmission fluid recently. If the levels are low and/or if the dipstick smells burnt, there is a good chance your transmission is shot. Check it out & let me know; may have another idea if the fluid level checks out.

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2004 Chevy Trailblazer Gear Shifter Moves But Will NOT shift into gear ..Came home from shopping put her in park.. Then couple hours later cranked up to go again, shifter moves loosely... The car is in...


The end of the shift cable has broken, there is a plastic ring at the transmission end of the cable that breaks. You will need to have it towed to the mechanic.

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The park shift lock needs adjustment. The solenoid that locks irt inplace maybe the cause of this

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1 Answer

They say the transmission is shot. I am not convinced.


I have a hard time believing the tranny is shot after only 55,000 miles. Get it up on jacks and start it with you under the car and someone else shifting. The linkage could be completely out of adjustment. (The speedo thing is strange though.)

If the linkage appears to be the problem, and is sloppy and loose, there you are. But if not, you may need to rebuild it. But I would get a second opinion from a well known smaller shop where the owner works there and is known for honesty.

May 29, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

2004 chevy trailblazer door lock remotes


The body shop should be able to program the Key F.O.B back to your vehicle. If the battery was disconnected the reciver to the F.O.B lost the frequency.
If the shop can not fix it the dealer can.

Jan 27, 2009 | 2004 Chevrolet TrailBlazer

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