Question about 2002 Chevrolet TrailBlazer

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Won't shift out of park

My blazer starts fine but sometimes when i go to shift it doesn't shift so i have to use the override button. Can someone tell me what it could be i have removed the center console and did a thorough check for frays and solenoid and such, and needless to say didn't find anything. Any suggestions would be awsome.

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  • Anonymous Nov 18, 2008

    I currently have the same problem with my 2004 Trailblazer. This is the third time this has happen.

  • mselkregg Mar 26, 2009

    Check engine light comes on and reduce power light. Truck idles high andthen like chokes out. Cannot get out of park. Happened after I installed a brake controller & new battery. Brake Controller was installed properly and still did not work. Uninstalled and now will not get out of Park.

  • debakridge May 07, 2009

    I have a 2004 Envoy. Last May, my button on the gear shift would not allow me to push it in to move gear out of park. Only happened on extremely hot days - plenty in TX. Dealer checked all brake lines and gear shift panel - could not reproduce problem, so no real solution. This last weekend, it happened again. Dealer checked all but still could not reproduce. Suggested replacing shift lock solenoid, but could not guarantee that it would fix problem. Only happens when hot outside. Have to wait till evening when cool again, then car shifts fine.

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Check the wire hooked to the brake light switch on the brake pedel on my trailblazer that wire broke not allowing power to the shift lock solenoid

Posted on Feb 22, 2009

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1 Answer

Shifter interlock


what car, you never said? NOR YEAR?
park lock out feature;. its broken , they do that. (BTSI system)
got A/T? or M/T both auto and stick shift have lockout.

no car/year, you get the generic answer.
there is a park lockout DEFEATER on most cars, (never on new cars,due to federal bs)

on the shift console, see the defeat device.
the operators guide covers this. its for EMERGENCIES.
pick one.
http://justgivemethedamnmanual.com/jeep/

the A/T box,
Brakes + handle button press, unlocks BTSI

on 2005 and up , no bypass
if the key gets locked too, that tells you what is bad , on newer jeeps
on newer jeeps read this
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?p=366251

this feature (pain) has many failure points.
any cable that jams, there are 2 , one to tranny or ignition
switch. and the brake solenoid unlocker in shift handle.
and the button, to unluck shifter, brake switch (no brake lights/)
to diagnosis it is easy , dismantle the console at shifter
then disconnect cables to find if one is stuck, (easy huh?)
and defeat the solenoid, by hand or 12v applied. and check the button
that it does in fact release.
NOT PARK LOCKOUT: (for if not on flat ground?)
reason 2 , driver, parked on a hill with tire to curb and did so
not setting brakes first (or bad ebrake ) and now the tranny parking
pawl is jammed , opps. so wiggle the steering and wiggle shifter,
or have some one push car forward (parked up hill on right) to release
parking pawl. (or gorilla it, ask bubba to muscle it out of park.)
if down hill , well, you get the idea..... pain.. gotta love A/Ts not.
Folks in Sanfranciso, just roll eyes at you, new in town>?

now the grand cherroke,, why not post car model, and year, dang.

quote 2010 oper guide, get one.
Brake/Transmission Interlock Manual Override Your vehicle may be equipped with a shift lock manual override. The manual override may be used in the event that the shift lever should fail to move from PARK with the ignition switch in the ON position and the brake pedal pressed. To operate the shift lock manual override, perform the following steps: 1. Turn the ignition switch to the ON position without starting the engine. 2. Firmly set the parking brake. 3. Using a flat-bladed screwdriver, carefully remove the shift lock manual override cover, which is located on the PRNDL bezel. 4. Press and maintain firm pressure on the brake pedal. 5. Using the screwdriver, reach into the manual override opening. Press and hold the shift lock lever down. Interlock Manual Override end quote.
no all jeeps have this,

Feb 06, 2014 | Jeep Cars & Trucks

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It could possibly be a bad electrical connection or poor connection with the transmission. Did the mechanic get any error codes?

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Could be the brake switch or the shift lock solenoid. You may be able to turn the key lock to the unlock position, move the shifter out of park, then start the engine in neutral.
The shifter and the shift lock solenoid would need to be inspected.

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My 1996 blazer won't go into park sometimes, could


It could be the shift cable, and it could also be the shift lock solenoid.

Jun 18, 2013 | Cars & Trucks

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Looking for Brake-shift interlock override


Unable to shift out of park on very hot days in my Mazda6 2003, was becoming a serious problem this summer.....there is no override button/key on this model. I had it to the Mazda dealership five times before the problem was corrected! Initially the wrong diagnosis was made and replacement of something connected to the brake did not correct the problem. Finally, the shifter was replace and the problem was solved. $$$ Seems like there have been many different electrical problems with this model....some under warranty, some not. I will not ever buy another Madza.......there is no excuse to design a car without an override button or key! ( It was scary to be stuck on sweltering hot days not being able to get out of park.....had I ever had my grand babies with me when this happened, I would have been desperate.)

Jul 27, 2012 | 2003 Mazda Mazda6

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I own a 2004 Hyundai Accent. I'm not able to shift out of park. I've tried the shift over ride and that worked once, now it doesn't H E L P !


Have someone look at the Brake lights when you press the Brake pedal. Your car needs the Brake switch to unlock the Shifter. If you do not have working Brake lights, then that is the problem.
There is a safety Lock-out which requires the Brakes to be on when you try to move the gearshift out of Park. Sometimes the switch gets bumped or broken by your feet getting in or out of the car. I work on Ford family Brands and this is how the shifter releases on them.

You can call an autoparts store and ask about this safety switch. On your car, they may have a cycling phase switch which may be the reason the temporary fix was temporary. Until the switch is recycled, it may not work.

About the only thing I can think of to give you 1 more start is to remove the NEG battery terminal a few minutes and then reconnect it. Then try to start it and override the system like you did once.

Jan 15, 2012 | Hyundai Motor 2004 Accent

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Dome light won't work exept by the override switch-sometimes


I seem to be having the exact opposite problem. I have a 99 chevy blazer and the dome light will not turn off unless I push the override button in. The radio does turn off as soon as I turn off the ignition key. If I leave the dome override button out, the dome light will constantly stay on even while I am driving. It used to work fine. Every now and them it starts working properly, but it hasn't worked right for a long time now. I tested all the switches and they all seem ok. They rear hatch is also closed. Does anyone know what the problem can be and how to fix it?

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I can not get the Auto shift lever out of park


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