Hummer H2 For those who like a little more gleam to their Hummer, the H2 offers a similar rugged look as the H1, but as a lower cost, and with more added features, making it almost a massive luxury SUV.

Transmission Shift Problem

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Old Apr 7, 2026 | 04:55 PM
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jsIII's Avatar
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From: Natchez, MS
Default Transmission Shift Problem

I have a 2006 H2. Today I stopped at a drive thru window and put shifter into Park position. However, the indicator on dash showed transmission still in D (Drive). I tried to move the shifter back into drive position but the shifter button would not press in nor would the shifter move to the drive position. Vehicle was still in drive so I was able to drive it home. Got home and tried to move shifter, it will not move and button will not press in. Vehicle will not start because it is locked in drive position. Can someone tell me what's wrong?? Thanks.
 
Old Apr 7, 2026 | 05:03 PM
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Originally Posted by jsIII
I have a 2006 H2. Today I stopped at a drive thru window and put shifter into Park position. However, the indicator on dash showed transmission still in D (Drive). I tried to move the shifter back into drive position but the shifter button would not press in nor would the shifter move to the drive position. Vehicle was still in drive so I was able to drive it home. Got home and tried to move shifter, it will not move and button will not press in. Vehicle will not start because it is locked in drive position. Can someone tell me what's wrong?? Thanks.




Common Repair Methods:
  • Bushing Replacement: The most common issue is a broken bushing at the transmission end of the shifter cable. A new bushing can be pressed in, sometimes with a tool included in kits (e.g., from eBay).
  • Shifter Cable Replacement: If the cable itself is worn, replacing the entire assembly might be necessary, which involves removing the center console, taking 1-6 hours.
  • Repair Pin Kit: A more robust, permanent fix, such as the ATF Speed repair pin replaces the plastic bushing with a metal pin to prevent future failu
 
Old Apr 7, 2026 | 05:20 PM
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jsIII's Avatar
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Would a broken bushing keep the shifter button from pressing in?
 
Old Apr 7, 2026 | 06:25 PM
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Originally Posted by jsIII
Today I stopped at a drive thru window and put shifter into Park position. However, the indicator on dash showed transmission still in D (Drive).
Would a broken bushing keep the shifter button from pressing in?
Did you get under and check the PRNDL lever?
 
Old Apr 8, 2026 | 02:52 PM
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MOVED to the H2 section where all H2 tech questions belong.
 
Old Apr 9, 2026 | 04:35 AM
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I'm thinking a couple possibilities considering how the shifter works. You have a shift interlock solenoid in the center console.... With the key on, and pressing the brake pedal you should hear it click. That's solenoid is controlled by two things. One is the brake light switch at the top of the brake pedal. The other item is the neutral safety switch which isn't really a good name for it but what it's listed as in most parts catalogs.... If you look on the driver side of the transmission where the shift cable moves the lever, it's a large plastic item secured with two bolts that goes over the shifter shaft. It performs many functions, including telling the ECM when it's safe to start the vehicle by indicating park or neutral status.

Most likely it's going to be the brake light switch at the top of the pedal or the solenoid on the side of the shifter itself. (Check the wires in the harness under the center console, that go to that solenoid. It's not uncommon for one of them to break)
 
Old Apr 9, 2026 | 08:06 PM
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Mark R's Avatar
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From: Egg Harbor Township NJ
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Originally Posted by RobertDez
I'm thinking a couple possibilities considering how the shifter works. You have a shift interlock solenoid in the center console.... With the key on, and pressing the brake pedal you should hear it click. That's solenoid is controlled by two things. One is the brake light switch at the top of the brake pedal. The other item is the neutral safety switch which isn't really a good name for it but what it's listed as in most parts catalogs.... If you look on the driver side of the transmission where the shift cable moves the lever, it's a large plastic item secured with two bolts that goes over the shifter shaft. It performs many functions, including telling the ECM when it's safe to start the vehicle by indicating park or neutral status.

Most likely it's going to be the brake light switch at the top of the pedal or the solenoid on the side of the shifter itself. (Check the wires in the harness under the center console, that go to that solenoid. It's not uncommon for one of them to break)
As stated above .. if the shifter button will not move it should the solenoid. The shifter panel which can be removed by taking the shifter handle off and removing the center console glove box assembly (At least on my 2009 H2 Lux). If you look under the shift meck you should see a silver colored button which when pressed in will release the shifter.

There was an upgrade on the wiring and connector to the the solenoid which uses a heavy teflon wiring assembly. The old wiring assembly moves back and forth with the shift linkage under the console. It breaks.... Which kills the Ground power the the solenoid keeping the shift button on the shift lever from moving in after you press the brake pedal.

I turned that into an "Anti Hijack System" . Using a hidden push button floor mounted. When pressed it breaks the ground connection using a relay under the shift meck to kill the solenoid. It ain't going anywhere stuck in park.
 
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