Question about 2003 Hummer H2

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Key shifter lock

My electrical was completely out. No door locks, windows, radio, or gauges. Both key and shifter were locked up. I replaced the wiring harness attached to the shifter on the side of the shifter console. This fixed all my electrical issues but my key will not release nor will it shift in to gear. I have to manually push release button for the key as well as the actuator to engage the shifter. I took it for a test ride and also noticed it felt as though the e-brake was engaged yet it wasn't. Is there a "clear code" I need to use? By replacing the whole shifter assembly will that cure my problems? Thanks

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Yes, the shifter assemly has to be replaced. they are pricey but it does fix the problem. Also is very common in the newer Dodge magnums.

Posted on Jan 01, 2014


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has to be re-programmed by dealer next time send power into cigerete lighter with nine volt battery before changing battery and all memory will be saved auto parts sell this tool for 5 dollars. one end is for nine volt battery the other a power port jack.

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Replace the PCM fuse located under the hood in the fuse box. Sounds crazy but mine wasn't blown, took it to the dealer and they replaced my "good" fuse with a new one and everything worked again.

Posted on Dec 08, 2010

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I hope this helps....these are the steps to removing and replacing the cylinder:

  1. Remove the knee bolster.
  2. Remove the steering column trim covers from the steering column.
  3. Disconnect the steering column electrical connectors.
  4. Remove the wire harness assembly from the steering column and the wire harness strap.
  5. Slide the 2 connectors of the turn signal and multifunction switch assembly out of the bulkhead connector.
  6. Remove the key alarm connector from the lock module assembly in the following way:
  7. Rotate the key alarm connector 90 degrees.
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  9. Remove the passkey connector from the lock module assembly.
  10. Remove the connector from the electric park lock, for vehicles equipped with floor shifters.
  11. Remove the ignition switch from the lock module using tool J42759 or equivalent.
To install:
  1. Install the ignition switch to the lock module
  2. Install the key alarm connector into the lock module assembly.
  3. Push the key alarm connector into the lock module assembly.
  4. Rotate the key alarm connector 90 degrees so that the key alarm connector locks into place.
  5. Install the passkey connector into the lock module assembly.
  6. Install the connector to the electric park lock, for vehicles equipped with floor shifters.
  7. Slide the 2 connectors of the turn signal and multifunction switch into the bulkhead connector.
  8. Attach the wire harness assembly to the steering column wire harness strap.
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  10. Install the trim covers to the column.
  11. Install the knee bolster.
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