Ignition switch replacement instructions please

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You probably broke it when you forced it out of park.

That would be called the shift interlock feature. It operates on the same circuit as the brake lights so the first thing you want to do is to make sure the brake lights are working when this problem is present. If the brake lights are working, that proves the circuit is good up to that point, then you'll have to get to the solenoid in the console. Disassemble as much as you have to to access the solenoid near the shifting mechanism. Us a 12v test light to test for power coming and going at the solenoid when the brake is applied. If power is arriving and switching and the solenoid is not triggering, the solenoid is bad and will have to be replaced.
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Monday, February 8th, 2021 AT 12:24 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,772 POSTS
Don't laugh, but are the brake lights coming on? The brake light switch powers the park lock solenoid. If the switch doesn't send power to the solenoid, the shifter will stick in park. Or if are already in gear and want to shift to park, the key won't come out.
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Monday, February 8th, 2021 AT 12:24 PM (Merged)
Tiny
JESSI BUNYARD
  • MEMBER
  • 1 POST
  • 1994 GMC SIERRA
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 208,507 MILES
I tried turning my key off and my ignition won’t turn off.
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Monday, February 8th, 2021 AT 12:24 PM (Merged)
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Just to be clear, will the key remain in the on position or will it go back to the ACC position but just not come out.

If the key will not turn at all and it stuck in the on position, then I suspect the cylinder is the issue.

However, if it is only going to the ACC position but not go to the off position and come out then I suspect you have an issue with the interlock solenoid. However, these are different issues so we need to clarify it first.

If you can get a quick video of this issue that will really help. Thanks
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Monday, February 8th, 2021 AT 12:24 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,702 POSTS
Here is how you can replace the ignition tumbler and lock assembly in the diagrams below. Check out the diagrams (below). Please let us know what happens.
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Monday, February 8th, 2021 AT 12:24 PM (Merged)
Tiny
TONELIOUS
  • MEMBER
  • 2 POSTS
  • 1991 GMC SIERRA
I am trying to replace ignition switch but I cant get the new switch or the old one back on actuator rod and lining up with the mounting holes, the rod is to far forward to line up with holes. I am talking about the actual switch not the key switch. What am I missing or doing wrong.
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Monday, February 8th, 2021 AT 12:25 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
IGNITION SWITCH Removal 1. Remove steering column-to-dash panel bracket. Lower steering column. Remove ignition switch retaining screws. Place ignition switch lock cylinder in LOCK position. 2. If cylinder lock was removed, the actuating rod to the switch should be pulled up until there is a definite stop, then moved down one detent, which is the LOCK position. Disconnect electrical harness connectors. Remove ignition switch assembly. See Fig. 1. Fig. 1: Identifying Column Switches Courtesy of GENERAL MOTORS CORP. Installation Place ignition switch in LOCK position. See Fig. 2. Install ignition switch. Ensure actuating rod is aligned with ignition switch. To complete installation, reverse removal procedure. Fig. 2: Identifying Ignition Switch LOCK Position Courtesy of GENERAL MOTORS CORP. NOTE: It is not necessary to remove steering wheel. Ignition switch is mounted on top of steering column, near front of dash. NOTE: Use only specified screws. Using screws that are too long may prevent column from compressing under impact.


https://www.2carpros.com/forum/automotive_pictures/62217_gmc1_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_gmc2_1.jpg

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Monday, February 8th, 2021 AT 12:25 PM (Merged)
Tiny
74ROD
  • MEMBER
  • 2 POSTS
  • 1990 GMC SIERRA
Interior problem
1990 GMC Sierra 6 cyl Two Wheel Drive Automatic

how do I replace a worn ignition cylinder key switch?
Picture instructions greatly appreiciated.
Thanks,
Rod
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Monday, February 8th, 2021 AT 12:25 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Remove the steering wheel.
Remove the turn signal switch. It is not necessary to completely remove the switch from the column. Pull the switch rearward far enough to slip it over the end of the shaft, but do not pull the harness out of the column.
Turn the lock to Run.
If necessary, remove the ignition key.
If equipped, remove the buzzer switch assembly.
Remove the lock retaining screw and remove the lock cylinder.

WARNING
If the retaining screw is dropped on removal, it may fall into the column, requiring complete disassembly of the column to retrieve the screw.


https://www.2carpros.com/forum/automotive_pictures/261618_1_202.jpg



To install:

Rotate the key to the stop while holding onto the cylinder.
Push the lock all the way in.
Install the screw. Tighten the screw to 40 inch lbs. (5 Nm) for regular columns, 22 inch lbs. (2.5 Nm) for tilt columns.
Install the turn signal switch and the steering wheel.
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Monday, February 8th, 2021 AT 12:25 PM (Merged)

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