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How to Replace Front Door Lock Cylinder 95-99 GMC K1500

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  1. step : Removing the Door Panel (0:42)
    • Remove the two Phillips head screws from the door pull
    • Pry off the door handle bezel with a trim tool
    • Pry off the mirror base panel with a trim tool
    • Pry off the power window switch panel with a trim tool
    • Disconnect the tweeter electrical connector
    • Disconnect the window switch electrical connectors
    • Pry out the door light with a trim tool
    • Disconnect the door light electrical connector
    • Pry out the bottom of the door panel with a trim tool
    • Pry out the clip at the top front corner of the door panel
    • Lift the door panel up and off the door
  2. step : Removing the Interior Accessory Panel (3:16)
    • Carefully peel off the inner water shield
    • Roll the window all the way down
    • Remove the ten 7mm screws around the panel
    • Remove the one 10mm screw near the speaker
    • Pull the panel forward
    • Pry off the latch and remove the handle rod
    • Pop the handle rod out of its retainer
    • Pry off the latch and remove the lock rod
    • Pop the lock rod out of its retainer
    • Pull the lock rod out of the actuator
    • Pop out the tab for the courtesy light
    • Disconnect the door lock actuator connector
    • Pop the retainer through the door
    • Pop out the rest of the retaining clips
    • Disconnect the window motor
    • Disconnect the door speaker
    • Pull the harness through the door
    • Slide the accessory panel forward until the window roller is out of the channel
    • Slide the guide out the back and remove the panel
  3. step : Removing the Exterior Door Handle (6:16)
    • Lift the window all the way up
    • Secure the window in place with painter's tape
    • Remove the 10mm bolt on the door jamb side of the handle
    • Remove the 10mm bolt on the backside of the door handle
    • Remove the clip from both of the latch rods on the door handle and door lock
    • Pop the rods out of the handle
    • Pry the handle out of the door
  4. step : Removing the Door Lock Cylinder (7:50)
    • Push the hook on the cylinder with a flat blade screwdriver
    • Remove the cylinder
  5. step : Installing the Door Lock Cylinder (8:09)
    • Press the lock cylinder into the handle until it snaps in
  6. step : Reinstalling the Exterior Door Handle (8:27)
    • Connect the door handle rod to the handle
    • Reinstall the handle into the vehicle
    • Line up and reinstall the two 10mm bolts to the handle
    • Pop the lock rod into its clip
    • Remove the tape holding up the window
    • Carefully lower the window to the bottom stop
  7. step : Reinstalling the Accessory Panel (9:06)
    • Reinstall the door speaker connector
    • Connect the window motor connector
    • Slide the panel and regulator into the window track
    • Slide the panel forward
    • Install the front part of the regulator's wheel into its slot
    • Reconnect the door lock rod to the interior handle
    • Reconnect the door handle rod to the interior handle
    • Engage the lock actuator
    • Snap both rods into their guides
    • Lift the accessory panel into place
    • Clip the wiring harnesses into place
    • Run the harness through and reconnect the door actuator
    • Tighten the ten 7mm screws to the panel
    • Tighten the one 10mm screw
    • Carefully press on the water shield
  8. step : Installing the Door Panel (11:42)
    • Lift the door panel into place
    • Pull the wiring harnesses through the window switch opening
    • Push in the door panel clips
    • Clip on the door handle bezel
    • Connect the door light electrical connector
    • Clip on the mirror base trim panel
    • Insert the two Phillips screws into the door pull
    • Connect the electrical connector to the tweeter
    • Connect the two electrical connectors to the window switch
    • Push the switch panel into the door

Hi, I'm Mike from 1AAuto. We've been selling auto parts for over 30 years! We're dedicated to delivering quality auto parts, expert customer service, and fast and free shipping, all backed by our 100% satisfaction guarantee. So visit us at 1AAuto.com, your trusted source for quality auto parts.

In this video we're going to be working with our 1996 GMC Sierra. We're going to show you how to remove and replace your vehicle's door lock cylinder. If you like this video, please click subscribe. We have a ton more information on this and many other vehicles. If you ever need parts for your truck, you can follow the link down in the description over to 1AAuto.com.

Here are the items you'll need for this repair: Interior trim removal tool, 7mm socket, 10mm socket, ratchet, socket extension, Phillips screwdriver, flat blade screwdriver, painter’s tape, pick tool

Here are the items you'll need for this repair: Interior trim removal tool, 7mm socket, 10mm socket, ratchet, socket extension, Phillips screwdriver, flat blade screwdriver, T30 socket, painter’s tape, pick tool

Remove the two Phillips head screws inside of the armrest on the door. Do this with a Phillips head screwdriver. To remove the bezel around the interior door handle, you need to kind of get in there with a trim tool or a flat blade screwdriver, and push down on the tab to release it. There are three: one at the top, one at the bottom, and one on the side.

Remove the extension at the top of the door panel by prying out with a trim tool. Using your trim tool, pry up at the back of the power window switch. Lift it up and pull back to release the hook at the front. Disconnect the connector for your tweeter. Pop up the tab on this two pin connector at the front of the window switch, and pop the connector out, and then push down on the tab for the main connector and remove that from the switch. I'm using a pick here. You could also use a small flat blade screwdriver or a trim tool if you had to, really whatever works best for you.

Using the trim tool, pop out on the door reflector and remote the connector. This is another one of the ones we'll have to lift up on the tab with a pick. Using a trim tool, pry out the bottom of the door. You may need to work it a little bit to figure out where the tabs are. You'll also need to pop out this pin at the top on the front of the door. Once all the tabs are out, lift the panel up and remove it from the door.

Peel off the inner water shield on the door. There's also a small piece over in the corner. Make sure your window is rolled all the way down. There are ten 7 millimeter screws around the perimeter of the inner panel. One under the speaker here that's a little tricky to see, and a 10 millimeter at the front. We'll need to remove all of those with a socket and ratchet. Pull the panel forward. Pull out the handle rod. It may help to have a tool to help you get some leverage on it. You'll also want to pop that out of its guide clip. Same thing with the lock rod down here. We'll also need to pop this out of its guide rod and pull it out of the lock actuator as well. Pop out the tab for the courtesy light in the door. Lift up on the cover for the door lock actuator, and remove that connector. You need to fish it out and around. Pop that retainer through, and then pop out all the rest of the retaining clips to remove the harness from the door.

You'll also need to unplug the window motor and the door speaker. Pull the harness through the door. Slide the door panel forward until the window roller is out of its channel, then slide the guide out of the back, and remove the assembly from your vehicle.

Lift up on the glass in the door. Bring it all the way up, and use some painter's tape to secure it in the up position. Move the 10 millimeter bolt on the door jamb side of the handle. You'll also need to remove the 10 millimeter bolt on the backside of the door handle. You'll need to remove both of the rods for the door handle, as well as the door lock. You may need a small flat blade screwdriver to help get the leverage you need to remove them. It's kind of tough to see, but you can sort of feel in there with a small screwdriver. Hopefully get enough leverage to pop that out. Remove the door handle from the door. Just like you did to remove your lock rod, you're going to want to pry this clip up or you can just split it like I am here. Remove the latch from the vehicle.

To remove your door lock cylinder, use a small flat blade screwdriver and push down on this hook. Then, simply remove the lock cylinder from the handle.

Install your door lock cylinder. Simply push it in until the catch snaps into place. Make sure it's in there nice and secure.

Reconnect the door latch rod, and reinstall the door handle into the vehicle. Line up your door handle and reinstall the two 10-millimeter bolts. Pop the lock rod back into its clip.

Remove the tape that's holding your window up, and support the window from the bottom side, then carefully lower your window and allow it to rest on the bottom stop.

Reconnect your door speaker and your window motor, and send the rest of your wiring harness back through the door. Slide the back half of your window regulator back into the window track. Once the back is in, slide forward and install the front part of the regulator into the glass as well. Reconnect the door lock as well as the door handle. Don't forget to engage the lock actuator, and snap both rods back into their guides.

Realign your door panel. Reinstall your wiring harness. Make sure that all the tabs and retainers go back in their appropriate places. Make sure you run the harness through, and reconnect the door actuator as well. Lock the clasp in for your reflector, courtesy light, and reinstall the ten 7 millimeter screws around the perimeter, as well as the one 10 millimeter. Reinstall the water shield. Sometimes this adhesive doesn't really want to stick a second time, if that's the case, it's all right to put some tape on there to secure the edges.

Pull your wire harness back through the door and lay the top edge into the door frame. Line up the plastic containers and push them all back into place. Reinstall the inner door handle bezel by lining it up and snapping it in. Reinstall your reflector. Place the upper door extension into place. Reinstall the two Phillips head screws in the armrest.

Reconnect your door speaker as well as the two electrical connections on the power window switch. Slide the front hook into the door panel. Snap the back into place, and you're good to go.

Thanks for watching. Visit us at 1AAuto.com for quality auto parts, fast and free shipping, and the best customer service in the industry.

Tools needed for replacement:

    General Tools

  • Pick

  • Materials, Fluids, and Supplies

  • Painter's Tape

  • Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Screwdrivers & Related

  • Phillips Head Screwdriver
  • Flat Blade Screwdriver

  • Sockets - Metric

  • 7mm Socket
  • 10mm Socket

  • Specialty Tools

  • Door Panel Removal Tool


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