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Home/ Repair guides/ 1999 Buick Century Window Regulator and Motor R…
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1999 Buick Century Window Regulator and Motor Replacement

We seek to develop a trouble-free step-by-step...

iFixit Library 1997–2005 Buick Century Moderate 10 - 15 minutes Guide 74107
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This attributed iFixit guide is displayed through Fixonic's recorded commercial API permission. iFixit remains the independent source and author of the procedure.

Guide overview

Before you begin

We seek to develop a trouble-free step-by-step repair guide for a 1999 Buick Century that meets the criteria set by IFIXIT. Not only is our purpose to repair a failed window regulator and motor for personal and security reasons, but also to demonstrate and breakdown to the inexperienced how to make said repair at a more economically inclined price.

Step 1

Lower Window

1999 Buick Century Window Regulator and Motor Replacement — Lower Window ⌕
  • Lower window to about ¾ of the way down or until the frame that the window sits on is visible in the lower opening.
Step 2

Disassemble Door Panel

1999 Buick Century Window Regulator and Motor Replacement — Disassemble Door Panel ⌕
6-in-1 Screwdriver
TOOL USED ON THIS STEP 6-in-1 Screwdriver Referenced by the iFixit guide
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Phillips #0 Screwdriver
TOOL USED ON THIS STEP Phillips #0 Screwdriver Referenced by the iFixit guide
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  • Locate the 3 screws in the door.
  • 1 screw is in the door latch (phillips head)
  • The other 2 are in the door tray (10mm socket)
Step 3

Disassemble Door Panel (cont'd)

1999 Buick Century Window Regulator and Motor Replacement — Disassemble Door Panel (cont'd) ⌕
  • Pry away the door (a flat head can be used as seen in the image, but any wedge like object would work.)
Step 4

Disconnect Necessary Cables

1999 Buick Century Window Regulator and Motor Replacement — Disconnect Necessary Cables ⌕
  • Tweeter Connection (circled in red)
  • Disconnect the tweeter connection where the red arrow is pointing.
  • Automatic Lock Connection (circled in green)
  • Disconnect the automatic lock connection from its location in the green circle.
Step 5

(Remove Plastic If Applicable)

1999 Buick Century Window Regulator and Motor Replacement — (Remove Plastic If Applicable) ⌕
  • If the internal door panel is covered with protective plastic, remove it before proceeding.
Step 6

Removing The Window Motor

1999 Buick Century Window Regulator and Motor Replacement — Removing The Window Motor ⌕
6-in-1 Screwdriver
TOOL USED ON THIS STEP 6-in-1 Screwdriver Referenced by the iFixit guide
View item
Phillips #0 Screwdriver
TOOL USED ON THIS STEP Phillips #0 Screwdriver Referenced by the iFixit guide
View item
  • Locate and remove the 3 screws holding the window motor in place (Wrench and 10mm socket needed).
  • Disconnect the window motor connection wiring.
  • Wedge in-between the outer shell of the door and the window to hold the window in place (be careful not to damage the window. May have to stick it in at an angle).
Step 7

Removing The Window Motor (cont'd)

1999 Buick Century Window Regulator and Motor Replacement — Removing The Window Motor (cont'd) ⌕
6-in-1 Screwdriver
TOOL USED ON THIS STEP 6-in-1 Screwdriver Referenced by the iFixit guide
View item
Phillips #0 Screwdriver
TOOL USED ON THIS STEP Phillips #0 Screwdriver Referenced by the iFixit guide
View item
  • Locate and Remove the four 10mm screws below the interior door latch.
  • Locate and remove the two 10mm screws on the window frame.
  • Remove the motor and the regulator through the hole.
Step 8

Replace The Motor And The Regulator (Reassembly)

1999 Buick Century Window Regulator and Motor Replacement — Replace The Motor And The Regulator (Reassembly) ⌕
  • Follow steps in reverse order to connect the new window motor and regulator and to reassemble the door panel.