Tighten seat The wing nuts will not tighten. Removed them to check, even when all the way up not even close.

There is usually a plastic nut that goes on the bottom and has a wing on it that will catch when you tighten the plastic bolt from above.

There are two(2) nuts under the outside edge of rim of bowl(bottom section)right in front of tank. use fingers to tighten, and pliers to secure. If it will not tighten, then the posts molded in are loose, requiring replacement. Sometimes even if new on these types.

3 wing nuts. here is the info needed.

Service Information

2005 Buick LaCrosse ' Allure, LaCrosse VIN W Service Manual ' Body ' Lighting Systems ' Repair Instructions ' Document ID: 1537542 Tail Lamp, Turn Signal Lamp, High Mount Stop Lamp, License Lamp, Backup Lamp Replacement - Rear


Callout
Component Name
Notice: Refer to Fastener Notice in the Preface section.
Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .
Turn Signal/Stop Lamp Assembly Replacement - Rear 1
Nut, Turn Signal/Tail Lamp (Qty: 3)
Tip
Pull back rear compartment carpet to gain access to lamp.
Tighten
2 N·m (18 lb in)
2
Lamp, Turn Signal/Tail Lamp
Tip
Twist the bulb socket and pull inward to replace the bulb.
License Lamp Replacement 3
Screws, License Lamp (Qty: 2)
Tighten
2 N·m (18 lb in)
4
Lamp, License Lamp
Tip
Twist the bulb socket and pull inward to replace the bulb.

need lock washers.

Consider using a toggle bolt (with wings) and a large stainless steel washer to re-attach the seat.

Hi,
Right behind the bowl on the underside there is a nut on either side that holds the seat on...tighten those nuts and it will tighten down the seat...

heatman101

mAKE SURE "o" RING GROOVES ARE FREE OF DIRT . Then place the O ring ,putting some vaseline on the "O" ring. Then, placing the cover on, totate the cover as you tighten down knob or wing nut.. Just before it is too tight to turn, turn the cover one more time to evenly seat it. Finish tightening. DO NOT OVER TIGHTEN, COVER WILL DISTORT.

Good Luck

Reach under the bowl of the toilet and feel for a rather large wing-nut bolt on each side of the toilet. You must hold these with your hand and tighten the screws with a screwdriver. If you don't hold these wingnuts, then the screws will keep spinning forever and never tighten. Run your hand directly below the toilet just below the screws and you will find them. VERY EASY FIX!