Changing rear blinker lamp 2005 uplander

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.

to remove the tail light asm from2003-2004 rio you will need to remove the three nuts inside and also pull carpet back to take a good look at the rear of the lamp, you will then need a plastic wedge to go behind the light and body on the outter edge this will release the pinch stud on the end of the lamp and out comes the lens asm, hope this helps, good day.

you have to use the tool suplied or a socket NOT a wrench.

I have never done one on this vehicle but have replaced many on all other cars over the years, this is what i experienced, the stud will pound out with a good 2-3 lb. hammer, and the new stud and nut will get pulled back through the empty hole by use of a strong impact wrench...start the stud by hand try to pull it as much as you can through the splined hole in the axle flange, install the new nut backwards on the stud screw it down as far as you can then with the 1/2' drive impact wrench on full throttle tighten the lug nut...by doing this you are pulling the stud through the void hole.
Please remeber to use a small amount of axle grease on the new stud and hole prior to installing the replacement stud and nut.
You prbably have to remove the disc brake caliper and brake pads along with the rear disc brake rotor to gain access to the stud, there should be an access hole also allowing you to get behind the axle flange for removal and installation.
Hope this works.
Happy Motoring!!

they are the locking wheel nuts(lugs)and you will need a key(not a hex allen key)to remove them.if you look close you will see that the sides are not equal.
I use a nut spilitter or an old socket hammered onto the nut to remove it,means replacements but next time you buy a car check to make sure you have the radio code and the wheel nut key.

Item Part Number Description 1 — Rear lamp assembly nuts (3 required) 2 13B504/ 13B505 Rear lamp assembly (RH/LH)

1. Remove the 3 nuts and the rear lamp assembly.
   
   • Disconnect the electrical connector.

There are 2 bolts on the "inside" on the caliper towards the bottom they use an allen wrench socket.

It is posible both bulbs are blown, I have overlooked this before, if not you will have to change the turn-signal switch (in the stering colume.

You will need a star bit. It is similar to an allen wrench but shaped like a star and attaches to a socket wrench

THIS IS IN the corner lamp next to headlight correct? open hood you will see a screw where corner light mounts to headlight. remove screw and light will come out so you can change bulb. it is clipped into fender