Where is radiator drain plug on a 2006 buick lucerne

'"Lighter Ports"? You mean accessory power outlets and cigarette lighters?

Fuses 26 and 31.

Buick Lucerne (2006-2011) fuses and relays

Fuse Box Diagrams https://fuse-box.info > buick > buick-lucerne-2006-20...

Cigar lighter (power outlet) fuses in the Buick Lucerne are the fuses ? F14 and F23 in the Rear Under seat Fuse Box (2006-2007) or fuses ? F26 and F31 in the Rear ...

2008 Buick Lucerne fuse box diagram

StartMyCar https://www.startmycar.com > Lucerne > Fuse box
The 2008 Buick Lucerne has 2 different fuse boxes: Underhood Fuse Block diagram. Rear Underseat Fuse Block diagram. Buick Lucerne fuse box diagrams change ...

Question edited for clarity and add maker.
Question moved to model category.

2006 Buick Lucerne Owner Manual M - Dealer E Process

dealereprocess.org https://cdn.dealereprocess.org > servicemanuals
2006 Buick Lucerne Owner Manual M ... Keep this manual in the vehicle, so it will be there if ... A French language copy of this manual can be obtained.
416 pages

2006 Buick Lucerne - Owner's Manual - 416 Pages - PDF

OwnersManuals2.com https://ownersmanuals2.com > buick > lucerne-2006-o...
2006 Buick Lucerne - Owner's Manual. Posted on 10 Apr, 2020. Model: 2006 Buick Lucerne Pages: 416. File size: 3 MB. Download from Buick.com. Online Viewer.

Unscrew yer drain plug at the bottom of yer radiator and let the old stuff run out then put the plug back in and gitcher hose and refill then drain again and give it another hose out then putcher plug back in , tighten up and refill with coolant. Easy job, 15 minutes.

It is not in the radiator, if it has one it is by the thermostat housing on the engine.

There are two causes; If the battery dies when the car sits then there is a parasitic drain, otherwise it is the alternator

There are 2 different engines that came in the Lucerne in 2006 and I am not sure which one the CXS had. In any case below are pictures of both engines as well as locations. If you have the 3.8 liter (6 cylinder) engine you can add coolant directly to the radiator in the spot marked "A". But on your regular fluid checks you want to make sure that where the "B" is marked that the overflow tank there has fluid up to the line that says "full". If you have the 4.6 liter (8 cylinder) engine the overflow tank and where you fill up the radiator are the same (location "A") so that is the location you would fill the radiator as well as check to make sure there is coolant to the "full" line on the tank on your regular fluid checks, When you look at the pictures below you will understand easier. I hope this helps and good luck.

If you want to flush the raditor remove the big hoses, don't worry with the drain plug as you can't flush it good enough with the drain open anyway. If your just changing the fluild you can drain it and fill it but thats not flushing it. remove the therostate too and flush the engine and remove the heater hoses and flush them too. As you may not know what kind of antifreeze is in the motor now you need to get all of it out as some kinds of antifreeze don't mix and make a clogging slime instaed of good coolant. Do it right or take it to a shop that will.

Ok looking at all different Manufactors, and i have'nt seen one with a radiator drain plug..So if you are tring to flush your raditor, just take off the bottom radiator hose, and run a hose in the radiator, and flush it out the best way you can...Then top it off with a Gallon of coolant, and you should be fine...Goodluck...

Things you will need:
Radiator coolant mixture (get from garage)
Radiator flush fluid (also from garage)
Distilled water (Or if your me garden hose water ;) )

Take off the radiator cap when engine is COOL. Find the drain plug located in the bottom of the radiator (normaly hand tight) and let it drain out into a catch container. Put the drain plug back in, follow the instructions on the flush container topping the radiator back up. Let engine run as directed on bottle and then carefuly undo the radiator cap using a rag as not to burn yourself. Then remove the plug again and drain out the flush fluid. Then repeat the process with the radiator fluid as instructed on the bottle.