Top 20 2007 Buick Lucerne Questions & Answers

If the engine cranks, check for engine codes. Start there. Check for sparks and fuel

re check your work [that all sensors -- wiring and timing are correct]] scan for codes-- what did mech find--are you getting spark

You need to find a mechanic that is smart enough to use a scan tool that is able to view the live data stream and find the source of the issue. The P0420 code can be frustrating as it is usually something insignificant that sets it. Could be a vacuum leak, and exhaust leak, a bad wire to one of the O2 sensors. It takes time with a scan tool to nail down the cause.

If the fuse blows during starting, replace the solenoid.

Good Job!!

https://www.troublecodes.net/p2codes/p2444/

it has 2

Did the fuse blow again? If yes, that means there's a short circuit somewhere in the wire to the trunk light (or possibly in the lamp itself). These can be hard to track down, but first try checking the accessible places -- lamp, trunk.

Do your dash lights work? They should be on the same circuit. If they work the fuse is ok and the problem could be the bulbs or wiring connections.

I am forwarding a YouTube video that is detailed and easy to follow. It also shows what tools are needed for the repair. https://www.youtube.com/watch?v=UtOKfQHwwTs

2004 Buick Lesabre Vapor Purge Solenoid Valve Go to Bing homepage

left rear of engine compartment

Can you give us more info about the problem? If you have disc brakes on all 4 wheels, each wheel has a brake caliper, the caliper usually has a hose attached to it, if that is what your talking about? With abs, you need to follow proper procedure before taking anything loose or replacing.

In 2007 the Buick Lucerne was equipped with 2 engine options. 3.8 Liter OHV V6 and the Northstar 4.6 Liter V8. Was the cooling system recently opened? What was serviced? The 3.8 has a 7mm bleeder screw on the top of the thermostat housing. A funnel in the radiator is helpful to bleed the air. You will notice the upper radiator hose curves to a higher elevation than the bleeder screw. Manipulation of the hose by hand may be needed to get the air out. I recommend and use a cooling system funnel to help. It minimizes mess as well. ( https://smile.amazon.com/Lisle-24680-Spill-Free-Funnel/dp/B00A6AS6LY/ref=sr_1_1?ie=UTF8&qid=1488855489&sr=8-1&keywords=lisle+cooling+system+funnel ) There are other brands available as well. I do not recall if the Northstar V8 has a bleeder on all models, but some do have a similar bleeder screw. Be sure the system is filled initially and manipulate the hoses up and down as well as squeeze them to get air moving. The Northstar water pump is on the back side of the engine driven by the camshaft. The upper hose runs along the front of the engine bay and connects to the radiator at the top on the passenger side of the engine bay. For both vehicles, fill as much as possible cold. Start and idle. As the temperature increases, I recommend occasionally revving the engine to between 1500 and 2000 RPM to fill heater core and move coolant with a little more force.

Could be ! could also be the blower motor is bad or blower motor control module . Does you buick have manual or automatic climate control ? There is a fuse box under the rear seat ,that is where fuse is for blower motor .HVAC BLWR fuse 40 amp. Chevy Trailblazer EXT Blower Motor Won Turn Off

Spray WD 40 on cable.

On all speeds? Next time it cuts off give the area below the glove compartment a good RAP upwards,if the fan motor starts,change it and the connector to it.

One in each bank. Knock senor 1 and knock sensor 2.

Hi Jill: We just spent $1000 Canadian at the Buick dealer having trouble shooting and repairs done on our 2006 Terraza. One of the remotes had an internal broken circuit. Had to replace the Body Control Module on the AZTEK. Kissed another $1,000 goodbye. Selling it. Frankly, as long as they are working it's fine, but when they start to have problems, it is completely beyond the scope of THIS Fixya ****** to diagnose or attempt to repair. Makes me want to sell and NEVER get another GM. Best of luck.

If I am not mistaken, doesn't it just go thru the plastic trim at the edge of the windshield? That piece just snaps into the dash cap. You should be able to get under one of the edges and pop it up and then work your way across. This should give you access to replace the sensor.