20 Most Recent 2007 Buick Lucerne Questions & Answers

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Why my 07 Buick Lucerne will not start? I've changed the heads, gaskets, coil pack, spark plugs, wires, fuses, and crank sensor.

If the engine cranks, check for engine codes. Start there. Check for sparks and fuel
7/6/2022 2:42:06 AM • 2007 Buick... • Answered on Jul 06, 2022
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Why my 07 Buick Lucerne won't start?

re check your work [that all sensors -- wiring and timing are correct]] scan for codes-- what did mech find--are you getting spark
4/30/2022 2:18:05 PM • 2007 Buick... • Answered on Apr 30, 2022
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2007 Buick lucerne code p420 , .

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.
4/20/2022 5:48:34 PM • 2007 Buick... • Answered on Apr 20, 2022
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How do you take apart the dashboard to replace the ambient air temperature sensor on a 2007 Buick Lucerne?

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.
1/12/2022 7:57:44 PM • 2007 Buick... • Answered on Jan 12, 2022
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Crank fuse blown on a 2007 Buick Lucerne V8. Replaced 3 weeks later blown out again.What could be the issue.

If the fuse blows during starting, replace the solenoid.
6/20/2021 4:41:11 PM • 2007 Buick... • Answered on Jun 20, 2021
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I replaced the stereo to my 2007 Buick Lucerne.

Good Job!!
5/12/2021 6:46:06 PM • 2007 Buick... • Answered on May 12, 2021
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4.6l V8. How many knock sensors?

it has 2
12/26/2020 3:22:22 AM • 2007 Buick... • Answered on Dec 26, 2020
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I have a 2007 Buick Lucerne, I replaced the fuse for the trunk two weeks ago and now it's not working again any suggestions

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.
7/6/2019 8:01:21 PM • 2007 Buick... • Answered on Jul 06, 2019
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2007 Buick Luzern fan motor for the heater cuts on and off

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.
2/2/2019 7:58:09 PM • 2007 Buick... • Answered on Feb 02, 2019
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All 2007 Buick Lucerne taillights out,which fuse controls

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.
11/14/2018 3:06:23 AM • 2007 Buick... • Answered on Nov 14, 2018
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Replacing headlight bulbs in 2007Buick lacerene

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
9/22/2018 12:43:11 AM • 2007 Buick... • Answered on Sep 22, 2018
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I am trying to locate the TCM in my 2007 buick lucerne

left rear of engine compartment
3/9/2018 4:04:46 AM • 2007 Buick... • Answered on Mar 09, 2018
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2007 buick Lucerne power brake hose locations

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.
1/23/2018 6:01:20 PM • 2007 Buick... • Answered on Jan 23, 2018
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How do you get the air out of a coolant system in a 2007 Buick Lucerne ?

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.
3/7/2017 6:22:03 PM • 2007 Buick... • Answered on Mar 07, 2017
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