Buick Cars & Trucks - Recent Questions, Troubleshooting & Support

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Abs module location 2000 buick century

Electronic Brake Control Module (EBCM) Left rear of the engine compartment, near the left strut tower
2/4/2023 10:24:48 AM • 2000 Buick... • Answered Yesterday
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2003 Buick Century. My license plate bulb and the lights on the rear central panel are out.

Question edited for clarity. Question moved to model category. Check where the earth from those lights meets the bodywork. It is a known issue https://www.google.com/search?q=2003+Buick+Century.+My+license+plate+bulb+not+working
1/31/2023 2:47:05 AM • 2003 Buick... • Answered on Jan 31, 2023
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My 2006 Buick Lacrosse engine light is on. It scans coolant thermostat but I am having no trouble with the thermostat. It warms up properly and does not over heat.

I had a similar issue and queried it twice with the dealership and my tyre guy. The tyre guy was the most helpful told me that the ECM looks for the temperature to rise so many degrees in a certain number of minutes and points to a failing thermostat. Like you I said my heating works fine. The Engine Light bugged my so the next time I got my Winter/Summer tyres changed, I had the thermostat changed and the problem was fixed. You need a new thermostat.
1/29/2023 12:33:53 AM • 2006 Buick... • Answered on Jan 29, 2023
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What is the diagram for a 2006 Buick Lucerne brake lines

Question edited for clarity. Wrong type of Brake - Break. Easy way to remember 'brAke' = Automobile. They leak because they exposed to water and salt and they rust.

2006-08 Buick Lucerne 3.9L V6 4.6L V8 Complete Brake ...

https://www.inlinetube.com > products > sblb0601 This preformed complete brake line kit will replace all the metal brake lines on your vehicle and includes the master cylinder lines, left front line and right ... US$251.00 · ‎In stock https://www.google.com/search?q=2006+Buick+Lucerne+brake+lines ..
1/28/2023 6:39:21 PM • 2006 Buick... • Answered on Jan 28, 2023
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Cruise control on 97 Buick LeSabre intermittently works...

If the cruise control on your 1997 Buick LeSabre is intermittently working, there are a few potential causes that you can check:
  1. Vacuum leaks: The cruise control system on your vehicle uses vacuum to operate, so if there is a leak in the vacuum lines, the system may not work properly. Check for any visible leaks and repair them if necessary.
  2. Throttle position sensor: The throttle position sensor (TPS) sends a signal to the cruise control system to tell it the position of the throttle. If the TPS is malfunctioning, the cruise control may not work properly.
  3. Servo Motor: The servo motor is responsible for engaging and disengaging the cruise control system. It may be that this motor is faulty or that the gears inside the servo motor have worn out.
  4. Speed sensor: The speed sensor sends a signal to the cruise control system to tell it the vehicle's speed. If the sensor is faulty, the cruise control may not work properly
  5. Vehicle Speed Control (VSC) module: This module is responsible for controlling the cruise control system. If it's malfunctioning, the cruise control system will not work correctly
It is highly recommended that you take your vehicle to a qualified mechanic to diagnose and repair the issue, as cruise control systems can be complex and require specialized knowledge and equipment to diagnose and repair.
1/26/2023 4:24:06 PM • Buick Cars &... • Answered on Jan 26, 2023
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1990 buick park ave transmission goes from 1st to second to neutral

check level and examine trans fluid if smells burnt or is brownish can try filter and flush ---if same possible torque converter --valve body -or gear -clutch pack which you would need a trans shop to assist in diagnosis
1/23/2023 2:40:57 PM • Buick Cars &... • Answered on Jan 23, 2023
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I need to replace the main power fuse on my 1985 buick electra. I can't find it. Can you help me

The main power fuse on a 1985 Buick Electra is likely located in the engine compartment fuse box. The fuse box is typically located near the battery and can be found by following the positive battery cable. If you are having trouble locating the fuse box, consult your vehicle's owner manual for specific location and a diagram of the fuse box layout. The main power fuse, also known as the "battery fuse" or "fusible link," is responsible for protecting the electrical system from damage caused by a power surge or short circuit. The fuse is usually a large, cylindrical fuse that is located in the main power distribution circuit. It will be the largest fuse in the box Once you've located the main power fuse, you will need to remove it to check its condition. If the fuse is blown, you will need to replace it with a new one of the same amperage rating. It is recommended that you use only fuses that are specifically designed for your vehicle, and that you consult your owner's manual or a professional mechanic for the correct amperage rating. It's important to note that working on electrical systems can be dangerous if you don't have the proper knowledge, so if you're unsure about how to proceed, it's best to consult a professional mechanic.
1/23/2023 9:49:40 AM • Buick Cars &... • Answered on Jan 23, 2023
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How do you get the back door open on a 2006 Buick Lucerne won't open from inside or out

SOLVED!!!!! Both of my rear doors stuck shut, wouldn't open from outside or inside, the locks seemed to be working properly. After scouring the web I found a post explaining a design flaw was responsible. If the doors were unlocked while someone was pulling on the door handle the mechanism would get stuck. I was able to get the inner door panel removed without breaking anything, only the backseat bottom needs to be removed. It takes some finesse to get the bottom clips undone but IT IS POSSIBLE. Once I had the door panel removed I was disappointed that pulling on the lever from inside wasn't working to disengage the door. Finally I recalled the post that explained why so many people were experiencing this issue with the cars. I reversed the action that caused the issue to begin with, pulling the lever thats connected to the door while holding it I unlocked the door and it finally disengaged. I will post of video when i get around to the other backdoor
1/21/2023 5:22:26 AM • Buick Cars &... • Answered on Jan 21, 2023
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Heater core is working but car is not blowing hot air

Regarding this types of problem,i suggest you to go through this help links.Click the link below to go through the procedure and troubleshoot the problem :----

HOW TO REPLACE AN UPPER RADIATOR HOSE

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-upper-radiator-hose.html

-------------HOW TO REPLACE A LOWER RADIATOR HOSEhttp://schematicsdiagram.blogspot.com/2011/07/how-to-replace-lower-radiator-hose.html----------How to Flush Heater Core?http://schematicsdiagram.blogspot.com/2011/12/how-to-flush-heater-core.html------------

For heater core replacing procedure. I suggest you to go through this related help links.Its all complete step by step procedure: ----How to replace heater core for All car models?

Click the link below: ---

http://technoanswers.blogspot.com/2011/11/how-to-replace-heater-core-for-all-car.html

-------------- How to Flush Heater Core?

http://schematicsdiagram.blogspot.com/2011/12/how-to-flush-heater-core.html

--------------- How to Remove Heater Core ?

http://howtobyme.blogspot.com/2011/12/how-to-remove-heater-core-on-2008-honda.htmlHeater Core Replacement?

http://howtobyme.blogspot.com/2011/12/honda-heater-core-replacement.html

------------To replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on.html------

How to replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on_10.htmlHow to replace heater core on Buick Regal?

http://howtobyme.blogspot.in/2012/02/how-to-replace-heater-core-on-buick.html----------This will help.Thanks.

1/21/2023 2:54:52 AM • 2001 Buick... • Answered on Jan 21, 2023
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I have a 2008 Buick Enclave the anti-theft deterrent system light comes on tried a couple of procedures of turning car on and off for 10 minutes nothing has worked call still will not start replaced deterrent system on ignition replace battery new alternator can't get car started

replaced deterrent system on ignition replace battery new alternator can't get car started ???? Your a parts changer not a technician . Do yourself a favor an take it to a qualified repair shop , one that know's to hook up a factory or some other type professional scan tool an check for DTC'S - diagnostic trouble codes in the theft deterrent control module . An after changing the module it needs to be programmed . DEALER
1/21/2023 1:43:54 AM • Buick Cars &... • Answered on Jan 21, 2023
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How to fix code po711 on 2012 Buick lacrosse

Remove the case side cover. Refer to Control Valve Body Cover Replacement .
1/20/2023 7:16:38 PM • Buick Cars &... • Answered on Jan 20, 2023
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Throttlebody torque spec bolts 2009 Buick lacrosse 3800 series Engine

Throttle Body Nut 10 Nm (89 inch lbs.) Throttle Body Support Bolt (VIN K) 10 Nm (89 inch lbs.)
1/19/2023 6:36:48 PM • Buick Cars &... • Answered on Jan 19, 2023
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1990 Buick Park Avenue. Code 41 and 42. 3800 VIN C engine.

Question edited for clarity and typos. Question moved from Misc to model category. Camshaft magnets https://www.google.com/search?q=1990+Buick+Park+Avenue+replace+cam+magnets What you really need is a mobile auto electrician with a prograde scan tool computer to diagnose and test all the sensors. Code 41 https://www.google.com/search?q=1990+Buick+Park+Avenue+code+41 Code 42 https://www.google.com/search?q=1990+Buick+Park+Avenue+code+42 ..
1/18/2023 7:39:33 PM • 1991 Buick Park... • Answered on Jan 18, 2023
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2004 Buick Rendezvous speedometer fluctuates at low speed. Recently, it stopped working completely.

Try to buy the New one and test is going to give
1/17/2023 11:27:03 AM • Buick Cars &... • Answered on Jan 17, 2023
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2007 Buick Terraza. Where is my shunt resistor in my vehicle please?

Question edited for clarity. Question moved to model category. Google normally knows everything like this, but has only 'sort of' heard of a 'shunt resistor'. Take a month subscription to AllData. https://www.google.com/search?q=2007+buick+terraza+shunt+fuse+location ..
1/15/2023 6:03:54 AM • 2007 Buick... • Answered on Jan 15, 2023
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2005 Buick lacrosse cxs first highbeams went out then low beams but all other lights work.

Headlamps You can use the headlamps two different ways. • Place the headlamp switch in the HEAD position for normal operations • Place the headlamp switch in the OFF position for automatic lamp control (ALC) operation. During ALC the low beam headlamps are ON for daytime running lamp (DRL) operation in daylight conditions at reduced intensity or low beam headlamps ON at full intensity with exterior park lamps ON in low light conditions. The body control module (BCM) applies a pulse width modulated (PWM) voltage to the headlamp module and high beam relay in the underhood fuse block. The ground for the headlamp module is supplied from G113 or G115. For normal manual low beam operation when the headlamp switch is place in the HEAD position, ground from G202 is applied through the headlamp switch and to the BCM through the headlamp switch headlamps ON signal circuit. The BCM then applies a PWM voltage to the headlamp module/high beam relay voltage supply circuit. The headlamp module then applies battery positive voltage through the left front (LF) and right front (RF) LO Beam fuses to the left and right low beam headlamps. The ground for the left headlamps is supplied by G101 and the ground for the right headlamp is supplied by G100. For high beam operation, ground is applied at all times to the headlamp dimmer switch from G202. When the headlamp dimmer switch is placed in the HIGH position, ground is then applied through the headlamp dimmer switch signal circuit to the BCM. The BCM then applies a ground to the headlamp high beam relay control circuit. This energizes the HI Beam relay, the relay then applies battery positive voltage through the LF and RF HI BEAM fuses to the LF and RF high beam headlamps. The ground for the left headlamps is supplied by G101 and the ground for the right headlamp is supplied by G100. The BCM then sends a class 2 message to the instrument cluster in order to illuminate the high beam indicator lamp. If the headlamp switch is left in the HEAD position, the inadvertent power control feature will turn OFF the headlamps after 10 minutes after you turn the ignition switch to the OFF position. If you place the headlamp switch in the head position after the ignition switch has been turned OFF, or if the ignition switch is in ACCY position, the headlamps will remain ON until you turn them OFF or until the battery runs dead.
1/12/2023 6:15:11 PM • Buick LaCrosse... • Answered on Jan 12, 2023
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Intake manifold gasket / replace

3.8L Engine

NOTE The 3.8L (VIN K) non-supercharged engine uses a two-piece intake manifold consisting of an upper air plenum which mounts the throttle body and a lower intake manifold assembly which houses the fuel injectors. The 3.8L (VIN 1) supercharged engine uses a similar lower intake manifold. The supercharger serves as the upper manifold.
Lower Manifold

NOTE Two bolts which fasten the lower intake manifold to the cylinder head are accessible only after the upper intake manifold is removed. These bolts are located in the right front and left rear corners of the lower intake manifold. Remove the upper intake manifold to service the lower intake.
The 3.8L (VIN 1) supercharged engine uses a manifold similar to the 3.8L (VIN K), but the supercharger serves as the upper manifold.
  1. Disconnect the negative battery cable.
  2. On 3.8L (VIN 1) engines, remove the supercharger assembly. Please see the procedure in this section.
  3. Remove the upper intake manifold using the procedure above.
  4. Remove the EGR outlet pipe from the intake manifold.
  5. Detach the engine coolant temperature sensor wiring harness from the sensor.
  6. Remove the lower intake manifold bolts and carefully lift off the manifold.

To install:


0900c15280269f1b.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Lower intake manifold bolt torque sequence-3.8L (VIN K) engine
  1. Clean all parts well with degreaser, especially the gasket seal surfaces on the upper and lower manifold pieces and between the lower manifold and the cylinder heads..
  2. Install new gaskets to the cylinder heads and new seals to the engine block. Carefully lower the manifold into place. Apply thread-locking compound to the bolt threads. Make sure to install the two hidden bolts in the lower intake manifold. Hand start all bolts, then torque evenly to 11 ft. lbs. (15 Nm). Follow the toque sequence, starting in the center, then working outwards in a circle.
  3. Install the remaining components in the reverse order of the removal process.

Upper Intake Manifold (Plenum)
  1. Disconnect the negative battery cable.
  2. On 3.8L (VIN 1) engines, remove the supercharger assembly. Please see the procedure in this section.
  3. Tag for identification, then remove the right side spark plug wires.
  4. Disconnect the ignition wires from the fuel rail.
  5. Remove the fuel rail. Please see Section 5.
  6. Remove the cable bracket from the intake manifold.
  7. Remove the throttle body.


NOTE Two bolts which fasten the lower intake manifold to the cylinder head are accessible are accessible only after the upper intake manifold is removed. These bolts are located in the right front and left rear corners of the lower intake manifold.
  1. Remove the upper intake manifold bolts and carefully lift the upper intake manifold from the engine.



0900c15280269f1c.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Upper intake manifold and bolt torque sequence-3.8L (VIN K) engine
To install:
  1. Clean all parts well with degreaser, especially the gasket seal surfaces on the upper and lower manifold pieces.
  2. Install new gaskets to the cylinder heads and new seals to the engine block. Carefully lower the manifold into place. Make sure to install the two hidden bolts in the lower intake manifold. Hand start all bolts, then torque evenly to 89 inch lbs. (10 Nm). Follow the torque sequence, starting in the center, then working outwards in a circle.
  3. Install the remaining components in the reverse order of the removal process.
1/12/2023 2:11:33 AM • 1999 Buick Regal • Answered on Jan 12, 2023
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Buick LeSabre 3.8. What is the torque on upper & lower intake.

Question edited for clarity and spelling of the model. Question moved to model category. For the lower intake: Step 1 - Tighten down to 62in/lbs (not ft/lbs) Center bolts first then outer bolts - Bring all bolts to finger tight then tighten in 1/4 turn increments till proper torque is achieved. Step 2 - tighten down to 115in/lbs (not ft/lbs) Center bolts first then outer bolts - Tighten in 1/4 turn increments till proper torque is achieved. For upper intake Tighten to 18ft/lbs (not in/lbs) starting from the center and working out in a criss-cross pattern - Bring all bolts to finger tight then tighten in 1/4 turn increments till proper torque is achieved. https://www.google.com/search?q=buick+lesabre+3.8+intake+manifold+torque+specs ..
1/12/2023 2:09:25 AM • Buick LeSabre... • Answered on Jan 12, 2023
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I have a 1968 Buick skylark custom that I am having some trouble wiring the fuse box any help? Diagram anybody? Haven't been able to find anywhere

I believe old Chilton manuals had a complete wiring diagram. Might see if you can find one. Or just replace the entire harness with one from Classic Industries or go aftermarket like Painless or Haywire.
1/11/2023 1:59:15 PM • Buick Cars &... • Answered on Jan 11, 2023
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