20 Most Recent 2005 Buick LaCrosse Questions & Answers

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2005 Buick Lacrosse cruise not engaging.

You may need to adjust the switch a little. It may be a little tight.
5/7/2022 3:54:14 AM • 2005 Buick... • Answered on May 07, 2022
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2005 Buick Lacrosse. My car starts but when I press the gas nothing happens. It doesn't even rev.

Question edited for clarity. Question moved to sub category. Likely to be the Throttle Position Sensor but you need a scan tool to diagnose.. https://www.google.com/search?q=2005+Buick+Lacrosse+TPS ..
3/27/2022 10:37:39 PM • 2005 Buick... • Answered on Mar 27, 2022
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No brake lights on 05 buick lacrosse

test your brake light switch
2/2/2022 12:47:16 AM • 2005 Buick... • Answered on Feb 02, 2022
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Need help finding location of 2005 buick lacrosse pcm

Hello. You can go online to eBay to find a PCM for your Buick LaCrosse. Include the year, make, model and V.I.N. information to ensure you order the correct PCM. Good luck and keep me informed; if you want to.
9/8/2021 10:28:47 AM • 2005 Buick... • Answered on Sep 08, 2021
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Why won't the car start with the new Crank shaft position sensor installed? 2005 Buick Lacrosse cxl 3.8l engine.

After replacing crank sensor Perform the crankshaft position system variation learn procedure. Refer to Crankshaft Position System Variation Learn ! No you don't need to replace the balancer ! Install a scan tool. Monitor the powertrain control module (PCM) for DTCs with a scan tool. If other DTCs are set, except DTC P0315, refer to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information for the applicable DTC. Select the crankshaft position variation learn procedure with a scan tool. The scan tool instructs you to perform the following: 4.1. Accelerate to wide open throttle (WOT). 4.2. Release the throttle when fuel cut-off occurs. 4.3. Observe the fuel cut-off specifications for the applicable engine. 4.4. The engine should not accelerate beyond the calibrated RPM value. 4.5. Release the throttle immediately if the value is exceeded. 4.6. Block the drive wheels. 4.7. Set the parking brake. 4.8. DO NOT apply the brake pedal. 4.9. Cycle the ignition from OFF to ON. 4.10. Apply and hold the brake pedal. 4.11. Start and idle the engine. 4.12. Turn the A/C OFF. 4.13. The vehicle must remain in Park or Neutral. 4.14. The scan tool monitors certain component signals to determine if all the conditions are met to continue with the procedure. The scan tool only displays the condition that inhibits the procedure. The scan tool monitors the following components: • Crankshaft position (CKP) sensors activity--If there is a CKP sensor condition, refer to the applicable DTC. • Camshaft position (CMP) signal activity--If there is a CMP signal condition, refer to the applicable DTC. • Engine coolant temperature (ECT)--If the engine coolant temperature is not warm enough, idle the engine until the engine coolant temperature reaches the correct temperature. Enable the crankshaft position system variation learn procedure with the scan tool and perform the following: Important: While the learn procedure is in progress, release the throttle immediately when the engine starts to decelerate. The engine control is returned to the operator and the engine responds to throttle position after the learn procedure is complete. 5.1. Accelerate to WOT. 5.2. Release when fuel cut-off occurs. 5.3. Test in progress. The scan tool displays Learn Status: Learned this ignition. If the scan tool indicates that DTC P0315 ran and passed, the CKP variation learn procedure is complete. If the scan tool indicates DTC P0315 failed or did not run, refer to DTC P0315. If any other DTCs set, refer to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information for the applicable DTC. Turn OFF the ignition for 30 seconds after the learn procedure is completed successfully. The CKP system variation learn procedure is also required when the following service procedures have been performed, regardless of whether DTC P0315 is set. • Engine replacement
7/22/2021 5:56:25 PM • 2005 Buick... • Answered on Jul 22, 2021
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BELT ROUTING FOR 2005 BUICK LACROSSE 3.8 MOTOR

  • Hello, I'm Tony and thank you for the opportunity to assist you. You have two choices on your vehicle for belt drives. You can go off of the Vin or more simply weather or not you have a super charger on your vehicle as well. The super charger has two belts. So you either have one belt which is the first diagram or two belts which is the second diagram.
  • Below is the diagram for the serpentine belt. It comes off by simply putting a wrench or long ratchet or belt tool on the bolt indicated and releasing the tention off the belt that way.
11_11_2011_7_41_43_pm.jpg
  • Below is the diagram for the engine with the super charger as well.
11_11_2011_7_44_18_pm.jpg
  • If you have any comments or questions please feel free to ask right here. If you are satisfied with my work please feel free rate this solution and leave a comment for others to know of my quality work.
Regards,Tony
5/31/2021 5:31:33 PM • 2005 Buick... • Answered on May 31, 2021
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3.6l CXS. Where is TCM?

https://m.youtube.com/watch?v=IIl09WBAuOo&noapp=1. https://www.wholesalegmpartsonline.com/showAssembly.aspx?ukey_assembly=402569&ukey_product=2992960 These show location and service
4/19/2021 11:55:34 PM • 2005 Buick... • Answered on Apr 19, 2021
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Can't open my trunk because the battery is dead

OR YOU CAN USE THE CARS KEY/ALARM TAG, IT UNLOCKS THE TRUNK. EVEN IF THE BATS DEAD, MINE OPENED.
4/18/2021 8:41:00 PM • 2005 Buick... • Answered on Apr 18, 2021
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Wet floors on passenger side after it rains.

Is it possible the water is actually coming from the A/C evaporator case, whose DRAIN IS CLOGGED ? The water produced by the A/C then leaks out of the case, down under the carpeting, then depending how vehicle is parked, can flow to the rear floors and carpet. Hope this helps
9/12/2020 6:38:26 PM • 2005 Buick... • Answered on Sep 12, 2020
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How to replace buick lacrosse cxs high pressure steering hose

3.6L V6 Buick Lacrosse (Allure) CXS, 2006: The usual place for the power steering pressure hose to leak copious amounts of fluid is at the pump-end fitting. Don't bother trying to replace the teflon seal on the outside of it in an attempt to stop the leak. This fitting has a hidden internal seal that is designed to allow the metal part of the hose to float in the fitting even after the fitting is properly tightened. The only lasting repair is to replace the hose. On the 3.6 engine, this job is more difficult than average because the hose is a long multi-segment affair that wraps all around the subframe. Some pro shops are even hesitant to take it on, possibly because of poor GM instructions. It takes about 3 hours of labor, unless you have done it before. GM's removal and installation instructions are misleading and confusing; some might say just plain erroneous. They presume a GM hose is being installed, which apparently is not like the original hose, and that requires additional parts and effort. The solution is to install an aftermarket hose such as Edelmann PN 92226; the brand you choose really does not matter, they are all the same. The GM procedure also calls for removing motor mount bolts and lifting the engine. I found that to be unnecessary. Remove the right side wheel and splash shield, which is held on by three plastic push pins. Undo the two steering rack heat shield snaps, using needle nose pliers to reach into the small space, and remove the shield . Take lots of pictures to remind yourself how the hose is routed around the subframe. You may ask yourself how it can possibly be removed; I know I did. Disconnect both ends of the hose. The pump end is best reached with a stubby length 18mm wrench. Despite appearing to be tight in there, the rack end is easy to loosen with a regular 18 mm open end wrench. The 18mm fitting you want to loosen is the one closest to the firewall. Very important: unhook and remove all of the plastic clips than hold the hose assembly in place, unhook the clips that retain a wire bundle to the assembly, and slide off all of the protective sheathings and cushion rings. From underneath, pull the pump end of the hose down under the subframe, and let it hang there. This will allow the metal sections of the hose to start to come away from the subframe rails. Begin to work the rack end of the hose outward toward the wheel well; it is tight in there, the end of the hose has a convoluted metal section, and and at first it may seem impossible to get that past the exhaust down pipe and out using the small space between the rack and the engine block, with the metal section of the return hose also getting in your way. Don't give up; it just takes patience. As the hose assembly comes out into the wheel well, you will be able to gradually turn the metal mid-section of the hose and feed it under the A/C compressor. You are basically turning the whole hose assembly counterclockwise (as viewed from above) in a series of steps until it is out. Eventually, with careful twisting and turning, it will come out. The key is to use the clear space under the A/C compressor and forward to the radiator to maneuver it. With the old hose on the floor under the car, study how it is laid out, and what sections lay along what parts of the subframe. Put the new hose on the floor, and orient it exactly the same. Follow the instructions that came with the new hose to install the included o-ring on the flare fitting at the rack end. I like to shrink a piece of heat-shrink tubing onto the metal flare to protect the o-ring from cuts as it's stretch over it. Once the o-ring is in place, pull the heat-shrink off and discard it. Protect the hose fittings with caps or tape to keep them clean while feeding the hose into position. Starting at the rack end fitting, begin feeding the hose: From under the car, find the gap that's underneath the A/C compressor, between the front of the engine block and the front aluminum subframe cross rail. Feed the hose out toward the wheel well through that gap. Once you get the convoluted metal end piece through there, you can start to turn and maneuver the hose assembly clockwise. Going a little at the time, it can be worked into place, basically following the reverse of the removal. Maybe it's learning curve, but for me the new one went in better than the old once came out. Verify the the o-ring is still on the rack-end fitting, lube it with ATF, and hand start the threads into the rack until you are sure it is threading in properly, and it is not cross-threaded. Tighten it to no more that 20 lb-ft. The pump end fitting already has a white teflon seal on the outside, so all you need to do is lube it, start the threads by hand, and tighten it securely. . I hope this is write-up is helpful. Good luck with the repair!
8/31/2020 2:41:16 AM • 2005 Buick... • Answered on Aug 31, 2020
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Where is the fuse for my 2005 buick lacrosse radio located?

instrument panel fuse box - RDO/AMP fuse 25 amp . Fuse Block - I/P Right side of the I/P, behind the access panel Open the passenger door , at the end of the instrument panel .
3/13/2020 4:47:58 AM • 2005 Buick... • Answered on Mar 13, 2020
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Unable to adjust headlights on 2005 Buick

Had simular problem on my wife's LaCrosse. Was looking for way to adjust, when saw bulbs were not centered behind reflector.Took out
3/10/2020 11:04:31 PM • 2005 Buick... • Answered on Mar 10, 2020
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How to program keyless entry remote for buick lacrosse?

I own a 2007 Buick Lacrosse, but I imported it to Paraguay, South America. Now I bought a new Engine Start Keyless Entry Remote from Amazon, but here we do not have any GM dealer to program the unit. I really need help to program the keyless remote control, I will appreciate very much your help.
3/28/2019 11:06:27 PM • 2005 Buick... • Answered on Mar 28, 2019
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Lowbeams headlamp won,t work on 2005 buick

Start simple. Investigate your fuses, since it is unlikely, but not unheard of, for both low beams to fail simultaneously.

Do you know where your fuses are?
2/6/2019 2:31:03 AM • 2005 Buick... • Answered on Feb 06, 2019
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How to replace the wiper motor on 2005 buick lacrosse clx

Most wiper motor replacements are very similar, the difference may be in the components that you need to remove to access the motor. Here is a video which may help you by providing you an idea of what is required. Hope this helps and good luck. https://www.youtube.com/watch?v=7BTQdl_YeGE
12/27/2018 2:19:54 AM • 2005 Buick... • Answered on Dec 27, 2018
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05 lacrosse when starting it will dies

I found the fix with help from dealer with no charge I forget what the part is called but follow air intake line to top of engine disconnect it- their is a butter fly here that sticks when dirty all you have to do is is get some cleaner from parts store and clean build up out mine runs great now
12/8/2018 3:10:59 PM • 2005 Buick... • Answered on Dec 08, 2018
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How many blend door actuators on 2005 Buick lacrosse

If you have separate heat/cool selections for the driver and the passenger, you have two blend door actuators, otherwise just one. You also have a mode door actuator, a recirculating door actuator, and possibly a defrost door actuator.
10/15/2018 2:04:41 AM • 2005 Buick... • Answered on Oct 15, 2018
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