Top 20 2005 Buick LaCrosse Questions & Answers

Question edited for clarity.Question moved to model category.Question translated from Spanish to English. We are a North American website, we only speak English.https://translate.google.ca/?sl=auto&tl=en&text=2005%20Buick%20Lacrosse.%20Como%20puedo%20desactivar%20la%20alarma%20de%20un%20auto.&op=translateTo deactivate disconnect the battery.You can't deactivate / Bypass it. The system has two computers and a module stopping you trying what you are trying to do, drive the car without proper credentials. You have to fix it, not find away around it.Resetting the system1-Turn ON the ignition, with the engine OFF. 2-Attempt to start the engine, then release the key to ON (vehicle will not start). 3-Observe the SECURITY telltale(this is the security light), after approximately 10 minutes the telltale will turn OFF. 4-Turn OFF the ignition, and wait 5 seconds .Feb 11, 2018Theft deterrent is on and my 2005 buick lacrosse will not..https://www.youtube.com/watch?v=74AGNqY7Mm8

Not sure what you mean by 'Calibrate'? They get programmed. What you can do is have yours repaired. https://www.upfix.com/product/buick-lacrosse-2005-2009-bcm-body-control-module/ If there is something else wrong with it, the cheapest alternative is a mobile auto electrician. https://www.google.com/search?q=auto+electrician+near+me ..

no info genetic check climate controls get a meter and test the system to find problem

You may need to adjust the switch a little. It may be a little tight.

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 ..

test your brake light switch

Try any Buick dealer

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.

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

On the dash https://www.google.com/search?q=2005+buick+lacrosse+dash+warning+lights ..

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

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.

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 .

Camshaft position sensor

There is nothing unusual about this radiator, but replacing it can be messy. You need to drain the radiator using the valve at the bottom (may be hidden by an air deflector panel at the bottom front of the car), remove the cowling above the radiator, disconnect and remove the cooling fan(s), disconnect all hoses (and pipes if connected), then remove the retaining bolts in the bracket above the radiator. You can then pull the radiator up and out. If this is a radiator that includes an integrated engine and/or transmission oil cooler, you need to be aware that fluid will leak fluid from the disconnected pipes. Although the amount is usually small, you will need to check these fluid levels when you are done and top up if needed. Reverse this procedure with the new radiator and be very careful not to damage it. Be sure to use an "all types" antifreeze to avoid corrosion in future.

this link will show location and replacement proceedure How to replace PCV valve on GM 3 8L 6

It's called a ambient light sensor . The ambient light sensor is a light-sensitive transistor that varies its voltage signal to the body control module (BCM) in response to changes in the outside (ambient) light level If the technician didn't know if it would fix it or not , should have found a more knowledgeable tech. Hooking up a factor scan tool would have found a DTC - diagnostic trouble code in the BCM - body control module . DTC B2645 Ambient Light Circuit

Have you taken the vehicle any where an had diagnostic's run ? Given all the electronic's on your vehicle your problems could be caused by any number of thing's ! An guessing could cause you to just replace parts , an that's not the way to diagnose this . Hooking up a factory or professional scanner an test driving the vehicle while a qualified tech veiw's sensor data to see what is droping out would be the way to diagnose,could have a sensor shorted out internally ,but which one ? This would bring down the five volt ref. circuit in the PCM. Plus the starting system on your vehicle is computer controlled . The ignition switch is an input to the BCM -body control module , the BCM sends a crank message to the PCM - engine computer ,the PCM energizes the crank relay which sends B+ voltage to the S terminal on the starter solenoid . Your best bet , have a qualified repair shop check it out . You have no idea of the complexity of the electronic's on your vehicle. The starter staying engaged could be as simple as relay contacts sticking or as complicated as a BCM or ignition switch problem I know GM had their share of problems with both . This is out of GM service repair manual . Circuit Description (Key Start) When the ignition switch is placed in the Start position a discrete 12 volts signal is supplied to the body control module (BCM) notifying it that the ignition is in the Start position. The BCM then supplies a class 2 message to the engine control module (ECM) / powertrain control module (PCM) notifying it that CRANK has been requested. At the same time the BCM is supplying 12 volts for the IGN 1 Relay closing it and supplying battery positive voltage for the crank relay coil. The ECM/PCM verifies that the transmission is in Park or Neutral. If it is, the ECM/PCM grounds the control circuit of the CRANK Relay. When this occurs battery positive voltage is supplied through the switch side of the crank relay to the S terminal of the starter solenoid.

I would have the engine checked for a coolant leak that may have allowed the introduction of air into a closed system. how's the antifreeze level?

RFA / MOD fuse 10amp . location - insturment panel fuse box. Fuse Block - I/P Right side of the I/P, behind the access panel If the fuse is good your best bet would be to take it to a qualified repair shop , that doesn't mean the dealer . Lot of good independant repair shops around , just have to check the yellow pages. Do you know what DTC'S are ? diagnostic trouble codes ! Not only the ones for the engine management system OBD 2 . There are also DTC'S for the remote keyless entry system , BCM - body control module. You need a factory or professional scan tool to view this codes DTC B3101 DTC B3102 DTC B3103 DTC B3106 The remote control door lock receiver (RCDLR) communicates with the body control module (BCM) through the keyless entry serial data circuit. When any button on the keyless entry transmitter is pressed, the transmitter sends a signal to the RCDLR. The RCDLR sends a lock, unlock, or panic alarm request to the BCM, depending on which button is pressed on the transmitter. The BCM receives the message and performs the appropriate function. The BCM also uses the keyless entry serial data circuit in order to communicate with the RCDLR when programming transmitters. Do you know what serial data circuits are ? DTC B3101 Keyless Entry Data Link Circuit Range/Performance DTC B3102 Keyless Entry Data Link Circuit Low DTC B3103 Keyless Entry Data Link Circuit High DTC B3106 Keyless Entry Data Link Parity Error This is what the factory manual said as to the location of power steering fluid reservoir ! Not much help , you would do better googling it. The power steering fluid reservoir holds the power steering fluid and may be integral with the power steering pump or remotely located. The following locations are typical locations for the remote reservoir: • Mounted to the front of the dash panel • Mounted to the inner fender • Mounted to a bracket on the engine