20 Most Recent 2006 Buick LaCrosse Questions & Answers

Where can I find a detailed procedure for changing the heater core

Question edited for clarity and correct spelling of the maker. Question moved to model category. Nothing here leads me to think it has one! A/C is controlled by the BCM. https://www.google.com/search?q=2006+Buick+Lacrosse+remove+the+A%2FC+control+module ..

Question edited for clarity. Question moved to model category. A 'Smoke Test' at a garage. They disconnect a hose and attach a smoke generator and under light pressure the smoke escapes where the leak is. The test takes about 2 hours. Here are some other ideas

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.

Your Buick has a heater core o heat the air sent from the air conditioning unit before it is blown outwards. A malfunctioning heater core may cause the coolant to leak on the inside of the car, or It may even lead to smoke blowing out from the air vents. Replacing the heater core will solve the problem, and to do so, you require a socket wrench and a Philips head screwdriver. Thi process is straight forward, but it may take up to an hour to finish 1. Pop open the hood, lift it, and then disconnect the bettery by using a socket wrench 2. On the passenger side, unwind the four screws from the kick panel which is underneath the glove box 3. Disconnect and remove the kick panel 4. Open the glove box, remove all contents within, and then unmounts the whole glove box by removing the screws 5. Pull down the flange, and you can access the heater core. To open it up - remove the two bolts from heater core cover and lift it off 6. Disconnect the core's wiring harness, then remove the four screws that are holding it in by using a Philips head screwdriver. Now you can easily remove the lousy heater core 7. Install the new heater core, then - reconnect wiring, screws, heater core case, and finally, the bolts 8. Reattach the kick panel and then glove box, and you are done

Hi, I recommend you replace the low beam relay in the box under the hood. Relay #35 as marked below.

try this link: https://www.justanswer.com/buick/8ybux-buick-lacrosse-cx-remove-lock-cylinder.html

Look in the users manual

A partstore or locksmith can help. Or chek videos online. Dont go to adealer...theyl break somthin else

Transmitter ProgrammingImportant: All transmitters which are to be recognized by the remote control door lock receiver (RCDLR) must be programmed in a single programming sequence. If the system is placed in program mode it will erase all previously programmed transmitters upon the receipt of the programming signal from the first transmitter. Up to 4 transmitters can be programmed. Do not operate or program the transmitters in the vicinity of other vehicles that are in the keyless entry program mode. This prevents the programming of the transmitters to the incorrect vehicle.

1. Install a scan tool.
2. Use the scan tool in order to access programming: Vehicle Control System/Computer Integrating System/Module Setup/BCM/Program Key Fobs.
3. Press the START soft key on the scan tool. Important: The scan tool must stay connected until all of the transmitters are programmed.
   
4. Press and hold the LOCK button and the UNLOCK button simultaneously on one transmitter. After a delay of 5-10 seconds, the scan tool will indicate that the transmitter is programmed.
5. Repeat the previous step in order to program up to 4 transmitters.
6. Remove the scan tool.
7. Operate the transmitter functions in order to verify correct system operation.

Good luck

Your transmission is stuck in the so called limp mode to protect the transmission against further damage, take the car to a repair shop or dealer for further testing

How difficult is it to access the control valve? I didn't find it under the hood so I am assuming it will be under the dash. The fan is working good, and the car is coming up to temperature beautiful.

That means the anti theft system has disabled the starter

It's on the drivers side, Standing in front looking at the engine it is on the lower right corner, facing the engine/transmission.

How many miles are on the engine ?

No Start Diagnostic Basics EricTheCarGuy

Is this the fuse you pulled or a different fuse? I looked at info for automatic hvac on your vehicle. The fuse in the diagram shows to be a dedicated circuit, no splices on the wire circuit, goes to havc control module. It might be possible to use inline fuse off positive battery post. That way you could bypass the fuse block and the wiring circuit both, up to a point. You would need to leave pig-tail wire at the hvac control module to splice new wire. At the fuse block, just leave the fuse unplugged. The autostore sells inline fuse socket. You may not want to get into this, in this manner? Just a thought. Of course if the problem is the hvac control module itself or wire connector at the module, it won't work. I'm just thinking out loud.

try scanning the speeds at low speed 5-10 mph and ' check connector for water or corrosion if ok it is probably the sensor

I think you should go for manual first after that it would be easy for you to solve your problem. I had visited this site past 2 months before for my vehicle and find it quite helpful may be you will also get something useful here Buick Allure LaCrosse Workshop Service Repair Manual 2005 2006 2007 2008...

Here's the link and I'm sure you will get the solution of your problem Buick Allure LaCrosse Workshop Service Repair Manual 2005 2006 2007 2008...