Top 20 2010 Buick LaCrosse CXL Questions & Answers

Normally accessed from the back shelf. It slides left or right to unlatch the cover. You may have LED bulbs in the unit, in which case the whole strip have to be replaced.https://www.google.com/search?q=2012+buick+lacrosse+third+brake+light+replacement..

It doesn't have one it uses a fuel pressure sensor that tell the ecm when to turn on the fuel pump

Check ALL of your fluids - Power Steering, Brake Reservoir and transmission. You could have a cooler line that is leaking. Does your AC still work? Is there a possibility that its from another vehicle? - Something like apartment complex parking? If no, look for drips off of components in your vehicle to isolate the source. You may need to wipe down the under carriage and start the car to see where the leak comes from. Use a flashlight to help find the drip(s).

Try inserting an "old" CD into your radio, just under the lip of the stuck CD...this can properly trigger the "eject" function on your CD player...Hope this works...

Check the rearview mirror. the antenna is wired into it.

Onstar uses the same antenna as the GPS. Its that stubby thing on the roof.

Did they use an original equipment cat from the dealer or an aftermarket one? Aftermarket cats can cause more problems than they fix. There very few that I will personally install. are they monitoring downstream O2 sensor data to see if the O2 sensor may be biased high? If the cat is doing its job the downstream O2 sensors will read a lower voltage. Tricking the vehicle into running rich or lean will cause this voltage to change ( unplugging a coil will cause the Downstream O2 to read high as the cat tries to burn off the extra fuel. Unplugging a fuel injector will cause the downstream O2 sensor to read low as extra air is being pushed thought the cats). Making sure the downstream O2 sensors are capable of switching should be part of the diagnostics. Are you sure they replace the right cat? There are 5 different engine options for this car. If you let me know what engine you have I can let you know what bank is bank 1. I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

go to autozone library

BAD RELAY OR TEMPETURE SWITCH.

171 and 174 are Lean mixture warnings from the exhaust oxygen sensors. 0506 is the idle air speed warning. Check for vacuum leaks.

If check engine light is on. Get it scanned to find the problem code. They will do this at any auto parts store for free, It may be a bad 02 sensor. Get it scanned. A vehicle can fail a state-mandated smog test because a bad, or faulty, oxygen sensor. remove the O2 sensor from the exhaust pipe ahead of the catalytic converter and look for a change in performance. Good-Day!

Likely a bad wheel speed sensor. Have the codes pulled and replace the appropriate sensor.

Tire/s have low pressure and needs additional air added u ntil the proper tire pressure on all 4 tires are within operating limits. This will also extend the tire life. Tire pressure is printed on tire sidewall.

its ok its just hot outside and the fan will run to cool off the motor ...

You may have faulty tire pressure monitor sensors in your tires. They can be damaged fairly easily. I would look into replacing them with used OEM parts.

That's completely 100% normal.

it a anti brake syatem

Question edited for clarity and spelling. Question moved to model category. Ideas in the link, but the easy way is to use the spare key. All cars come with 3 sets. Or an Auto Locksmith. https://www.google.com/search?q=buick+lacrosse+keys+locked+in+car ..

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.

Make sure that all the bulbs are the correct ones and have a good ground.