2006 Buick LaCrosse CXS - Answered Questions & Fixed issues

Gag's?

I can tell you how instrument cluster works, but, I can't diagnose it from here. The sending unit for any gage sends signal to pcm, the pcm then sends serial data to the instrument cluster to control gages. Some of the gages will default to zero if the pcm detects problem with sending unit or wiring, or the instrument cluster detects a problem with serial data from pcm. Check for applicable trouble codes, see if codes point in any particular direction. Some of the national brand auto stores will check codes for free, if there are any. You can check voltage and ground for instrument cluster, just to make sure that is ok. I can't rule out the instrument cluster, itself.

chances are the wire connection from the unit to the car has broken.

IF you are referring to the purge valve for the coolant it is located on the thermostat housing or near it...

firing order written on intake manifold

Sounds like the purge solenoid is leaking

The P0496 DTC code is a generic code which applies to all vehicle makes. A quick search on the 'net shows that this code seems to be more common with GM (Chevy, Pontiac, etc.) vehicles. In Acura, Honda, Hyundai, Kia, and Mazda vehicles, this code is described "EVAP system high purge flow" which is the same thing.try use maxiscan us703 to clear the fault code.

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.

anti siphon should stop before tank but can cause back splash and slow fill

The battery inside of the remote for your car could be low and needs to be replaced.

You will need to call a locksmith that can open up the doors on vehicles and specializes in opening up car doors.

Hello. To 'bleed' your Buick's coolant system, open the 'bleeder valve' then start engine. Let engine 'warm' to operating temperature. Add coolant/water to reservoir tank if needed as system 'bleeds'. As coolant 'bleeds', 'forcefully' out of 'bleeder valve'; close and tighten it AND keep coolant/water level at FULL/HOT. Good luck and keep me informed; if you want to.

Question edited for clarity. Everything here is FREE Jesse! Here is a tip I wrote. It is called burping the cooling system. Basically, you just take the radiator cap off, turn the heating on full and keep topping the radiator up as the temperature comes up to normal. It must be done from the radiator cap and not the expansion tank. There are lots of videos on YouTube. https://www.fixya.com/cars/r26222313-engine_overheating_even_after_changed These are videos specific to your vehicle. https://www.google.com/search?q=buick+lacrosse+replace+coolant ..

https://ibb.co/b172TKR 3.8l engine, in the picture, front, down low. #10 in picture is starter.

Please follow this link to find the 2006 Buick Lacrosse's belt diagram: https://galvinconanstuart.blogspot.com/2019/04/2005-buick-lacrosse-belt-diagram.html

Evaporative Emission System Flow During Non-Purge https://www.autocodes.com/p0496_buick.html

check wires an plugs also

GM part number 13503401