20 Most Recent 2009 Buick Lucerne Questions & Answers

I imagine you checked the fuse.

It is built into a thermostat housing and is located under the throttle body. Just follow the upper hose and the hoses that go to the heater core. You can remove it without taking the exhaust crossover pipe off, but it makes it much easier if you do.

Your best bet , have it checked for DTC'S - diagnostic trouble codes first ! Electronic control modules involved ! Can't check with a OBD 2 code reader , need advanced scan tool . No codes , check B+ voltage and ground to the module . Power Seat Inoperative (With Memory A45) Memory Seat Feature Inoperative Circuit/System Description Battery voltage is supplied at all times to the memory seat module (MSM) from the MDL-MEM 10A fuse located in the rear fuse block. This voltage is used by the MSM for logic power and to supply battery reference voltage to the seat and lumbar adjuster switches. Battery positive voltage is also supplied at all times to the MSM from the PWR SEAT 25A circuit breaker. This voltage is connected to a power rail internal to the MSM and is used to drive the power seat motors, lumbar motors, and seat heater elements on vehicles equipped with heated seats. Each seat and lumbar adjuster motor is controlled by the MSM through 2 motor control circuits. The MSM connects all motor control circuits on the power rail to a common reference point whenever they are not in operation. This reference point is biased to approximately 2.5 volts. The MSM checks to see if the reference voltage is shorted to ground or battery before enabling any of the seat or lumbar motors. Circuit/System Description Reference voltage is supplied to the memory switch from the driver door module (DDM). When a memory switch is pressed, reference voltage is applied through the switch contacts, a series of resistors and thorough the memory switch signal circuit to the DDM. The door module then sends a serial data message to the memory seat module (MSM) indicating the memory recall request. The MSM then commands the appropriate seat motors to move to the pre-recorded seat positions stored in memory in response to the switch input.

Before changing the pump did you test for B+ voltage at the pump and check the ground circuit . Jump B+ voltage to see if it runs ? Does it have the heated washer system ? How about the washer relay , did you check it ? With the ignition in the ON position, accessory voltage is supplied through the 25A WPR fuse to the WIPER relay, the WIPER HI relay and the WSH relay that are all located in the under hood fuse block.

My Lesabre did that and I am not sure how my mechanic did it but he said it would cost an arm and leg to repair it so he hooked up a separate switch under the dash and everything worked after that. a seventy five dollar fix is better than three hundred. See if your mechanic has an idea. He said the off and on part of the automatic switch was not working but after he put an off and on switch in the line the climate control worked.

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The body control module controls the interior lights. Pulling the fuse for that will call all sorts of goofy problems Replace the BCM

Squeaking, grinding, bumping ?

Hi There.
you may have to check in the trunk for an inspection panel or remove the gas tank to get to the fuel pump.

Quick fix is remove the bulb. Real fix is check switch for failure, or could be shorted door switch. If yours has a delay in shutting off, could be bad relay.

Good luck,they don't sell needles,have to buy the whole speedometer.

You will have to remove tank to get water out,how did water get in?

Hi Gregory: 2 issues: 1) water getting in 2)Water not getting out. 1) Water is not supposed to get in so you need to track down the leak. Check rubber around trunk lid, rear window seal. 2) Trunk is not intended to contain water, even on a temporary basis, so drain holes are not normally installed. Fix the leak and you won't need to have drain holes. Cheerfuls

Check you owners manual. That will tell you.

You door locks are controlled by a computer - door module's How to test computer controlled door locks

vapor lock from sitting running and overheated fuel lines over hot engine.

If the car is not to far from your home, you can use an extensioncable to a recharger under the hood. You have to use a slow-recharger, that keeps your battery charged.

My Lesaber is up under the dash not far from the steering collum.

I just helped change one and the instructions were in the car manul that came with the car. It't too complicated to expain by posting.