20 Most Recent 2004 Buick LeSabre Custom Questions & Answers

Hi Danny,here's a video showing you how to replace your bulb.https://www.youtube.com/watch?v=F4QrgxH4YVc

Why you want change spark plugs wire .THIS IS LAST THING TO CHANGE.Change spark plugs I agree.

Yes I have done this before also clean pathway hole too they can get very clogged up.

R134a

Passenger side by the oil filter. under the car.

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Engine Oil Pressure Sensor , under the power steering fluid reservoir , three wires -Black , gray , tan / white .What problem are you having ?

If 5w30 is recommended, depending on the climate and temp where you live 10w30 will be fine.keep in mind that 10w30 is a little thicker so in cold climates it takes a little longer to get moving

the tire will say,should be 35psi look in glove box older cars had a sticker on lid inside

The sensor is inside the tank, it wears out. Mine is intermittent and I will likely have to pull the tank to replace it.

With the lights on auto, the dash will dim when the lights go on, based on the dimmer setting. If it's set low [wheel] they will be really dim. If it's light outside it will be hard to read. there are not many other causes other than a low battery or bad alternator.

Blower fan needs to be replaced. You can sometimes get it to start by tapping the cowling under the dash [center area] with a rubber mallet [while ignition on and fan set to high. This will likely only work until it 's shut off again and the motor still needs to be replaced. This only verifies that it is in fact a bad motor and not a bad switch or resistor. Replacement motors can be found on eBay and amazon for like $40.

The Buick LaSabre custom is a 3800, I think. Your speedometor may very well be correct! Take it out on the highway and time yourself between mile markers. Those cars are very fast; if you got a good tire balance you may be going faster than it feels since the car is smoother riding now.

You need to scan the codes. Most big-box auto parts stores will scan your codes for you, if you take your car in. Once you have the trouble code and description, come back and get help on diagnosing the cause of the trouble code.

Here are some possibilities you can test yourself. But if none of them resolve your issue, you may need to consult a professional mechanic. Jeff Armer seems to have supplied even more detail. Just how comfortable you are will such procedures may determine just when you choose to go to a professional mechanic. No Crank or Start: This could be due to a weak battery, corrosion on battery terminals, poor starter electrical connection, bad ground connection, or a faulty starter motor. You might want to check the wires to the starter. If the car starts and runs when you jump the starter from underneath, it could indicate an issue with the starter circuit. Key Won't Release: First, ensure your vehicle is in Park and that the steering wheel is not locked. If the key still doesn't turn, try using a spare key, as the original might be worn-out or bent. If the problem persists, you might need to consult a mechanic or replace the ignition switch. Another method to try is to turn the key to the start position, let it fall back to the run position and leave it sit for ten minutes. Cycle the key off and wait five seconds and it should start. The battery has to be fully charged for this to work. Won't Come Out of Park or Won't Read That It's in Park: This could be related to the vehicle's security system. Running a diagnostic check for codes with a scan tool of both the Powertrain control module/ecu and the Body control module could help identify if any codes are stored. The vehicle should crank over in park or neutral.

This will help; https://www.youtube.com/watch?v=FZnC1OakYn0

Take your Rainier out for a drive and see if the cruise control still works. If it does, the VSS is likely fine. If not, the VSS could be the culprit (Vehicle Speed Sensor). Cruise control also depends on throttle position. Ensure that the throttle body and related components are functioning properly. Examine the wiring going to and from the VSS. Look for any damaged or frayed wires. The most common reasons for cruise control malfunction are failed control modules, faulty sensors, or switch issues. While you've already replaced the brake switch module, it's essential to verify that it's functioning correctly. Additionally, check other control modules related to the cruise control system. While you've already replaced the brake switch module, there might be a separate cruise control module. Inspect this module for any signs of malfunction. Powertrain Control Module (PCM): The PCM monitors the signal circuits of the cruise control switches to determine when to capture and maintain the selected vehicle speed. It uses the throttle actuator control (TAC) module motor to control the vehicle speed. That would be something to check. Visually check cable connections and for corrosion. A multimeter can check the battery which can affect the PCM. Sometimes, disconnecting the battery to clear any fault codes can resolve cruise control issues. Possibly that might work even though you see no fault codes.

Have you checked your amplifier?