Top 20 2004 Buick LeSabre Questions & Answers

Have you replaced the thermostat in the coolant system? This is the usual reason for an engine overheating.

Hope you can read diagram. The two orange wires are voltage to ddm. One of them, power window circuit breaker--30 amp. the other is fuse 7--10 amp drvmdl. Both hot all the time, use test light to check. The two wires, bottom left, are grounds, black wire with white tracer and black wire. If you suspect a ground problem, you could try a redundant ground, just a jumper wire that goes to clean metal spot.

Key locking mechanism is failing (cylinder mechanical action) - need to replace the assembly (see a locksmith or dealer)..

First thoughts is to check the voltage at the wiper motor. It the motor has power, the motor probably has failed. If there is no power at the motor, look for a short or some connection has come loose.

Follow the fuel vent line (comes from the fuel tank) to the engine,it will be on that line at the engine.

You will need to replace the headlight wiring harness to that light.

Does it have factory anti theft ?

Do static compression test, then cylinder leak down test

The blower motor control processor ! HVAC BLO fuse #2 30 amp -location ,rear fuse box . It is under the back seat . This is s different GM vehicle ,but still the same as your's. Chevy Trailblazer EXT Blower Motor Won Turn Off

If you can see & access the wire's I will go for the splice action. Get some new wire some zip tie's and wire nut's. And start reattaching the wire's look closely so you can match the color to color for example you don't want to attach a red wire to a green wire. After you're done use the zip tie's to snug the wire's out of the way of anything. This will do till you decide to take it to be repaired. Here's a photo of a wire nut in use.

Check the MAP sensor for accuracy as they can trigger a EGR code .

I had a 92 Lesabre and had the same trouble. My mechanic by passed the switch in the dash with a toggle switch. I used that till I got rid of the car but the blower would run full speed by doing that. Now in saying that the switch in the dash was automatic temperature control. Not sure if yours is that way.

It may be that the speedo cable has come loose at 1 end and will need to be tightened back up. Sorry but not sure where ends are attached on your car.

This is the image for the coil packs. The 3.1,3.4 engine has cylinders 1.3.5 on the back side of the engine. 3.8 have cylinders 1.3.5 on the front.

The solenoids are internal ! But if it were a solenoid problem the check engine light would come on . There are a lot of variables involved in the shifting of electroniclly controlled transmissions , it's all part of the engine management strategy programmed into the PCM - engine computer . I would take and have it checked before guessing about parts problems . A good qualified repair shop would hook up a professional grade diagnostic tool and road test the vehicle . With-in a few miles they would know for certain .

There's a label under the hood with that exact information. If all the freon has leaked out, you need to find the leak and repair it first. Then you have to use a vacuum pump for an hour to remove air that has entered the system. Then you add freon. 3 cans will do it, but use a pressure gauge to tell you when the system is full.

Could be a few thing's , you need to have it checked by a qualified repair shop .

Have u checked ur air filter. Check it. Turn ur car on and listen any hissing sound. If u do hear somthing find the noise and fix or replace the hose. Its called an air valve leak. I used to have a 1994 buick lesaber and i had the same problem. Let me know if it worked or not. Thank you.

Did you disconnect the battery negative cable for 5 minutes after the parts were replaced? If not do so then drive it at least 20 miles in varying conditions of idle cruise and so on. See if that helps the rough idle. also rerun the fault code test and see if any codes reappear, I have a feeling you did not fix the problem but just threw parts at it.

Does it have spark ,is there fuel , is there compression ? If you have to ask you should take it to a qualified repair shop !