20 Most Recent 1999 Buick LeSabre Questions & Answers

Hi Joe Not easy. Tear down and check. https://www.google.com/search?q=1999+Buick+Lesabre+check+for+intake+manifold+coolant+leak ..

What a fabulous name you have :>) This is the full circuit https://www.2carpros.com/questions/buick-lesabre-1998-buick-lesabre-start-circuit More here https://www.google.com/search?q=1999+buick+lesabre+starter+relay+wiring+diagram ..

1 behind the battery, and opposite side of car.

It is really a job for a body shop. Thy can also stretch out bent metal. ..

Question edited for clarity. Question moved to model category. Hi Joe You have a new vehicle? Is it from the connector, or is the pipe rusty? Videos that should help.

unbolt mount from transmission while supporting with jack. Jack up slightly. Unbolt old mount from cross member. Replace in reverse order, do final tightening with jack removed. A few vehicles require the cross member to be removed from frame to access the lower bolts/nuts.

Have you tried testing anything right after it dies? Find out what's missing - spark, fuel pressure etc. Could be ignition module, crank sensor, etc. You need to find out what is missing then diagnose the system that failed.

No such thing exists........leaf screen is there to prevent leafs from entering. so how could they plug a drain that doesn't exist in the first place

Check the fuse marked "STOP"

The unlock code is on the back of the radio. Use an extension mirror to see it.Turn the radio to the on position and press the alphanumerical code in.

You've probably fixed it by this time, but I'll offer this: There's a microswitch in the ignition lock cylinder. When you insert the key, turn it & go past the run, to start position, the PassKey module wants to see the correct resistance from the pellet in your key. If it matches the pre-programmed value, it will complete the circuit of what is known as a "Wheatstone Bridge " in the module, and allow ignition, cranking & fuel systems to operate. If it doesn't see the correct value, it will shut down for like 5 minutes or something, then reset for the next try. The problem is, that after innumerable cyclings of the key, one of the the two wires will separate internally, disabling the system totally. The two wires exit the lower end of the steering column, & are a very shiny white, and orange in color. They terminate in a connector that can be disconnected. Do that. Then take a measurement between the two exposed wires in that little black pellet on your key, with an ohmmeter & obtain a resistor of the same value. Don't worry about the wattage value of the resistor....a 1/8 watt resistor will work just fine, as there is minimal current in the circuit. Insert the resistor into the two wires that go into the wiring harness (Not the two going up into the steering column). If the microswitch was at fault, your problem is now cured, although your PassKey system is now disabled. The upside is that you can now have spare keys made from the cheap blanks without the resistor in them. Good luck.

Here is a post that will give you an idea on how the system works and how to repair it. https://repairpal.com/car-wont-start-because-of-anti-theft-system-that-uses-raised-chip-key-033

1994-99 BUICK LESABRE
CHANGE OIL SOON Light
1. CHANGE OIL SOON light will come on when engine oil has broken down enough to require changing. After changing oil, reset oil life display.
2. To reset light, turn ignition on. Open glove box to access oil reset button. Press and hold oil reset button in glove box for at least 5 seconds, but not longer
than 60 seconds. The CHANGE OIL SOON light will flash 4 times to indicate light has been reset.

If it will not kick down then its a computer fault on the autobox computer but it could have a dirty connection in the engine loom as it has to sense the throttle pedal opening ,try cleaning all the connections and a spray with wd40 on any electrical pin connections

you may have a shorted starter solenoid, check for 12 volts at the solenoid on the starter...

I recently tried the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my jcb 3cx site-master. It would'nt move forward or reverse, engine was good both solenoids for forward and reverse worked, but still couldn't diagnose the problem. I don't have much technical knowledge but I just followed it step-wise, and now it works perfect! covers wiring, codes, diagrams, torque specs, PCV, everything got it from www.reliable-store.com

I would be inclined to check the engine to earth strap and battery earth as first before checking wires to alternator and starter motor.

Bad diodes are a common cause of alternator failure. The diodes are part of the rectifier assembly that converts the alternator's AC output to DC. The alternator's charging output flows through six diodes in the rectifier assembly before it goes to the battery and electrical system. Some may still be functional but will soon fail and the alternator will need replacing.

Have a qualified tech do diagnostic's on it ! 003 Fuel System Tests Scan Data Tests

It could be a wiring issue. Are you are using the correct bulb?