Top 10 2002 Buick Rendezvous Questions & Answers

Our 2002 did the same thing. Easy cheap fix! Pull the wheel off and check the wiring that goes to the wheel sensor. You will find after removing a few inches of wrap, a broken wire or two. This could be on either wheel, so check both. Fix the wires back up and you are good to go. Hope this helps!

To get the alternator out, I had to move that large electical fuse / relay box out of the way,and remove washer bottle and battery. then use a 3/8" drive ratchet to move the tensioner forward to get the belt off. I used a small mirrow to get a view of the back bolts on the alternator and removed them.[ I used meteric # 15 open end & closed end combo wench. Keep turning the back bolts until the alternator become loose.]

The O2 sersor will require a special socket to avoid damaging the wiring on the new unit. (the old one really doesn't matter so any socket that works can be used on it)
The first thing to do is spray a thread release agent like PB Blaster® around the threads. You should do it for several days between driving.
Call the auto parts stores to find one that has loaner tools. They will require a deposit until the socket is returned. It will look something like the picture. Yes you will need a socket wrench too.
WORKING UNDERNEATH THE VEHICLE, MAKE SURE ITS BLOCK UP SO IT CAN NOT FALL.
Some more information to consider from a forum

"You might want to take the O2 sensor you just replaced back and get two new ones. Some times new O2 sensors are defective, also when replaceing them I found it better to replace all of them at the same time for sometimes when replaceing only one the computer sometimes sends back false codes. Another thing is if you buy an after market O2 sensor the wires are just a little bit longer and can cause the computer to send back false codes. The best O2 sensors that I have found are the Boch Platinums designed for your vehicle."

2002 Rendevouz? Yeah, it's in the owner's manual. Pages 6-62 through 6-67.

If you need another copy (PDF version), go here.

Hello, I work for a GM dealer in Texas. I have seen this issue a couple of times, on your model and several times on the Trail Blazer. That vehicle has a cassette type ignition switch, that have had some issues. It can lose one leg of the switch intermittently and cause several things to go nuts. I just looked on our service site and there are no bulletins related to the issue. If you know a tech at a dealership, have him scan the vehicle for codes and send them to me. Also ask him to check the power mode operation on the scanner, It will let you know for sure if it is a ignition switch.The switch is easy to change and costs about $35 so it is not going to break the bank. Electrical problems are difficult to diagnose at best but really hard not being there to do the testing. If you can give me any codes/ power mode info I will be better able to help you. Good Luck

Below is the diagram you requested. Kindly return to rate this solution and thank you for using Fixya!
Greg

This code is for your Coolant Thermostat - It's detected that the Coolant Temperature is below the Thermostat Regulating Temperature

This code may mean one or more of the following has occurred:

• Low engine coolant level
• Leaking or stuck open thermostat
• Cooling fan running too much
• Faulty coolant temperature sensor (ECT)
• Faulty intake air temperature sensor (IAT)

Check the following to see if it resolves your problem:

• verify coolant strength and level
• verify cooling fan operation and replace if necessary
  
• verify ECT sensor operation and replace if necessary
• verify IAT sensor operation and replace if necessary
• if all above checks out, replace the thermostat
  

with the key on and the wiper switch in the low or high position tap the wiper motor with a screwdriver handle. If it starts working replace the wiper motor.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

The security light is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM. (Theft Deterrent Module) The TDM is what tells your computer that the correct key is being used and that it is "OK" to allow the vehicle to start and run. These 3 parts must be in CONSTANT communication. If the key is in the ignition, then these parts are sending important signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, (normally due to a failing/broken part) the car goes into antitheft mode. The car misinterperates this and thinks its being stolen or hotwired because it is NOT getting that signal from YOUR specific key. There is where the security light turns on and shuts down your vehicle. So basically, if that light is on, your system has some sort of failing part. This can start as an intermittent "no start", to your vehicle not running for days at a time, to the vehicle NEVER starting again. The problem is electrical and computer based, so don't count on an easy reset button, or the problem fixing itself. The hard part is isolating which part is the problem. You can spend a thousand dollars through a mechanic very easily. I have had great luck with bypassing the entire system. This way the problem will never return. It actually CAN'T ever return because it is eliminated. This can also be done yourself at a much cheaper cost. Read through this link very carefully. You'll find alot of information and pictures, along with ways to help you fix this.



http://vatspasslockpasskeysecurityhelp.yolasite.com/

Make sure your battery is fully charged. Turn key on until dash lights come on and leave in the on position for 15 minutes. After 15 minutes try and start vehicle. If still no start repeat process again. If still no start you will have to have system reprogrammed by dealer