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Hi, I have a question regarding ball joint replacement on a 1999 Bravada. When I was driving home from work today, the upper ball joint on the front right side gave out and the tire caved inward. The car is at the mechanic now and he said he would replace the two worn (upper) ball joints on the front wheels for $500. But isn't it true that you should have BOTH the upper and lower repaired for each wheel that has an issue? In my case, the two front tires. So really it's a total of four ball joints for...

Please pardon the vanity, but having non-mechanical trouble with a 1999 Bravada and am trying to find a fix. A lot of GM vehicles from the late 90s and early 00s have a built-in anti-theft security system called Passlock or Passlock2. When a problem with this system occurs, you may not be able to start your car again for 30-60 minutes (the car's computer essentially thinks a thief is trying to steal the car). The cost to fix this problem is not exactly easy or cheap, so I figured I would ask if anyone else here has had a similar...