Top 10 2002 Chevrolet TrailBlazer Questions & Answers

under the steering column, there are three or four little holes in the plastic covering. If you look inside, one of them (the one on the right side toward the dash) there is a brass pin inside. This is the pin to release the key. As far as the key not turning, I have had the same problem. The first time I replaced the ignition switch and that solved the problem. However, this makes no sense because the ignition switch has nothing to do with the tumbler being locked. GMC thinks that my anti theft system, which is inside the ignition cylinder is the problem. By removing the ignition switch, it reset the pass lock anti-theft system and temporarily fixed the problem. So, try removing the ignition switch and then plugging it back in. If that doesn't work, your in the same boat as I am, and we may both need new ignition cylinders.

Same thing happened to me on my 2002 trailblazer. The last few wraps of the cable was corroded to the point that it wouldn't unwind with the tool supplied. First thing to do is cut the crimped end of the cable off with a grinder or cut off wheel but don't forget to support the spare. This will get the spare out of your way then simply take out the 3 mounting bolts for the cable hoist. At this point you could buy a new cable hoist from the dealer and install it yourself or you might be able to do what I did. I managed to pull and remove about a foot of the rusted cable, slide the rectangular metal piece, that actually holds the spare at the center of the wheel, back on the cable and attach a 1/4" cable clamp to the end of the cable which of course must be in good condition. There should still be enough cable to re-attach your spare to it and hoist it back up. Don't forget to lube things up so it won't happen again. Good luck. (buying a new one sounds better, doesn't it?)
mikethemedic in Hawley,Pa.

it could be an o2 sensor. it could also just need a tune up

Assuming you have a 4.2L engine here is the location.


Hope this helps out,
if so please rate my answers.
Brett

I just had the same problem. I took the cover off, saw the white bulb base, twisted it to take it out, but it popped back inside the door. I got it out, but it wouldn't pull through, so I twisted it back in place and went to Autozone to get new bulb. Once I saw the new bulb, it was obvious, just the bulb itself pulls out. There's so little room to work, I couldn't get it with just my fingers - - maybe rubber gloves would have worked, but I used pliers, lightly, wiggled it a little and it popped right out. I had a similar issue once with the taillight bulb and had to break the bulb and then grip the remaining filament wires with pliers to get it out, so that was my backup plan, just in case.

Hope this helps others.

You need to check the cam phazer and see if it's damaged. Lots of the time it leaks oil into the connector and messes up the wires. Also I've seen the oil control screens come out of the phazer and go into the engine, which will also set the coeds. If I were you I'd pull the phazer out and see if all 3 of the oil control screens are there. My bet is one will be missing. Make sure to change the oil too. You may get lucky and it will have made it to the oil pan? Other wise I wouldn't worry too much about it. Most of the time it will not cause any engine problems. Good luck, oh and you do have to pull the power steering pump off to get the phazer out. But you can just take the bolts out for the pump and let it fall down so you can get the phazer out!

Hi, first, keep this diagram around as you will need it to route the serpentine belt when you reinstall it. There may also be a diagram under the hood by the radiator.
Next, follow this link and watch the video that shows you how to replace a serpentine belt...
http://www.wonderhowto.com/how-to/video/how-to-inspect-and-replace-your-car-s-serpentine-belt-267229/
Take care

• There was a Technical Service Bulletin concerning this.
  

• Bulletin No.: 03-08-52-002
  
• Date: March 27, 2003
  

• Technical - Subject:
  
• Remote Keyless Entry Inoperative (Reprogram Liftgate Module)
  

• Models:
  
• 2002-2003 Chevrolet TrailBlazer, TrailBlazer EXT
  
• 2002-2003 GMC Envoy, Envoy XL
  
• 2002-2003 Oldsmobile Bravada
  

• Condition
  
• Some customers may comment that the Remote Keyless Entry (RKE) is inoperative at times.
  

• Cause
  
• An anomaly has been identified with the software in the Liftgate Module (RKE functions). The Liftgate Module software is affected when the temperature is approximately 40°C (104°F).
  

• Correction
  
• Using normal SPS reprogramming procedures, reprogram the LGM Liftgate module. The information was released on TIS version 2.75 or newer broadcast in March 2003.
  

• There is a fuse block under the rear seat on the drivers side. Fuse # 3 and # ^ are the ones you will check for the Lift Gate.
• Often the problem can be in the harness going to the module.
• Sometimes the module needs replaced and then reprogrammed.
• Here is a copy of your owners manual for free http://www.extendedgmwarranty.com/owners-manual/chevrolet/2002-Chevrolet-TrailBlazer.pdf
• If you have any comments please feel free to leave them here.
  
• Hope this helps and thank you for using FixYa.
  

call locksmith or if you have paper work like title take to dealer and have a key made cheaper

There are two actuators that activate the 4WD components, one is for the Transfer case modes and the other is for the front axle disconnect. Both of these actuators make a distinctive noise (motor noise) when activated. First thing to do is with engine off and ignition on, switch from 2HI to 4HI and listen for two distinctive noises. If you hear both, more than likely the front spline disconnect assembly (at the front axle) is defective.
In order to troubleshoot the 4WD system, you need to have an understanding of the whole thing, it is not a DIY item.