Last post on Aug 24, 2013 at 4:55 AM
You are in the Chevrolet TrailBlazer
What is this discussion about?
Chevrolet TrailBlazer, SUV
Go to NHTSA to file a safety complaint.
Or call Monday-Friday (8 am to 8 pm ET) (888) 327-4236 TTY: (800)424-9153
#630 of 665 Re: leak in extreme front end [sooner14]
by MrShift@Edmunds HOST
May 22, 2011 (7:26 am)
This is probably not a big ticket item to repair and very risky to just try and monitor. If it's just a loose fitting or cracked line I'd step up and get it fixed. And sure, the fluid level should be checked and topped off right away.
Yes, we say transmission "fluid" not transmission coolant, even though the fluid, while a lubricant, does also take heat away from the transmission.
#631 of 665 2006 Fuel Guage Issue
Jun 19, 2011 (6:35 am)
I have a 2006 Trailblazer with about 50,000 miles. When I fill the tank my fuel gauge immediately drops to 0, I get a low fuel light and diagnostic code PO463 (Fuel Level Sensor Circuit High Input).
The vehicle no longer starts by just turning and releasing the ignition switch as it normally would - I have to hold the ignition switch until it starts. After the code is gone this works as normal.
After burning off about about 20% of the fuel everything turns to normal and works fine (may have spurts of erratically jumping around down to the 20% mark). In doing research it is clear that there is a major issue with bad sending units. GM dealer also said in some cases a component in the dashboard causes similar issues and has been warranted. They want to charge me $60-120 to diagnose the issue.
If someone smarter than I can help me isolate the issue to the sending unit with some degree of certainty I will drop the tank and replace myself. I can't fix something in the dash so if I can't be comfortable I will have to go the dealer route. I'd like to save myself the diagnostic dollars but don't wish to go through the effort of replacing a sending unit if it might be something else. Any help would be greatly appreciated!
#632 of 665 Re: 2006 Fuel Guage Issue [rhuberty]
Jun 21, 2011 (10:55 am)
Could you please email me your VIN? I would like to look further into your situation.
Caron, GM Customer Service
#633 of 665 Re: 2006 Fuel Guage Issue [rhuberty]
Jun 22, 2011 (2:38 am)
I have a 2006 that also did this at around 30K. Our level sending unit has completely gone bad and the dealer wants betwen 800 to 1000 to fix the issue and was not covered under our regular warranty for some reason. Anyway, we have been living with the issue instead of repairing it by keeping track on the odometer....probably not the best way to do it, but works for now. Although ours does not work, the "auto ignition" feature still works just fine. The only other thing that ours does is that since the level sending unit is shot, the check engine light comes on sporadically.
You are correct that GM has an issue here and they have been aware of it for some time, yet no corrective action has been taken on the matter. You are not alone my friend and this will be the last chevy that I will buy as ours has been plauged with other issues. We may have just got a lemon.
#634 of 665 Re: 2006 Fuel Guage Issue [mathewsnell]
Jun 22, 2011 (5:40 am)
"was not covered under our regular warranty for some reason". Can you explain that a little further? Was the warranty expired due to time? This part is certainly covered under the factory warranty.
#635 of 665 Re: 2006 Fuel Guage Issue [mathewsnell]
Jun 22, 2011 (8:48 am)
If you're mechanically inclined, I'd replace the whole fuel pump which includes the sending unit yourself. Not that difficult to drop the tank with the help of a buddy. The sending unit itself is around a $100, and the entire pump assembly is around $200, but the sending level sensor is attached to the pump, so I'd replace the whole thing since you're in there anyway. Rockauto.com has both in stock for these prices. Also, if you aren't having the no start issues like the other person is, check out the tiny stepper motor on the back of the guage itself. Very cheap and easy to replace, can get on e-bay and is a common failure for TB's and Envoys.
#636 of 665 Re: 2006 Fuel Guage Issue [rhuberty]
Jun 23, 2011 (4:18 pm)
GM Customer Service posting was a dead end for me.
I'm still open to suggestions. Again, I'm hoping someone with some degree of certainty can help me isolate this to the sending unit. My feeling is that this is the issue but based on a short discussion with a GM service advisor I was left with some doubt after he stating there have been similar issue related to ECM. Vehicle is just off the full mark now and everything is working fine. I hit a full tank and all hell breaks loose.
#637 of 665 Re: 2002 Trail Blazer EXT Vibration "BAD" [wacky174]
Jul 12, 2011 (5:57 am)
Did you ever resolve this problem? I have an '04 Trailblazer with a vibration that I noticed after having a new set of tires put on. I've had the tires rebalanced, tires and wheels checked, and air pressure lowered. Similarly the repair shop doesn't seem to notice the vibration, and I am missing the smooth ride my TB used to have.
#638 of 665 Re: 2002 Trail Blazer EXT Vibration "BAD" [mari123]
Jul 13, 2011 (8:25 am)
I would check your wheel bearings. I had one go bad and had a bad vibration coming from the front left wheel. You can check this by simply jacking up the car at the wheel, place your hands at 10 & 2 and push on the tire. If there is any deflection or if the tire moves, you may have a bad bearing.