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  1. K

    air pump relay blows

    Thanks!!
  2. K

    air pump relay blows

    so, is there anyone who can walk me through testing the relay to see if it is bad? thanks
  3. K

    air pump relay blows

    Is it possible to walk me through how to check the relay? Also, I had the exact same issues on my 2007 trailblazer for many years before I sold it.
  4. K

    air pump relay blows

    I should also say, when I replaced the relay, there are no physical signs of wear on the contacts.
  5. K

    air pump relay blows

    the relay stops working, therefore the pump does not turn on, throwing a check engine light and code. It is the relay attached to the chassis, underneath the vehicle. Located in area of drivers side compartment. When the pump works, it sounds fine, and remains on for the required 5 seconds...
  6. K

    air pump relay blows

    Does anyone have an idea what is causing my air pump relay to blow every 3 to 6 months? (the one under driver seat on chassis frame) Have replaced it 5 times since I owned it, less than 2 years. I have a 2008 trailblazer L6. I have used NAPA brand, Omni brand, GM brand, makes no difference...
  7. K

    SOLVED! Loud roar , speed related.

    Thanks to all and the advice. Replaced the front left hub and problem solved!
  8. K

    SOLVED! Loud roar , speed related.

    well, I bought one hub, and if you had the choice, which would you replace? Planned on doing this tomorrow. All I know for sure is, sound lessens to almost nothing on turning steering wheel to left.
  9. K

    SOLVED! Loud roar , speed related.

    So even though it sounds like a fan clutch roar to me, it is probably the left wheel hub??
  10. K

    SOLVED! Loud roar , speed related.

    I have a 08 trailblazer, 4.2L 6. Upon driving I hear a very loud roar, that is speed related. When slowing and braking the noise "winds" down accordingly. I have replaced the fan clutch, and the emissions valves, solenoids, and air pump are all functioning as they should. I seem to notice...
  11. K

    Help with a p0411 code

    I have gone through this P0411 code numerous times. I now have it again for the 5th or 6th time, with my 08 trailblazer. I replaced the relay (under driver side chassis) and seemed to work well for a month or so, now again getting code. I can hear the air pump kick in occasionally. Is it...
  12. K

    Help with a p0411 code

    I have gone through this P0411 code numerous times. I now have it again for the 5th or 6th time, with my 08 trailblazer. I replaced the relay (under driver side chassis) and seemed to work well for a month or so, now again getting code. I can hear the air pump kick in occasionally. Is it...
  13. K

    P0411 P2432 codes

    Well, I thought I fixed everything related to secondary air pump issue. Ran fine with no lights or codes for 2 months. Now it started again. Had engine light emissions go off, same time lost my tach, and cruise control. I pulled over , restarted motor, and my tach and cruise came back. I...
  14. K

    wheel bearing noise

    Replacing my drivers side this weekend. Can someone tell me the size of the center axle nut used to hold on the bearing hub? Want to make sure I have one on hand. thanks
  15. K

    wheel bearing noise

    Thanks for the help guys. The right bearing was replaced about 2 years ago.
  16. K

    wheel bearing noise

    Think I finally figured out I have a bad wheel bearing , which is making for a loud noise , going straight. I can't remember for sure, but I believe you determine which bearing is bad in the front by putting it under load. If I turn the steering wheel to the right and the noise continues, but...
  17. K

    overdrive?

    The right front has been replaced. It really sounds like it's combustion related. Is it a big deal to take off the exhaust manifold heat shield to get a good look at the exhaust manifold ? I think this is where I am going with this.
  18. K

    overdrive?

    so you are talking about the actual exhaust header pipe off the block, cracking?? any place to look in particular? I would try some JB weld first, if that was the case, before replacing the actual pipe.
  19. K

    overdrive?

    I did check for exhaust leaks, and found none. I will change the filter and tranny fluid, since it is about due also. What I was thinking , and didn't check is maybe the exhaust manifold gasket has a small crack/ hole, between the header pipe and head. Sometimes hard to see, but that kind of...
  20. K

    overdrive?

    I can follow most of what you guys are saying. So I do the brake test and I'll see what happens. Any good in doing another fluid change? done about 40,000 Miles ago. Can anyone explain the loud engine rev noise? It is not the fan clutch, since I already had that problem and replaced...
  21. K

    overdrive?

    Have a 07 trailblazer, L6 motor. Does anyone know how to tell if their Overdrive is working or not? Sounds stupid, but the truck shifts through all 4 gears, but doesn't seem to go into overdrive gear. It appears the rpms are all correct at shifting intervals, but on acceleration the engine...
  22. K

    P0411 P2432 codes

    L6, 2007 trailblazer. Valve mounts to head is correct.
  23. K

    P0411 P2432 codes

    does anyone know, if the air check valve is opened on initial cold start up, or closed on start up? I would assume it is opened on start up, to allow air to flow from pump through to cat converter. If my system is giving codes like P0411, and P2432 (valve stuck open), then I assume it is...
  24. K

    P0411 P2432 codes

    yup, valve, pump, relay, all new, all GM.
  25. K

    P0411 P2432 codes

    yes, it's the valve above the exhaust, not throttle body. Tried everything that I could think of replacing. I was told the P2432 means the valve is stuck open? would that cause my loud engine noise especially on deceleration? If the valve is new, where would you check next, to make sure power...
  26. K

    P0411 P2432 codes

    -------------------------------------------------------------------------------- Anyone have advice with a persistant P0411 fault code? I have replaced the control valve (to throttle body), the pump, and relay. Everything worked well for 2 weeks, then it through the code again yesterday and...

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