Jump to content

AC and Power Steering Noises

ericag02

Recommended Posts

ericag02 Enthusiast

ericag02

Posted
Posted

So, I have two different oddities happening on my '04 Silverado.

 

First off, after driving for about 10 minutes, everytime I make a left turn I can hear an audible hiss in the cab. It sounds like when you have the truck in park, and turn the steering wheel all the way to the left until it stops...then you hear the power steering pump hiss.

 

Secondly, my truck has the Auto AC Climate Control, and it has been making some noise lately. I'm in Texas, so it's like living on the surface of the sun right now, and when I turn on the truck, the AC is set at 73, it figures out it's hot enough to boil an egg on the leather in the truck and sets the fans to high and puts it into Recir mode. However, lately the output from the vents has gone down (noticeably) and when in Recirc mode I can hear a new noise which sounds like clicking or something fluttering in the wind. Also, when at low speeds or parked in the garage, the air output from the Vents goes up about 10 degrees in a few seconds.

 

This is a "new" truck with all of the original parts, and only has 17,500 miles.

 

Any ideas on those noises? I plan on bringing it to my dealer tomorrow morning.

 

Thanks!

asepgrad98 Senior Enthusiast

asepgrad98

Posted
Posted

a leaf or some other debris may be hitting the blower motor fan.

 

It is normal for a truck with 134a refrigerant to have noticeably higher vent temps at idle.

ericag02 Enthusiast

ericag02

Posted
  • Author
Posted

Is it also normal to have, what sounds like, the engine fans kicked on high gear most of the time making the engine whine really loud when driving? I assume it's the fan kicked in, but I'm not sure.

 

The same thing used to happen in my '94 S-10 way back in the day; but it was only a now and then thing. It seems that this is happening more and more now; and usually when it is happening the AC isn't quite as cold.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • Erfar
      Oil Change

      By Erfar · Posted

      have you stuck with dealer oil changes since then? I made the same switch after getting tired of crawling around under the truck, but I’ve found some dealers are way better than others about getting you in quickly. Curious if yours has been good about scheduling or if you’ve had to look elsewhere for quicker turnaround.
    • cherryred21duramax
      Can anyone decode a VIN to determine if this truck has had emissions issues or a recall?

      By cherryred21duramax · Posted

      Thank you.   I am set on a 3.0 Duramax as my previous truck with a Ford Ecoboost had just as many, if not more, "common" issues.  Cam phasers, timing chain issues, 10-speed valve body and CDF drum, emissions issues, etc.  So I figured, why not get 2x the fuel mileage (these things got 27+mpg on every mixed city/highway test drive I put them through) and better towing capability with resale value to boot?   My minimum, shortest trip will be 50 miles 1-way and I regularly go out of state with a travel trailer.  I'm planning on using this for a marketing/event promotion business also, which would require regular towing of trailers for bands, DJs, sound and lighting gear, along with my personal camera gear for filming events.   Looked at other trucks in the $30k+ price range but the issues seem to be everywhere, plus too many with gaudy mods.  I'm literally sticking with RWD trucks because they tend to be actually used as trucks, vs. the 4x4 models I've seen with unsafe lifts, huge tires, and general mods that would affect reliability (I'm wondering if some of them were tuned, hence the aggressive throttle response and hard shifting).   So my goal is to find a stock, 3.0 with 1 or 2 owners, in good physical condition, and decently well maintained.  Can't seem to find that up here, everything in the $27-30k range has had multiple owners, smoke smell, issues, or body damage.  Or the ridiculously modified trucks with 80k miles for under $27k but lots of problems...
    • KARNUT
      OCI, not when but why?

      By KARNUT · Posted

      That’s pretty tough Grumpy. I reread the previous few posts. They all reference oil changes. Much like your last thread. In my humble opinion it keeps things interesting.
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      Engine Wear and ISO 4406   1.) Cold Starts. 2.) High Particle Count. 3.) Low operating temperature viscosity and high low temperature cranking viscosity. 4.) Depleted AW, Friction and Acid packages.  5.) High engine load.    https://me.caltexlubricants.com/en_me/home/learning/from-chevron/heavy-duty-diesel-vehicles-and-equipment/The-Importance-of-Clean-Engine-Oil-and-Its-Impact-on-Equipment-and-Business-Performance.html   High particle counts have five sources. 1.) They are manufactured within the engine. Both wear debris and amalgamation of degradation products and combustion driven soot (worse in GDI). 2.) They are ingested via intake air. Ever hear the best oil filter is a good air filter? 3.) They are entrained in the fuel. 4.) This one is insidious. They are introduced in 'fresh oil'. 5.) They are introduced during the oil change.   ISO 4406 is the test that measures and quantifies the combine effects of all of the above particle related issues. You can mitigate your way into multiples of engine life by being attentive to them all.    https://www.hyprofiltration.com/blog/is-new-oil-clean   (from the link above)    [Quote] What Is the Recommended ISO 4406 Cleanliness Code for New Oil?   A good upper limit for new oil cleanliness is 16/14/11 (ISO 4406). Typical new oil usually has ISO codes of 19/17/15 or worse, which is far too dirty for sensitive components. This can be a major cause of degradation and premature failure. [Close quote].     Source of graph: Machinery Lubrication (GM Study)  
    • Diamond817
      WTS: Pulsar LT 22451 GM Silverado/Sierra 5.3 & 6.2

      By Diamond817 · Posted

      Make me an offer!

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...