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Several Problems 04 Sierra

hivoltg

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hivoltg Enthusiast

hivoltg

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I have an 04 Sierra Z71 and am experiencing a few issues. I've found the fix for a few items by searching but am wondering if the are all related.

 

1. I'm having the same speedometer issues as a lot of people here have had. I have under 70,000 miles on my truck so I assume the dealer will replace the instrument cluster for free?

 

2. My check engine light is on. When you plug a scanner into the port under the dash, the scanner acts as if it were never plugged in to the port. I thought that this would mean a defective scanner, but it was the same with 2 different units. What should I start looking for to fix this?

 

3.. One of the buttons on the left side of my steering wheel no longer lights up. All of the other radio controls on the wheel light up, except the 2 that are furthest to the left.

 

4. When I first start the truck on cold days, there is a humming noise coming from the little speaker looking thing in my ceiling. It is right above my head and close to the door. I have no idea what this is or what it's for, except to drive me nuts!

 

Other than these issues, which all started around the same time (the reason I think they might be connected in some way), I love my truck. I just want it to be as good as it was when I got it. The only other issue I've ever had is my check engine light has come on 3 times in the past. It has always been a loose gas cap. I reset the check engine light and all would be good for a few months. Do I need to replace my gas cap or what?

 

Also, was there ever a permanent fix found for the knocking steering wheel? I've had my steering shaft replaced once while the truck was still under warranty, but don't want to spend the coin on another temporary fix.

 

Sorry for all the questions but I've got to get some of these issues taken care of. I feel like my truck is falling apart on me!

 

Thanks for the help in advance

VOLT

superjim Senior Enthusiast

superjim

Posted
Posted
I have an 04 Sierra Z71 and am experiencing a few issues. I've found the fix for a few items by searching but am wondering if the are all related.

 

 

4. When I first start the truck on cold days, there is a humming noise coming from the little speaker looking thing in my ceiling. It is right above my head and close to the door. I have no idea what this is or what it's for, except to drive me nuts!

 

Sorry for all the questions but I've got to get some of these issues taken care of. I feel like my truck is falling apart on me!

 

Thanks for the help in advance

VOLT

 

 

The... "speaker looking thing"... is actually a little FAN.

It is part of the climate control system. It draws air over a temperature sensor.

You may be able to reposition it and stop the noise or it may just need to be replaced.

hivoltg Enthusiast

hivoltg

Posted
  • Author
Posted
The... "speaker looking thing"... is actually a little FAN.

It is part of the climate control system. It draws air over a temperature sensor.

You may be able to reposition it and stop the noise or it may just need to be replaced.

 

Thanks for the info. Now that you say that, it sounds like a little fan. Is it suppoesed to be loud enough to hear? Maybe it can be cleaned? I assume the cover just pops out if you pull on it, or is there a secret to getting to the fan?

 

thanks

hivoltg Enthusiast

hivoltg

Posted
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Can anyone help me out here please? :lol:

 

 

As for the OBD11 port not working, check your cregrette lighter fuse. It powers the OBD11 port.

 

Don

 

 

 

Don-

Thanks for the info. My cigarette lighter isn't working either! I didn't notice it until you said something and I went outside and checked it. Thanks a ton!

 

VOLT

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