All times are UTC - 6 hours [ DST ]




Ask A Question Reply   
Author Message
 

contributions: 3
99 Sierra pickup has no heat.
I flushed the heater coil and have hot water both sides.
Fuse is ok.
Blower and control for vents, defrost works ok.
Turning the cold to hot control, temp stays the same, although it sounds like something is moving, but not certain what the noise may be.
Just for info, the instrument cluster needs to be replaced, but I can't see where that could be related.


   
Reply with quote  
* Search   
 
User avatar

contributions: 2275
Images: 37
Location: Oregon
you should take off the air temp door motor and see if you can change the temperature by moving the door manually.the motor could be bad, the door could be stuck or the door could be broken.


Attachments:
air temp door motor.jpg
air temp door motor.jpg [ 74.85 KiB | Viewed 1799 times ]
   
Reply with quote  
Ask A Question Reply   

   Similar Topics   Author   Replies   Views   Most Recent 
New Articles View the first Possible Sierra bad computer

in Chevy Silverado

stumped58

3

2180

Wed Mar 27, 2013 5:59 pm

Karl View the latest

New Articles View the first 99 GMC Sierra Won't Start

in GMC Trucks

MGF

2

2055

Mon Nov 07, 2016 10:04 pm

Rockroad View the latest

New Articles View the first 89 gmc sierra no power

in GMC Trucks

georgenikkichevytahoe

1

1909

Tue Mar 17, 2015 10:26 am

carriedi View the latest

New Articles View the first 2003 Sonoma No Heat

in GMC Trucks

only1jw

1

1920

Fri Oct 19, 2012 6:08 pm

ProTech View the latest

New Articles View the first Attachment(s) 2004 GMC Sierra Z71 5.3liter

in GMC Trucks

James7128

2

1667

Thu Apr 10, 2014 7:03 am

James7128 View the latest

New Articles View the first Attachment(s) GMC Sierra No brake lights

in GMC Trucks

dirtman

5

3385

Sat Apr 18, 2015 10:56 pm

carriedi View the latest

New Articles View the first GMC 2001 Sierra does not always start!

in GMC Trucks

rkcrump

1

1765

Wed Oct 19, 2016 10:54 pm

carriedi View the latest


All times are UTC - 6 hours [ DST ]



Search for:
Jump to:  
Contact Us