Notices
GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

Low Coolant Light... But There's Plenty of Coolant

Thread Tools
 
Search this Thread
 
Old 07-23-2007, 09:00 PM
  #1  
TECH Senior Member
Thread Starter
iTrader: (59)
 
Ferocity02's Avatar
 
Join Date: Apr 2003
Posts: 9,447
Likes: 0
Received 2 Likes on 2 Posts
Default Low Coolant Light... But There's Plenty of Coolant

Ever since I bought my truck I've had this problem. The low coolant light comes on sometimes but there is always plenty of coolant in the system. It pretty much only comes on when the truck is fully warmed up and when I've been sitting idling for more than a minute or two, like at a stop light. It only does it every now and then, like maybe every 30-40 miles I'm guessing. It eventually turns off. Could this just be a bad sensor? Anyone had this problem? Is the coolant level sensor in the resevoir or the radiator? Thanks!
Old 07-23-2007, 09:55 PM
  #2  
Piss Pumps for Sale
iTrader: (5)
 
Chevy Cowboy's Avatar
 
Join Date: Nov 2006
Location: Moncton, New Brunswick, Canada, The True North Strong and Free!
Posts: 2,685
Likes: 0
Received 1 Like on 1 Post
Default

Mine did it twice in the last 3-4 months, turned my truck off and started it back up both times and the light was gone, I also found this odd
Old 07-23-2007, 10:17 PM
  #3  
TECH Fanatic
iTrader: (5)
 
SBTork's Avatar
 
Join Date: Jul 2006
Location: LaCrosse, WI
Posts: 1,731
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Ferocity02
Ever since I bought my truck I've had this problem. The low coolant light comes on sometimes but there is always plenty of coolant in the system. It pretty much only comes on when the truck is fully warmed up and when I've been sitting idling for more than a minute or two, like at a stop light. It only does it every now and then, like maybe every 30-40 miles I'm guessing. It eventually turns off. Could this just be a bad sensor? Anyone had this problem? Is the coolant level sensor in the resevoir or the radiator? Thanks!
the sensor is in the reservoir, i beleive you can only get it with the tank. I've seen a few of these at the dealership
Old 07-24-2007, 02:46 PM
  #4  
TECH Addict
iTrader: (13)
 
Join Date: Aug 2005
Location: In the Sticks of Virginia
Posts: 2,267
Likes: 0
Received 0 Likes on 0 Posts
Default

tHE PART NUMBER YOU NEED IS 15203949, AND IT RUNS ABOUT $50 AT ANY DEALER. YOU DO HAVE TO BUY THE WHOLE TANK TO GET THE LEVEL PROBE. COMMON PROBLEM, SEE THIS ALOT.
Old 07-25-2007, 01:30 PM
  #5  
TECH Fanatic
iTrader: (4)
 
krambo's Avatar
 
Join Date: Jul 2005
Location: Bangor, PA
Posts: 1,609
Likes: 0
Received 2 Likes on 1 Post
Default

Mind does it as well. I spent maybe 3 hours total time on it to bleed out air. I am confident that it is the sensor in my case
Old 07-26-2007, 05:48 PM
  #6  
On The Tree
iTrader: (1)
 
ajt86's Avatar
 
Join Date: Feb 2007
Posts: 193
Likes: 0
Received 0 Likes on 0 Posts
Default

dex cool gets gunky over the years. they claim it to be 150,000 5 years but i would flish it every 2 years or 50,000 wichever comes first

ive replaced a few of these sensors over the years.
Old 07-26-2007, 05:52 PM
  #7  
TECH Fanatic
 
TexCrew's Avatar
 
Join Date: Feb 2006
Location: HOUSTON, TX
Posts: 1,171
Likes: 0
Received 0 Likes on 0 Posts
Default

yeah wifeys 01 tahoe does that sometimes too. she is also having issues with her fuel tank gauge. but i hear thats a normal chevy deal so..
Old 07-26-2007, 06:01 PM
  #8  
On The Tree
iTrader: (1)
 
ajt86's Avatar
 
Join Date: Feb 2007
Posts: 193
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by TexCrew
yeah wifeys 01 tahoe does that sometimes too. she is also having issues with her fuel tank gauge. but i hear thats a normal chevy deal so..
was her tahoe recalled? there is a recall for the fuel pump wire harness in the early 20xx trucks.
Old 07-27-2007, 07:10 AM
  #9  
TECH Addict
iTrader: (13)
 
Join Date: Aug 2005
Location: In the Sticks of Virginia
Posts: 2,267
Likes: 0
Received 0 Likes on 0 Posts
Default

There's no re-call on a faulty fuel guage.
Old 06-21-2016, 06:50 PM
  #10  
Staging Lane
 
mozmale's Avatar
 
Join Date: Apr 2010
Posts: 58
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Torque_Wrench
tHE PART NUMBER YOU NEED IS 15203949, AND IT RUNS ABOUT $50 AT ANY DEALER. YOU DO HAVE TO BUY THE WHOLE TANK TO GET THE LEVEL PROBE. COMMON PROBLEM, SEE THIS ALOT.
Do you see the Caps Lock on the left side of your keyboard?


Quick Reply: Low Coolant Light... But There's Plenty of Coolant



All times are GMT -5. The time now is 03:20 AM.