emperature gauge keeps bouncing around

1996 CHEVROLET SILVERADO
14,900 MILES
Avatar
RIDAO
  • MEMBER
  • 1 POST
The Temperature gauge on my 1996 silverado keeps bouncing around from all the way hot to normal operating range. When this first started I filled the radiator with coolant, Temp gauge keeps bouncing from all the way hot to normal operating range. When this first started I changed the thermostat, that did not fix the problem.

I went to the local parts store to get a temperature sending unit, but they said that there was not one listed for a 1996 silverado 5.7 four wheel drive. Where is the temperature sending unit located on this vehicle?
Jan 26, 2012 at 10:43 PM
Advertisement
Avatar
WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
It shares a temp sensor with the computer. It sounds like there is air in the system, probably due to a leak but could be a blown head gasket also.
Jan 26, 2012 at 11:22 PM
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Try checking the coolant temperature sensor-On left cylinder head, near No. 1 spark plug.
Jan 26, 2012 at 11:26 PM
Avatar
WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
Ras is right. there is a separate sender for the gauge in the side of that head and check the connection of the wire to the sender, engine vibration can make it short.
Jan 26, 2012 at 11:36 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.