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1993 GMC Sonoma dash heater guage

Tiny
JAMESD1939
  • MEMBER
  • 1993 GMC SONOMA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 103,000 MILES
The dash heater guage wont work, I have been told that it has a seperate dash coolant temp guage sensor, How do I find it? I replaced the engine coolant sensor, no help.
Wednesday, February 18th, 2009 AT 5:48 PM

2 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Should be a single wire sender in one of the cylinder heads down by the spark plugs. Ground out the single wire and the gauge should go to hot. If not the wiring or gauge is bad
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Wednesday, February 18th, 2009 AT 6:09 PM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Just use a piece of wire in the connector and touch it to the engine or any good ground. Be sure you only do this to the 1 wire connector, not the 2 wire
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Thursday, February 19th, 2009 AT 12:29 PM

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