1993 GMC Sonoma dash heater guage

1993 GMC SONOMA
103,000 MILES • 6 CYL • 2WD • AUTOMATIC
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JAMESD1939
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  • 1 POST
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.
Feb 18, 2009 at 9:48 AM
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2CARPRO JACK
  • ✓Experienced 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
Feb 18, 2009 at 10:09 AM
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2CARPRO JACK
  • ✓Experienced 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
Feb 19, 2009 at 4:29 AM
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