1992 GMC Suburban Slow Warm-Up Thermostat Fix

GMC YUKON
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HAMPSTER
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  • 2 POSTS
I am installing a new thermostat in a 1992 GMC Suburban. There are 3 choices - 160, 180, 195 degrees. Which one should be used? I am changing it because I believe it is stuck open. It takes forever to heat up.
Jan 25, 2006 at 2:25 AM
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SC1 RACING
  • ✓Experienced Mechanic
  • 117 POSTS
i always go with the 195. but ive ran the 180 too. could not tell any differance in operating temp in summer, but in winter the 180 was to low. temp always stayed between 160-170 in the winter.
Jan 25, 2006 at 4:38 AM
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HAMPSTER
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Thanks for the info.
Jan 25, 2006 at 5:40 AM
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Suggested Repair

Install a 195-degree thermostat. An 180-degree unit can run too cool in winter (about 160-170°F), while 195 is the preferred choice for normal operating temperature.

Conversation Summary

The owner of a 1992 GMC Suburban asked whether to use a 160-, 180-, or 195-degree thermostat while replacing a unit believed to be stuck open and slow to warm up. The expert recommended the 195-degree thermostat, noting that an 180-degree unit ran too cool in winter with little difference in summer. The owner thanked the expert.

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