Question about 1992 GMC Suburban
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Posted on Jan 02, 2017
Sounds like there may be an air pocket in the system.
Try 'burping' the system. If this still doesn't fix the problem, check the temperature of the heater core hoses (in and out) The inlet should be fairly cool, the other should be piping hot. If they're both cold; the heater core has an internal blockage.
Next, replace the thermostat with a winter (180-195 F) derivative.
Bleed the system accordingly, and keep me posted!
Posted on Nov 30, 2009
Testimonial: "Thanks. Very useful information, provided very quickly."
This site explains in great detail each trouble code.
Here's the other one.
Like I said,this site does an excellent job of explaining what's going on with your code.
Posted on Feb 17, 2010
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