Problem Reports
Chevrolet S10
Report: Heater Core Under Right Side of Dashboard May Leak Engine Coolant
Chevrolet S10 Problem
Model Years Affected: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2001
Average Mileage: 165,783 mi (63,600 mi - 270,000 mi)
The heater core under the right side of the dashboard may leak engine coolant which can puddle on the passenger front floor. The loss of coolant may cause an engine overheating condition. Our technicians tell us that removal of the dash board is necessary to replace the heater on these vehicles.
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Visitor, 1990 Chevrolet S10, 254,000 mi
replaced heater core
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Visitor, 1992 Chevrolet S10, 63,600 mi
replace heater core
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DRDietrich, 1999 Chevrolet S10, 165,000 miEnthusiast
I had this too, had to pull out dash and change out heater core, about two days work, plus every time the heater was turned on it smelled like antifreeze inside the cab, that lasted more than a year.
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Visitor, 1995 Chevrolet S10, 246,768 mi
lot of miles for a while though the guy who sold it to me took a piss in it. now found that my heatercore has fail
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Visitor, 1995 Chevrolet S10
Floor always puddles up witch makex my truck stink and idk what to do to fix it
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jimothy, 1990 Chevrolet S10, 140,250 miRookie
Radiator core sprung a leak and fogged up the cab. I was able to limp it back home and spent two days to replace it.
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Enthusiast
Found heater core had been leaking after dashboard was removed for V8 engine swap. A rust hole in the fire-wall half a foot long was underneath the heater core hoses and mounting location. A fiberglass and sheet metal patch was fashioned over top of the rust hole.
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jaden, 1996 Chevrolet S10, 128,000 miEnthusiast
heater core leaking repair shop est. 1100-1300 2wd with ac. part under 90.00 cost is full day labor ripping apart all of dash, electrical, and steering column.
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Visitor, 1997 Chevrolet S10, 94,000 mi
My Heater core failed about 2 years back while I had the truck in Denver. Fogged up the whole cab and cost about $600 to replace; they have to take the dashboard out.
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DJs10, 1991 Chevrolet S10, 175,000 miRookie
Antifreeze is leaking from the passenger side into my floor. I haven't determined the location or exact fix yet.
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