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.
Coolant Leak From Heater Core on Chevrolet S10
Average mileage: 151,419 (63,600–270,000)
56 people reported this problem
26 people shared problem details
need to replace heater core some have said this model you dont have to remove entire dash
1990 Chevrolet S10254,000Visitor
replaced heater core
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.
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.
1993 Chevrolet S10Visitor
2 dash mount screws on right lower, radio out for ease of core case screws,ease dash slightly out, plenty of room,under 2 hrs, easy, cetronia auto allentown pa
1995 Chevrolet S10132,000Visitor
The dex-coolant cause radiator, heather & cooling system ( water pump replaced ). It was a big mess & cost to fix. Sometime in 2008 there was a lawsuit, but I was to late to make claim, 10/28/2008. Also, every 2 years I have to repair & replace parts for it to pass smog inspection ( a problem since it was new ), no one seems to know how to fix it. I am the original owner. The fuel pump has also been a problem. The airbag light has is also on we no fix. Otherwise the truck drives great and we love it. It is fast & pulls jets or boat easy.
1995 Chevrolet S10100,000Visitor
It's a minor drip leak and tolerable, so I live with it. Detailed replacement video is on YouTube. Repair is too expensive and risky.
1992 Chevrolet S1063,600Visitor
replace heater core
1995 Chevrolet S10227,426Visitor
it has not been fixed yet but as soon as you poor in water or antifreeze, all of it just dumps out right in between the engine block and the transmission which leads me to believe it is the intake gasket or a blown out freeze plug.
1997 Chevrolet S10180,000Visitor
First off, I still haven't fixed the problem. The story is a warning. Started with a foggy passenger side window and only on the right. The thought of replacement was to replace the vehicle but before I was able to sell it, stepson used his car for "texting and missing a deer and then hitting a tree". Needs a car to get to work, you can use the truck 97 Chevy S-10 V-6. "Make sure you check the antifreeze cause it leaks", I warned him. He said there was no heat for a few days and then it overheated. Desperate, he added some window washer fluid to the radiator until he cud add some antifreeze. But it was already too late. During the overheating, the head gasket blew on top of the intake manifold. We bought a $45.00 bottle of sealer and it worked for 3 days before the head gasket blew at the cylinder because I now have white smoke coming from the exhaust.
1996 Chevrolet S10Visitor
Windows. Fog up
1997 Chevrolet S10130,000Visitor
Have not fixed yet. May try this weekend
2001 Chevrolet S1089,500Visitor
heater core leak
2003 Chevrolet S10140,000Visitor
Heater core began to fail causing the windshield to fog and the cab smell of antifreeze. Took to repair shop had heater core replaced.
1992 Chevrolet S10190,000Visitor
The water heater system has a leak in it. I unhooked it and haven't got it fixed yet. Money is currently tight
1997 Chevrolet S10147,386Visitor
how to connect to engine of motor
1991 Chevrolet S10174,000Visitor
Fogged cab and major leakage into passenger side
1991 Chevrolet S10135,000Visitor
leaking heater co
It start overheating. had to replace hoses. but heater core hasnt been. how do i get this recall taken care of
1995 Chevrolet S10246,768Visitor
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
how do i replace the heater core on my chevy s10 pick up
both side flshers work but at different flash rates
2002 S-10 ZR2 P/U. Just changed thermostat and refilled with new coolant. Bought this truck l...
Why would I not be able to get hot air from the heater when engine is at normal operating tempe...
No hot air, no coolant leaks, hoses seem ok, water hoses feel hot but no hot air. engine runs...