1994 Chevrolet S10 Blazer Q&A
1994 Chevrolet S10 Blazer Question: Heater Core Replacement
How hard is it to replace the heater core for my 94 Blazer and what do i need to remove to get to it? - Visitor
this is a very difficult and time consuming project, you will have to remove most of the dashboard and the right front fender to get to the heater core, unless you have the time and handyness to do this i would suggest taking it to a mechanic. - hollander62292
It is a big pain in the behind. I don't know who designed the 94 Blazer but it seems that they deliberately made it to where you will have to take it to a mechanic to fix it. I replaced mine and you have to take off so much stuff, pull the dash out, prop it up with something to hold the dash up and you will bust your knuckles trying to get all the screws and bolts out. I put the core cover back on and just put one screw in to hold it on because there are a bunch of screws you have to take off. Cheapest estimate I could find was about $250 dollars to do it. - stonecoldsteele
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 tech...