RE: 91 S10 Blazer Heater Core Removal
tell homer (hahahaha) that he doesn't even need 2 get @ any of the bolts 4 the outside of the box, everything is done from inside the cab. if your truck has A/C it's a little more work, but don't worry, it's all relatively simple. if your truck does have A/C, i've personally found it easier to remove the dash bolts on the bottom right, lower middle & the torx screws accross the top (inside the defroster vents) to allow the dash 2 b pulled out a little. remember this is my own personal experience, and since the first core broke right where the pipes r connected to the core 'cause i gave it that little extra push 2 get it past the bottom of the dash the first time, i pulled the dash the second time & have had no problems with it again (it's been 4 1/2 yrs. since i've done it the second time, only 11 1/2 months between the first & second time-and let me tell u, Feb. really sucks 2 do your heater core...TWICE!). there's also an access panel inside the glove box 2 get @ the top screws. when u reinstall the dash, put the torx screws in first (this will allow u 2 line up the dash with the screw holes more easily.
no replacement for displacement (8p