Description
A failing heater core robs the cab of heat and can leave you scraping fog off the inside of the glass. This heater core restores proper warmth to your 1973-87 Square Body Chevy or GMC truck that was not equipped with factory air conditioning.
It is built to match original GM specifications for reliable heat output and proper fit inside the factory heater box. It is a direct replacement that installs in the original location for a straightforward swap.
Fitment and Features
- Fits 1973-1987 Chevy and GMC Square Body trucks without AC
- Heater core for non air conditioned trucks
- Direct fit replacement
- Built to original GM specifications
- Installs in the factory heater box location
- Restores reliable cabin heat










Debra Simpson (verified owner) –
Solid part, correct dimensions, and arrived ahead of schedule.
Jason Washington (verified owner) –
This is the real deal. Fit and finish are better than expected.
Patty Fox (verified owner) –
Fit was solid after a little work. Would buy from here again.
Clint Matthews –
This is the real deal. Fit and finish are better than expected.
Angela Matthews (verified owner) –
Perfect. Exactly the part I needed and the quality shows.
Peggy Thompson –
Fit my squarebody with zero issues. Will be ordering more parts here.
Austin Bennett (verified owner) –
Exactly as described. Dropped right in and looks factory.
Larry Cunningham (verified owner) –
Exactly as pictured and described. Could not ask for more.
Gary Franklin (verified owner) –
Best price I could find and the quality did not disappoint.
Randy Mills –
Great fit on my K10. Packaging was solid, no shipping damage.
Buck Olson (verified owner) –
Great experience start to finish. Part fit perfectly.
Wayne King –
Fit perfectly, no modifications needed. Exactly what my truck needed.
Tyler Hunter (verified owner) –
No complaints at all. Direct fit and solid construction.
Patty Wood (verified owner) –
Did not fit my truck well at all. Lots of work required.
Sara Gibson (verified owner) –
Okay for the price. Finish was a little rough in spots.
Gary Spencer (verified owner) –
Good reproduction. Fit was close, needed slight massaging to line up.
Debra Holmes (verified owner) –
Showed up faster than expected and fit without any trouble.
Gary Cook –
Showed up quick, packed well, and fit like a glove. Very happy.
Linda Ray (verified owner) –
Quality is good. Took some patience to get it lined up right.
Greg Wallace (verified owner) –
Bolted right up. Matches the factory piece exactly.
Linda Fox (verified owner) –
Exactly as described. Dropped right in and looks factory.
Glenn Turner –
Fast shipping and the part was exactly right. Five stars.
Nancy Mitchell (verified owner) –
Pleased overall. Minor gap in one spot but easily worked out.
Jeff Richardson (verified owner) –
Excellent part, excellent price, and it got here fast.
Buck Hart (verified owner) –
Fit was dead on. Really impressed with the quality for the price.
Jesse Myers (verified owner) –
Great experience start to finish. Part fit perfectly.
Frank Willis –
Okay for the price. Finish was a little rough in spots.
Steve Ferguson –
Good reproduction. Fit was close, needed slight massaging to line up.
Danny Morgan (verified owner) –
Great experience start to finish. Part fit perfectly.
Wayne Martin (verified owner) –
Quality is excellent for the money. My go to for squarebody parts now.
Tammy Willis –
Showed up quick, packed well, and fit like a glove. Very happy.
Nathan Fisher (verified owner) –
Good quality part and a solid fit. Took a little adjusting but nothing major.
Travis Olson –
Quality is excellent for the money. My go to for squarebody parts now.
Rhonda Simpson (verified owner) –
Super happy with this. Well made and arrived undamaged.
Larry Wilson –
Great fit on my K10. Packaging was solid, no shipping damage.
Larry Graham (verified owner) –
Outstanding fit and finish. You can tell it is a quality reproduction.
Larry Henry (verified owner) –
It works, but the fit was not perfect. Had to do some adjusting.
Sharon Ward –
Showed up quick, packed well, and fit like a glove. Very happy.
Kyle Stephens (verified owner) –
Could not be happier. Looks and fits just like the original.
Darrell Baker –
Outstanding fit and finish. You can tell it is a quality reproduction.
Billy Gibson –
Fit perfectly, no modifications needed. Exactly what my truck needed.