Heater Core Replacement for 1976 GMC C35 square body without AC

This should be the same on all Chevy and GMC pickups from 73-87, and Blazers, Suburbans and crew cabs until 91, provided they came without A/C. The vast majority of Suburbans and Blazers made from the early 80’s on do have A/C however.

[@65f100352]

Just what I was looking forward to change the core in my 76 GMC c25. Straightforward and easy to follow. Thanks so much!

[@zmurray9499]

Clear, concise and easy to understand. You have a knack for instructional videos. Been working on my new square body for a couple months now.

[@fredc8346]

I don't say it too often, but you did a great job on this video.

[@terryhastings1553]

Great video. It made the job much easier!

[@lucasmartinez5329]

Thank you for the tips. I had a bad coolant smell in my truck but it would come and go. Great tutorial thanks again. God bless

[@joeculver6227]

Thank you, Fred.

[@creepycrawler43]

Great video man really helped me out

[@HomeTheatre101]

You really did good on this one! Super easy to follow and made it a breeze on my 75 C10!

[@kellyg8717]

Thanks for the great vid. Really like how you show and talk through every step of the removal.

[@joeculver6227]

Thank you. I hope it helped.

[@workingcountry1776]

Thanks dude! I didnt figure there was much to it but this confirmed I can do it in my driveway in winter if i can get a day in the 30s.....

[@yungchachi5982]

great video man, got er done in 15 minutes

[@joeculver6227]

Wow, way to go!

[@bradleykillingbeck3979]

Awesome video thank you for the step by step

[@berdader]

Thank you sir! It happened just like you said it would! 👍👍👍👍

[@mctavish6812]

Where did you get your new one

[@aldosaldana3445]

Does your dash have vents in it ? Any ductwork going to them?

[@joeculver6227]

No vents in my dash. To my knowledge, only trucks with A/C have dash vents.

[@andrewpate9157]

So I’m doing this to mine now and have the same issue with the new one being smaller. How did that work out for you? Any issues with the air being a lil cooler since some air is going around the smaller core?

[@joeculver6227]

I cut up some thick mud flaps layered together with rubber cement to fill in the spaces around the core. It seems to work well; the air coming out of the vent is always very hot.

[@andrewpate9157]

@@joeculver6227 cool thank you

[@meuhey]

does it trap air into the cooling system?

[@lightsonforsafety9656]

I don’t think so. It seems to start working 100% as soon as it’s topped off after being run just a minute or two.

[@MrOkrick]

Those nuts made of sheet metal are called PAL nuts..and don't over tighten them..or lose them..lol

[@ffarmchicken]

Stuff some foam in the gap.