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62Cole, If you have the old core, take it to the parts house and compare before you buy. Even if the book says something will fit, enough time has gone by since our trucks were made that sometimes the books are not accurate. It is always a good idea to physically compare units when you can. This does not only apply to heater cores but most everything. Steve
First ...... Happy New Year!!!
Now to the issue... I had the same problem. I looked through different heater core books at the local parts store with no luck. Go to your local radiator shop. They can put a new core in your "frame" & use your inlet & outlet tubes. It did cost me $65 though. Good Luck!