Sell it. Listen to your husband. Assuming you have the standard features, according to KBB.com, your car is worth around $4,000 - if you are diligent about to whom you market it, you could possibly net slightly more than that, since these trucks make excellent off road/backwoods service vehicles. If the only issues are age-related mechanical things but it otherwise runs well, you're in a good boat to make some cash.
Take the money from the sale, plus a reasonable amount more (depending on what kind of "new-to-you" you are looking for) and get something smaller, more fuel efficient, and more reliable.