Bought the truck new in 1993 and it has proved reliable ever since. I now have 167,000 miles on it. This truck has the 4.3 engine. I wish GM could learn how to make a good set of front brakes because every GM car I have owned this one included is hard on the front brakes. The heater core had to be replaced in 2002. Serpentine belt pulley replaced in 2000. The major annoyance is the paint, as it continues to flake off. According to GM the primer is bad and won't allow the paint to adhere. Overall, though, this truck has been a good runner and very dependable.
I bought this truck when I first got my permit to fix up and have fun. Then, things went down hill and i ran out of money so i couldn't fix her. Now she's a woods-beater. Sonomas are the most reliable trucks you could ever own.
My work truck and family of 4(Plus 2 dogs inside before the cap)ride in this. Have 110000 now and replaced the alternator, fan belt, tires, two set of pads, muffler,inside control switch for a/c-heat etc., and the pass. window moter only goes half way up-down. All have been minor compared to other cars I've had. Exterior has been great and I would buy another again. I have the V6 which is great on power, but I would like to see the MPG be higher(20-22hwy) now.