I own a 2001 GMC Sonoma SLS, 2.2L 5spd Reg. Cab with the short-Stepside bed. It's a great little truck, a bit on the small side if you're a bigger person, (I'm 6'3", 280lbs) but I still seem to fit in there alright. It handles pretty well in town and it's easy to park because of its size, but when you're traveling at high speeds or going down windy roads, you can tell it's a light truck. Repair bills aren't usually too steep because the Sonoma shares parts with the Blazer, Jimmy and S-10 so getting cheap parts is easy. All and all, it's a pretty good little truck.
Good MPG (I get 20 city - 25 highway) Easy to park. Ease of finding replacement parts. Fun to drive. Good head room. Lots of power-jacks in the cab. Great heater and A/C
Make fuel tube to the tank wider. I have to basically let fuel trickle into the tank whenever I fill up. Remote locking doors would be nice. Electric windows would be nicer.
Owned mine 5 yrs & very happy with it. SLS, standard cab (2 seats), 5-speed manual trans., 2.2L 4-cyl., stereo with single CD, manual door locks and manual windows. 19-22 mpg city, 24.0- 25.6 mpg hwy; range about 350-360 miles/tank. Rides better with a load in the bed. Very reliable. Interior gauges easy to see. Daytime running lights & it switches automatically to night headlamps, very useful. Comfortable. Perfectly engineered for its purpose. Good looking exterior. I added a soft tonneau, then a cap when I could afford, which helped gas mileage 1-2 mpg. Great visibility without cap, limited but acceptable with cap. Small bump in bed where gas tank is, not a big deal. Good turning radius.
Engineering, reliability, gas mileage for non-hybrid, enough power, good interior, 3 power outlets, mpg, value for the money, ground clearance, affordable, can run on E-85 gas.
Remove carpet from driver side floor or increase size of floormats (I bought larger aftermarket mats to cover hole in carpet made by tennis shoes); include door lock for tailgate; add rubber liner to spare tire holder - mine rusted & stuck to the wheel.