At the dealer ship and have your vin code handy,because the guy in parts department can trace it down that way
K3500 is a pickup truck; G3500 is a van.
The GMC Cutaway is a van from their light-duty commercial lineup meant for businesses and shipping. It's able to haul up to 12,000 pounds and is spacious on the inside.
Under the drivers seat
There is no "standard" rear axle as most cutaway E-350s were used for ambulances, service trucks.... Look on the drivers door jamb for the axle code, then do a search for it (ford axle e3). My E-350 cutaway has an E3 axle with a 4.30 ratio.
Under the drivers seat
The curb weight for a 2008 Chevrolet G3500 1 ton extended cargo van is 5,465 pounds. This van has a V-8 engine.
I have a 48 Gallon tank behind the axle on my 1987 cutaway/ Moterhome. It measures 34x24x13 . This is on a E-350.
1994 is 55 gals
My suggestion is to take van to autozone and they will pull the trouble code out of memory for free. Then you can go from there.
I have a 2000 Chevrolet Express G3500 cargo van and the fuel tank capacity is 119 litres. I believe that equates to just over 31 gallons.
The General Motors Company Safari Van was made from 1985 to 2005. The GMC Safari shared its platform with its sibling the GMC Astro van, which was very similar.
The GMC 2500 Van is usually used as a work van. The Van does not column with rear seating, nor rear side windows.