With the 5.7 engine, group size 34/78 800 CCA.
Most likely 3/8 Allen for caliper this truck.
Most are 35 gallon
When you go to buy a battery they can tell you the correct size.
26R
The group size is 58
The GMC Vandura 3500, typically used as a full-size van, has a payload capacity that can vary based on the specific model year and configuration. Generally, it can carry around 2,000 to 3,000 pounds of cargo, depending on factors like the engine and equipment options. For precise specifications, it's best to consult the owner's manual or manufacturer guidelines for the specific model year in question.
The 1986 GMC Vandura 3500 typically came with a variety of engine options, including a 5.7-liter (350 cubic inch) V8 and a 7.4-liter (454 cubic inch) V8. The specific motor installed could vary based on the configuration and options chosen at the time of purchase. It's always best to check the vehicle's documentation or specifications for the exact engine details.
My 93' vandura has a 5.7 liter 350cubic inch engine.
Anyplace that sells batteries can tell you the correct size you need.
Anyplace that sells batteries can tell you the correct size. Take the old battery with you as you will have to trade it in or you will pay a core charge.
.all I can say is my '92 2500 vandura has a 350 in and it does the job...don't know if all of 'em are the same size or not dt
3500