No guessing can be done here. You need to disconnect the battery and have it towed. This could be an electrical fire which will destroy your truck very quickly. Here is a link to find a shop near you.
https://repairpal.com/repair-shops
Alex
RepairPal Certified shops can diagnose and repair your 1997 GMC Sonoma. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.