What is the biggest size wheel and tire combination that you can use on a 1992 GMC Sonoma SLE without doing modifications?

The largest wheel and tire combination that can typically fit on a 1992 GMC Sonoma SLE without modifications is 15-inch wheels paired with 31-inch tires. However, this can vary based on factors like the specific model, trim, and whether the vehicle has been lowered or lifted. It's always best to check for any potential rubbing issues and consider the vehicle's overall stance and handling. For precise fitment, consulting with a tire professional or using a fitment guide is recommended.