So is it cranking over and won't fire, or do you turn the key and there is absolutely nothing?
Okay, sounds like your fuel pump went out or your coil or coil packs are bad. Check for spark. If you have spark, I would lean towards the fuel pump.
Looking for a Used Grand Cherokee in your area?
CarGurus has 73,843 nationwide Grand Cherokee listings starting at $800.
Search Jeep Grand Cherokee Questions
Jeep Grand Cherokee Experts
Related Models For Sale
Used Cars For Sale