1995 Chevy Truck 1995 K1500 5.7 liter

Yes, the spark plugs could be a problem. Also, another problem could be the fuel injectors. Let's start with the spark plugs. If your spark plugs have a lot of carbon and dirt on them they wont produce a good spark resulting in a misfire. This can easily be fixed by either taking the spark plugs out and cleaning them or simply buying new ones. I would suggest buying new ones since they arent too expensive. If it's the fuel injectors, they are probably clogged or dirty as well. If they arent too badly clogged then you can fix that by adding fuel injector cleaner into your gas the next time you fill up. If they are badly clogged or damaged then you'll have to have new injectors put in.