How to check mileage on gmc sierra?

To check mileage on GMC Sierra, watch: https://www.youtube.com/watch?v=zUx5rHzSMbs Having the fuel burn efficiently is the key to maximizing your miles per gallon. Your gas tank needs to be in the best shape. You will come into problems at some point. The gas cap can become stuck and will be quite a hassle to deal with. There could be gas leaks, which need to be looked into pronto. The gas tank can become loose. A faulty control valve may arise. Car parts will eventually become ineffective. The fuel filter needs to be changed every 30,000 miles. If it doesn't, you will come across problems with the performance.