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What can be done to increase mileage on a 2001 gmc 4x4?

There are several things you can do to increase the mileage on your 2001 GMC 4x4:

1. Keep your tires properly inflated. Underinflated tires can increase rolling resistance and reduce fuel economy. Check your tire pressure regularly and inflate them to the recommended pressure, which can be found on the sidewall of the tire.

2. Avoid idling your engine. Idling your engine wastes gas and doesn't do anything to warm it up. If you're going to be stopped for more than a minute or two, turn off your engine.

3. Accelerate and decelerate gradually. Rapid acceleration and deceleration can waste gas. Try to accelerate and decelerate gradually, and avoid jackrabbit starts and stops.

4. Use cruise control on the highway. Cruise control can help you maintain a steady speed, which can improve fuel economy.

5. Keep your vehicle well-maintained. Regular maintenance, such as oil changes, tune-ups, and air filter replacements, can help keep your engine running efficiently and improve fuel economy.

6. Remove any unnecessary weight from your vehicle. Extra weight can weigh your vehicle down and reduce fuel economy. Remove any unnecessary items from your vehicle, such as cargo boxes or heavy tools.

7. Use a fuel-efficient driving technique. There are several fuel-efficient driving techniques that you can use to improve your mileage. These techniques include:

* Coasting to a stop instead of braking

* Shifting gears early

* Avoiding high speeds

* Driving in the right gear

* Avoiding rush hour traffic

8. Consider installing a performance chip. A performance chip can reprogram your engine's computer to improve fuel economy. However, be sure to do your research before installing a performance chip, as some chips can void your vehicle's warranty.