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2003 GMC Sierra 1500 SLE 4.8L Poor Fuel Economy
Truck is driven 70 miles/day on low traffic highway. Speed,fuel brand, and tire size change bring no effect. 9 mpg best economy. No codes, fuel trim near zero. 1st dealer said tires and water in fuel. 2nd dealer said fuel pump and changed it. Unknown web site ...
Summary posted 10/17/2003
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Related Documents & Media | VIN | 1GTGC13U63 |
| Engine | 4.8 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Fuel Economy |
| Occurs | Always |
| Misc. | 3.73 Gear 285/16 Tires |
Message Closed w/Summary
Vehicle Data
2003 GMC Sierra 1500 SLE
| VIN | 1GTGC13U63 |
| Engine | 4.8 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Fuel Economy |
| Occurs | Always |
| Misc. | 3.73 Gear 285/16 Tires |
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