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1988 GMC G3500 5.7L Excessive Emissions, Poor Fuel Economy
when I unplug egr valve my reading becomes nornal, and vacuum goes up at 15 inch of mercury
FIX posted 5/1/2000
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Message Closed
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| VIN | 2GDHG31K2J |
| Engine | 5.7 L / 8 cyl |
| Emissions | obdI |
| Symptoms | Excessive Emissions, Poor Fuel Economy |
| Occurs | Always |
| Misc. | Motorhome |
Message Closed
Vehicle Data
1988 GMC G3500
| VIN | 2GDHG31K2J |
| Engine | 5.7 L / 8 cyl |
| Emissions | obdI |
| Symptoms | Excessive Emissions, Poor Fuel Economy |
| Occurs | Always |
| Misc. | Motorhome |
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