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	 1999 GMC K3500 Sierra SL 5.7L Poor Fuel Economy 
		
		customer has a gmc k3500 cab and chasis with a dump bed and dual fuel tanks. customer states sometimes rear tank doesnt seem to empty all the way. my questions are as follows. a) how do i test the modules ability to activate the balance pump? i tried to jumper... 
                        
                            FIX posted 3/10/2006
                             
                 
                            
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| VIN | 1GDJK34R4X | 
| Engine | 5.7 L / 8 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | FI | 
| Emissions | OBD-II Compliant | 
| Symptoms | Poor Fuel Economy | 
| Misc. | Cab and Chasis | 
Message Closed w/FIX
            
            
 Vehicle Data
                1999 GMC K3500 Sierra SL
| VIN | 1GDJK34R4X | 
| Engine | 5.7 L / 8 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | FI | 
| Emissions | OBD-II Compliant | 
| Symptoms | Poor Fuel Economy | 
| Misc. | Cab and Chasis | 
                            
3 Replies Received
          3 Replies Received
          
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