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1999 GMC K3500 Sierra SL 5.7L Poor Fuel Economy
Posted to GM Driveability on 2/10/2006 3 Replies

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...

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  Related Documents & Media  1999 GMC K3500 Sierra SL

 
Message Closed w/FIX

car Vehicle Data

1999 GMC K3500 Sierra SL

VIN 1GDJK34R4X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Fuel Economy
Misc.Cab and Chasis
Message Closed w/FIX

car Vehicle Data

1999 GMC K3500 Sierra SL

VIN 1GDJK34R4X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Fuel Economy
Misc.Cab and Chasis