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International Automotive Technicians Network
1991 GMC K2500 Sierra SLE 5.7L Transmission
Posted to GM Transmission on 6/21/2012 4 Replies

Hello fellow Techs, This customer runs a weed spray service out of his truck. While he sprays he puts the truck in 4 lo. While he is in 4 lo the transmission will not up shift. We replace the input and output speed sensors, but did not fix the problem. Is ther...

4 Replies Received (View Replies)

  Related Documents & Media  1991 GMC K2500 Sierra SLE

 
Message Closed w/FIX

car Vehicle Data

1991 GMC K2500 Sierra SLE

VIN 2GTGK29KSM
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection
AffectedTransmission
ConditionsWill Not Upshift in 4Lo
Message Closed w/FIX

car Vehicle Data

1991 GMC K2500 Sierra SLE

VIN 2GTGK29KSM
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection
AffectedTransmission
ConditionsWill Not Upshift in 4Lo