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2000 Chevrolet Silverado 1500 LT 5.3L No Upshifts
Posted to GM Transmission on 10/9/2011 10 Replies

This truck came in with what the owner said was locked into 4Low. I can make the truck shift out of 4X4, but now the darn thing won't upshift. I can make it shift with the scan tool, but it will not on its own. The speedometer was pegged at max, but became un-...

10 Replies Received (View Replies)

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car Vehicle Data

2000 Chevrolet Silverado 1500 LT

VIN [No VIN Available]
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedNo Upshifts
ConditionsSpeedometer Was Stuck at Maximum, Then Dropped
Misc.Speedometer Was Stuck and Now Works
Message Closed

car Vehicle Data

2000 Chevrolet Silverado 1500 LT

VIN [No VIN Available]
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedNo Upshifts
ConditionsSpeedometer Was Stuck at Maximum, Then Dropped
Misc.Speedometer Was Stuck and Now Works