Mechanics

MODELS

2008 Hummer Other

2008 Other Hummer Models

while pulling heavy loads what causes an electronic transmission to down shift to 1st gear and prevents upshift?
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Shawnpat
January 15, 2009.



The throttle pressure needs to be readjusted, I don't think you can handle the operation operation, take it to a transmission shop they will do it for free.

Dr Loot
Feb 19, 2009.


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