Trans Wont Shift Cold

By 62handler
March 7, 2009 in Ask A GM Technician

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62handler

Posted March 7, 2009

2001 silverado 5.3 4spd auto,

Truck sticks in second gear when its cold (below freezing) wont shift untill you hit about 3500rpm and let off.

stills happens when i let the truck warm up before i leave.

Usually only hapens the first time through the gears, after that it fine

I've heard of this as a feature to warm up the cat in other cars but never heard of it in a chevy, and i dont remeber it happening last year, trans fluid looks/smells good, dont know when it was changed last though, i've only owned it for about 15kmi, has 108k on it now.

thanks for any help

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