2003 Silverado motor replaced
I have a 2003 Silverado that I just replaced the 5.3
motor on i drove it home from work and it ran great
no issues the next day I went to drive it to work and
once it warmed up it stopped shifting almost like
the tranny went out but I have had no issues with it I
had to call a tow truck and when he arrived he
drove it up the flat bed with out a problem once I
got to work the mechanic there checked it out but
we can't figure out what the problem is it drives fine
until it warms up any ideas what it could be?
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