Slow Shift When Cold Question ?

[Quadrasteer]

On an '02 Sierra Denali w/ 63k I'm starting to get a slow shift (hangs) out of first when the truck is cold. I've changed the fluid several times and refilled with M1 ATF. What usually causes this to happen? I have a GMPP so if it's anything bad I'd like it to be taken care of before the warranty runs out.

[black00chev]

Im sure it's just because the fluid is cold and takes an extra second to flow... I know when I was staying in PA that on the 45 and below mornings it would shift like it was in tow/haul mode for the first 1-2 shift then be fine after that.

[Quadrasteer]

It's never done it before and it's not cold outside. I've had other vehicles do this too, I just wondered if anyone knew why it happens and if it's serious enough to make the dealer repair it before my warranty expires.

[black00chev]

You could have them check but I don't know what it could be. Of course I don't know enough to get paid the big bucks either haha.

[Quadrasteer]

I'm wondreing if it could be a partially clogged filter.

[black00chev]

I'm wondreing if it could be a partially clogged filter.

 

I suppose you could always try a BG Trans flush and see if that cures it... I know those things can work wonders.