Hi.
My problem is not listed;
99 sierra 2500 4x4 NBS 6.0l
after a hard stop ( like when someone slams on the brakes in front of you) , tranny feels like it's in overdrive and then after 5-10 seconds it finally comes to first. Last week it did it twice but only when cold.. today it did after a good hour of driving it.
Any pointers or advice would be great. Thx