Today I just bought a 94 k1500 with a sliping trans, accually it doesnt slip its just not going into all the gears.(shift selinoid?) I'm not sure yet of the type of tranny, I think its a 4L60-e but some one said probley it was a 700r.Its a 4x4. looked in the search engine a couldnt find any previous threads and thought someone else has had this issue and would like to share.Also can a 2500 series tranny swap work (4L85-e), It has a better torq rating for more hp.