"Angels Go Truckin" is a likable episode, with a not bad storyline as the later season episodes go.
I like seeing Kris and Tiffany together, but this was when (for me, at least) Cheryl Ladd's abrasiveness begins to surface. When Sabrina was still around, there was no question who was the leader, just as there was no question who was the show's best actress. Now, I like Kelly just as much as any Angel-lover, but let's face it, Jaclyn Smith was not a very good actress and she also probably was feeling disheartened when the forceful and charismatic Kate Jackson off the show. And I think Ladd saw this as her opportunity (or duty) to step up to the plate and take over as the strongest personality. Unfortunately, Ladd did not have the natural reserves of humor that Jackson did and without the humor, the show suffered. So, the more than competent Ladd became harsh and less likable than what she had started out as two years earlier.
Other than that, Joanne Linville is fun and engaging as always as the client; the guy Kris and Tiffany pick up, along with his contraband peaches, is VERY cute; and Kelly's hair looks awful, though Smith handles the Southern accent not too badly.