Generally on these types S10's (Blazers, pick-ups) with the 4.3 I use a basic Craftsman spark plug socket and a 19mm wrench which fits on the top of the socket. It's not the fastest but it works. And yes I remove the left front tire and get it through the wheel well while on a lift or just with the left side up on a jack stand if no lift is available. You got that part right.
