The smog pump for your 1989 Chevy Blazer is definitely not "only" a dealer
part. If you are capable and comfortable to do the installation of the smog
pump yourself, I would recommend you contact a local auto dismantler. You
can also call around local auto part stores to find the smog pump but more
then likely since the vehicle is older you'll need to special order the smog
pump and it will cost you more. Your best bet is a local junk yard which
carries Chevy Blazer parts. The smog pump and hoses for your Blazer should
not be hard to find.
If you do run into problems locating the smog pump you can always contact
the state's Hard-To-Find parts locator at (800) 622-7733.
