I bought 3 ignition modules cheap from a ebay seller. Turned out all 3 were junk, no start condition. Made a claim and got 3 new, 2 of those were the same (no start) and with 1 of them the engine started but it immediatly turned on the CEL. Made a new claim but the seller stopped answering my conversation. I finally got my money back from ebay, not the seller.
Lessons learned from that mistake I wanted to go with AC Delco when the fuel pump gave up in my 2001 GMC. So I bought an AC Delco fuel pump and thought I was safe. It gave up after about only 3-4 K miles. What I didnīt know when I bought the AC Delco pump was that there are several different AC Delco quality classes. Turned out that the pump I bought was a AC Delco Advantage which is a low price budget alternative. When talking about this on another forum most people recommended to stay away from the AC Delco Advantage series parts.
Donīt know if the ignition module for a 94 is avaliable in the AC Delco Advantage series but if it is you might want to choose something else.
http://www.acdelco.com/auto-parts/au...t.content.html
http://www.acdelco.com/auto-parts/ig...on-module.html