View Full Version : how to get codes from diagnostics?

05-11-2010, 02:42 AM
i have a 91 buick riviera, i can't find any port for my computer code reader. Where and how do i get the codes. I have no spark at the plugs, and service engine light is on.:confused:

05-11-2010, 04:47 PM
Hello firetheft,

You'll find the information you're looking for in Chapter 6 of our manual (#38031).