Do you need to know How To do something? We have provided a help section to aid and guide you through some of our products. Click on the appropriate .pdf guide document below as needed. More guides will be posted as they become available. The 82 GM Assembly and Shop Manual Indexes were created by and given to us from one of our customers. Note: The IAC test harness is no longer available, but we have left our IAC troubleshooting guide on the site for your convenience.