PST book covers the electronic Cruise Control system used on GM vehicles and sold to other manufacturers. These system components were later integrated into the PCM, the testing is still very similar.
GM PST 19006.00-4A
Coverage: Cruise Control Systems - Electronic (K34 - K35)
This book is divided into 4 sections;
Section 1 explains how to use the Custom Cruise III and its built in limits
Section 2 explains component functions in the system, from stalk switches to the Cruise module and the correct orientation of vacuum check valves.
Section 3 covers how the system works and testing using the normal tools a mechanic should have such as a multi meter, preferably a digital multi meter, a circuit probe, and some jumper wires. It includes a schematic with voltage and resistance values.
Section 4 covers diagnostic procedures of the servo, cruise lever, VSS and column switches on the Y car. It includes procedures for using the Custom Cruise III Quick Checker essential dealer tools supplied by OTC, Kent Moore, and Specmo along with a diagnostic chart. And the required adapter cable for the P car line.
Product Service Training
These books are easy to understand, and applicable to a single subject. The book information is more in depth than even their own service manuals. The books include the original mechanic's notes and we strongly suggest that you read those notes with great care!
These books were never distributed outside of the manufacturers product service training channel.