More on ECM / ECU Reprogramming

This info:
GENERAL MOTORS

BUICK, CADILLAC, CHEVROLET, GEO, GMC, HUMMER, OLDSMOBILE, & PONTIAC

Diagnostic Tool	Go to www.gmtechinfo.com or call 1-800-825-5886.
Training & Training Materials	Go to www.gmtechinfo.com or call 1-800-825-5886.
Service & Collision Information	Go to www.gmtechinfo.com or call 1-800-825-5886. Body and collision information is contained in the body manual and the collision manual.
Reprogramming Information	Go to www.gmtechinfo.com or call 1-800-825-5886.
I/M Information	Go to www.gmtechinfo.com or call 1-800-825-5886.
General Information	Go to www.gmtechinfo.com or call 1-800-825-5886.

was gathered from these sites:
http://www.iatn.net/nastf/oematrix.html
http://www.aa1car.com/tsb.htm
http://www.aa1car.com/scantoolhelp/