OK, no injector pulse is usually a bad crank or cam sensor GM uses input from both. You should be able to use that SO tool to see all 3 and tell which is sending the bad signal.
The 3.4 has 2 crank sensors and one cam. The cam sensor is mounted where the distributor used to be. The cranks sensors are split. One is up front by the crank pulley the other is mid block and reads the crank ring. They are Crank A and Crank B on most scan tools.
Wednesday, January 25th, 2017 AT 9:20 PM