Chevrolet Blazer Starter Relay

02 Chev Trailblazer-ign Switch On Position The Rpm Gauge Fluctuates Up/dwn.key To Start Position ,starter Will Not Engage. Turn Ing Switch...

When Trying To Start, Starter Won't Disengage, Even When Key Is Off & Removed. Have To Disconnect Batt. Cable.replaced Ecm Then A Used Pcm....

I Am Thinking Due To The Problem I Having That Either My Start Is Bad Or Starter Relay Has Gone Out. Battery Is Fully Charged Go To Crank It...