The battery cable for sure.
On a 1985 Chevy Caprice Classic, the starter is located on the passenger side of the engine, near the bottom where the engine and transmission meet. It is mounted to the bell housing and can be accessed from underneath the vehicle. To replace or service the starter, it's often necessary to remove the starter wires and the mounting bolts. Always ensure the battery is disconnected before attempting any work on the starter.
Look at the bottom rear of the engine
The starter on a 1991 Caprice 350 (5.7 liter) is located on the passenger side mounted to the bottom of the block near the rear of the engine and the front of the transmission.
Seized engine Discharged battery Loose or corroded battery cables Starter or starter solenoid Neutral safety switch
There is no maintenance schedule for replacing a timing chain. Timing chains are designed to last the life of the engine and are normally replaced during a complete engine rebuild.
Under the passenger side rear of the engine, just follow the positive battery cable from the battery, it will lead you right to the starter.
What is the trick for removing the starter, from the engine, I have the starter unbolted but has a small compartment that stops me removing it from the engine?
its on the passengerside just below the engine behind the exhaust. kinda hard to get too.
Try replacing your Oxygen sensors they are located on the catalytic converter. I had the same problem with my 94 Caprice and that turned out to be the problem.
Does the engine crank over?
Blow on it. If that doesn't work, turn the engine off.
The starter is accessed from below the engine. See "Related Questions" below for more details on replacing starters...