Chevrolet, Chevy, GMC, Jimmy, S10, Engine will not turn over when trying to start

Chevrolet, GMC, Jimmy, S10, Engine will not turn over when trying to start:

Simple diagnostic procedures to try when your engine will not turn over when trying to start.




1 Battery terminal connections loose or corroded. Check the cable terminals at the
battery; tighten cable clamp and/or clean off corrosion as necessary.

2 Battery discharged or faulty. If the cable ends are clean and tight on the battery posts,
turn the key to the On position and switch on the headlights or windshield wipers. If they
won't run, the battery is discharged.

3 Automatic transmission not engaged in park (P) or Neutral (N) or neutral safety switch
faulty. P) or Neutral (N) or neutral safety switch
faulty.

4 On manual transmissions, clutch pedal not depressed or clutch start switch rnalfunc-
tioningissions, clutch pedal not depressed or clutch start switch rnalfunc-
tioning

5 Broken, loose or disconnected wires in the starting circuit. Inspect all wires and con-
nectors at the battery, starter solenoid and ignition switch (on steering column). , loose or disconnected wires in the starting circuit. Inspect all wires and con-
nectors at the battery, starter solenoid and ignition switch (on steering column).

6 Starter motor pinion jammed in flywheel ring gear. If manual transmission, place transmission in gear and rock the vehicle to manually turn the engine. Remove starter and inspect pinion and flywheel at earliest convenience. ion jammed in flywheel ring gear. If manual transmission, place transmission in gear and rock the vehicle to manually turn the engine. Remove starter and inspect pinion and flywheel at earliest convenience.

7 Starter solenoid faulty

8 Starter motor faulty

9 Ignition switch faulty

10 Engine seized. Try to turn the crankshaft
with a large socket and breaker bar on the pulley bolt.