Your 1999 gmc sierra won't turn over the relays under the hood and battery are fine but you are not getting any signal to the starter What else should you check before sending it to the mechanic?

Answer 1

Here are some suggestions: Turn on the headlights then try to start it. Do they dim a lot? Have the battery load tested first, then take a look at battery cables and connections. Do you hear a click when you turn the key but the headlights stay bright? I would suspect the starter solenoid. On a 1999 you'll probably have to replace the whole starter. No click? Try starting it in neutral instead of park. If this works, it's probably a bad neutral safety switch. If not, it's still possible that it's bad. From there, I would either suspect the ignition switch or the neutral safety switch. It's possible to check for this by jumping from the large cable bolted to the starter solenoid to the small one, but you'll need to know the safe way to do this. Try starting in Neutral. You might have a bad neutral safety switch. You can also try moving the gearshift while you try to start. tryed moving safetyswitch still nothing is it possible its still bad