2002 gmc envoy problems

Check starter or ignition relays

The engine doesn't spin when you turn the key to start ? No click -no nothing . Check the starter relay in the under hood fuse / relay box . Security light lit on the instrument cluster ? Do you know what a relay is ? videos on youtube . How to voltage drop test starter motor circuit

Could be the neutral safety switch if it won't crank in neutral or park, could also be the starter has failed.

Lots of possibilities, but based on the information you've given, the most likely scenario is that the battery voltage has dropped too low to engage the starter. It may still be strong enough to turn on dash lights, interior lights or even headlights, but those draw far less power than the starter. That is assuming it is not 'turning over' based on you saying it will not start. If it turns over (cranks the engine) normally, but still will not start, then that is different. The gear shift on most vehicles will move if you have the key turned to the on position, but I cannot be positive about a 2004 Envoy, so that part seems a bit odd. The steering wheel should be unlocked when the key is in the on position, so that part is normal. If it is a battery problem, that could have been caused by some other issue (failed alternator, for example), or could have been as simple as lights being left on. I hope that helps.

Hi,
Will it start with a boost? If yes, the battery is suspect. There may be enough power for lights and gauges, but not enough to engage the starter motor.

On a 2002 Envoy you turn the key to run but don't start it. Then push and release the gas pedal 3 times within 5 seconds. The change engine oil light should blink for 5 seconds meaning you have reset the system. If it doesn't blink for you do the procedure again.

check fuses... get a 12v test light & see if getting voltage to starter. did you charge battery? check battery connections. did you spill water one cup? 500 gallons?in console? on engine? on ignition switch?

try car to car boost-battery charger may not be working correctly or set on low amp charge -interior lights and dash may all light but battery may not be strong enough to energize starter have battery tested if battery good than check for power to the starter if power-- starter may be shot can remove also and have tested at most auto stores free if no power battery -wiring-or connection issue would need to test fuse panel-ignition switch and starter solenoid

It could be a few different things. Do you hear a clicking during turn over? Its most likely your starter motor. After time the magnets wear down, and the bendix gear will not extend out to your fly wheel. Its actually a very common problem. I hope thats it, becouse it gets more expensive after that. If you have the knowledge to pull the starter out yourself, which is pretty ez, you can take it to a auto parts store, and they will test it for free.

If your 2002 gmc envoy or sierra will not even turn over with a kown good battery try starting it in nuetral then go back to park and try starting again. There is a park nuetral safety switch that can malfunction. Turn the key on then shift into nuetral, then turn fully to start.