2006 envoy wont start

[Meenach]

My daughters envoy wouldn't away at school. Had tow service jump start she let it run for hour then shut it off until next morning, wouldn't not start again.
I go try jump start it no luck, replace battery , still wont start can hear buzzing noise tap on starter a little noise quits. then it will start. replaced starter still wont start had shop replace switch then it starts. next morning wont start.
two days later warmer outside will start, next day wont start.

Have replaced Battery , starter , Ign switch, and relay cube in the fuse box.
any suggestion ?

Frustrated college father:

 

[Drew78]

My daughters envoy wouldn't away at school. Had tow service jump start she let it run for hour then shut it off until next morning, wouldn't not start again.
I go try jump start it no luck, replace battery , still wont start can hear buzzing noise tap on starter a little noise quits. then it will start. replaced starter still wont start had shop replace switch then it starts. next morning wont start.
two days later warmer outside will start, next day wont start.

Have replaced Battery , starter , Ign switch, and relay cube in the fuse box.
any suggestion ?

Frustrated college father:

Have you fixed this issue? I had same issue...check ur battery connections..i know it sounds dumb..but even though connected tight..make sure its on straight..the side connections barely have enough wire to reach it straight..make sure it is..

 

[Swampfox21]

Check the cables from the battery to their respective connection points, especially on the ground side. May feel tight but remove the connections, clean them and their mounting points and reconnect ,tight (Especially the Ground side).

I have also seen where cables look and test good with a VOA meter but could not handle a load due to the fact they were corroded internally.

One thing I have learned about modern cars is that GROUNDS are as important an any other wire.

 

[dahntrmn17]

My daughters envoy wouldn't away at school. Had tow service jump start she let it run for hour then shut it off until next morning, wouldn't not start again.
I go try jump start it no luck, replace battery , still wont start can hear buzzing noise tap on starter a little noise quits. then it will start. replaced starter still wont start had shop replace switch then it starts. next morning wont start.
two days later warmer outside will start, next day wont start.

Have replaced Battery , starter , Ign switch, and relay cube in the fuse box.
any suggestion ?

Frustrated college father:

My daughters envoy wouldn't away at school. Had tow service jump start she let it run for hour then shut it off until next morning, wouldn't not start again.
I go try jump start it no luck, replace battery , still wont start can hear buzzing noise tap on starter a little noise quits. then it will start. replaced starter still wont start had shop replace switch then it starts. next morning wont start.
two days later warmer outside will start, next day wont start.

Have replaced Battery , starter , Ign switch, and relay cube in the fuse box.
any suggestion ?

Frustrated college father:

I know this prolly sounds dumb, but check the wire harness for rear hatch door under rubber boot by hinges. Might have broken wires there? I saw it in a video on youtube once.