Help! 05 Envoy wont start. Replaced starter relay,ign sw.

[slapstick]

Hi all,

I'm having issues with my car. My 05 envoy was having intermittent starting issues for 3 months. I read on here that it could be the starter relay. I replaced that. Thought that fixed it. No dice! It started acting up again last week and taking the relay out and re-installing it didn't work this time. seems all week my wife couldn't start the car in the cool mornings but when i get home from work it would start just fine. I can't troubleshoot a problem that i cant replicate! ( Hard for wife to understand that!) now it wont start at all, i replaced the ignition switch and still didn't fix it. with the key in the run position and i bridge the starter solenoid it will turn the engine over but will not start. So recapping, new starter relay, new ignition switch, and starter will crank with screwdriver, no security lights flashing, and lights and windows work fine. What is the deal?

[slapstick]

I ended up changing out the main fuse box and that fixed it. but now its doing it again. any ideas? last 2 times its done it is when the car was warm so im thinking starter solenoid

[freddyboy61]

For any of us to be able to diagnose your problem, you need to clarify what you mean by "will not start". Does the starter spin? If not, then it sounds like you need to do some electrical investigation, since it spins when you jump the solenoid.