05 sierra 1500 won't start

[UncleBbq732]

I have a 2005 Sierra 1500 S. L, EI have replaced a starter. The ignition housing assembly initiation switch ignition cylinder all fuses and relays are good battery has power.i reset the anti theft pass lock thing.truck still won't start can anyone give me some ideas please 

[CamGTP]

Does it do anything when you turn the key?

 

A click or anything?? Or do all the dash light go out and nothing happens?

[UncleBbq732]

When i turn the key I get nothing the lights go out on the dash but return when I release the key from the start position 

[CamGTP]

That says to me it's a wiring problem. I bet the truck would start if you directly jumped the starter with a screw driver across the terminals.

 

Something is going on with power wire between the battery and starter and or the power to the solenoid.

[UncleBbq732]

Lol it absolutely does start and run fine if I jump the starter 

[richard wysong]

neutral switch maybe? check at the starter relay for a signal from the ignition switch. also see if jumping the terminals at the relay will get it to turn over

[carkhz316]

You're likely missing control for the starting circuit. The ignition/ starting control circuit relies on a starter request signal sent to the PCM from the ignition switch to engage the starter relay. Then, if conditions are met, the PCM grounds the starter relay to engage the starter. This incorrect condition could be a few things, including neutral safety switch issues, bad wiring, bad relay, or bad PCM.

Edited March 10, 2024 by carkhz316