No crank, no start

[Jgwinn21]

Originally my brother bought this 2007 automatic gt. Was great for a couple years. Cowl drain became clogged and water came into the cab and ruined the bcm.. replaced it with one from online that came ready to plug and play. Lasted a few months and there is a leak somewhere else and think maybe it ruined the new bcm. I’m unsure and need help with diagnostics. The gauges do not sweep. Starter does nothing, fuel pump doesn’t kick on. Lead me in the right direction please.

 

[DieHarder]

Originally my brother bought this 2007 automatic gt. Was great for a couple years. Cowl drain became clogged and water came into the cab and ruined the bcm.. replaced it with one from online that came ready to plug and play. Lasted a few months and there is a leak somewhere else and think maybe it ruined the new bcm. I’m unsure and need help with diagnostics. The gauges do not sweep. Starter does nothing, fuel pump doesn’t kick on. Lead me in the right direction please.

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See online manual. https://iihs.net/fsm/?d=0 Not great (some pages not in order) but it's free.

No crank, no start: https://iihs.net/fsm/?d=9&f=Step 2- No Diagnostic Trouble Codes (DTCs) Present Symptom Chart Index.pdf

No crank: https://iihs.net/fsm/?d=9&f=Step 3- No Diagnostic Trouble Codes (DTCs) Present Symptom Charts.pdf&p=9

Symptom chart: https://iihs.net/fsm/?d=206&f=Starting System.pdf&p=9

Starter: https://iihs.net/fsm/?d=205&f=Starting System.pdf

Starter wiring diagram (auto): https://iihs.net/fsm/?d=40&f=Starting System.pdf

Diag/testing: https://iihs.net/fsm/?d=206&f=Starting System.pdf

Pinpoint tests: https://iihs.net/fsm/?d=206&f=Starting System.pdf&p=3

If you don't know what you're doing find someone who does or worst case may be worth paying for a diagnostic at the dealer. Good luck.