Hey everybody. Need help on my baby. I keep it parked in the driveway which is a slight incline. I start it once a week when I don’t drive it. Went to start it up and the battery seemed dead. Installed new battery and still the same result. No CEL, flashing hazards, no codes. Reset the inertia switch by pressing the button on the firewall. Same result. Never had this issue before. Please help. Thanks in advance!

 

Does the instrument cluster come on? Lights? Voltage to starter?

 

Check ground cable where it connects to alternator bracket. Remove bolt and clean with wire brush, don't just look at it...corrosion happens between terminal and bracket. If all connections are clean and tight, slide underneath and jump starter terminals.