LB7: Upgraded Alternator; wont start now.

[spayne67]

At one fell swoop, I changed my power steering pump, cooling fan and alternator. My alternator I went from a 105 amp to a 145 amp from O'Reillys. Put everything back together and the truck will not start, won't even try to start; I did charge the batteries. I do have interior power and exterior lights do work. I can hear a very slight clicking noise from the engine area. The dash does have some gauge lights but dims and flickers.
2003 Chevrolet Silverado K3500 Duramax/Allison; stock. Any suggestions???

 

[mike diesel]

What's the battery voltage?? Sounds like you got dead batteries right off the shelf. What is the date code on the batteries?

 

[spayne67]

Batteries are good and charged. The truck started and ran fine prior to my handy work.

 

[dmax711]

Batteries are good and charged. The truck started and ran fine prior to my handy work.

Check all your grounds. Make sure all your connections are good at battery's. I had a recent problem on a truck and it was a loose connection. Sometimes just doing what you did will move a previously loose connection just enough to where it won't start.

 

[spayne67]

Will do. Making sure I get all corrosion off the battery terminals also. Will know tomorrow.

 

[spayne67]

Thanks for your help. It was corrosion built up on the battery terminals. Cleaned them up good, put some protectant on them, re-installed and she fired right up.:thumb:

 

[easy money]

Check your fuses!:hug: