Ok... so my 98 C1500 had a CS130D and I decided to upgrade to a CS144. The CS144 uses the same bolt pattern but it has the square pigtail vs the oval pigtail on the CS130D. Both utilize the “L” pin to monitor voltage output. For the one wire applications such as mine, that’s the only pin you have to worry about in the pigtail. The CS130D puts out 105 amps new and the CS144 puts out 140 amps new. The price difference for new AC Delco parts was about $10 on Amazon so the upgrade was a no brainer. The square pigtail cost $8 on Amazon. When doing the upgrade, it’s pretty simple and straight forward... 2 bolts hold in the alt, 1 wire from the battery to disconnect, and then the pigtail. The CS144 is slightly bigger than the CS130D so you’ll have to massage the AC line that’s in the way. I used a pry bar to gently move it over and then I used a dead blow hammer on the alt when installing to help seat the alt and reshape the AC line (it gets squeezed a little). Regarding the pigtail, the new one comes with 4 wires... if you only need the “L” wire, take the pigtail apart and remove the other 3 wires. Use RTV to seal the holes on the back once the wires are removed to seal the pigtail. Splice the new pigtail in and you’re good to go. All total, it took about an hour because I was being cautious. Also, it took me a few minutes to get the bolt slides to back out so the new alt would fit in easy. If you don’t do this, you may be beating on the alt a little more than I had to. Now I have 14+ volts reading on the gauge and my lights don’t dim when I roll the window down. [emoji51][emoji51][emoji51]
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