Hey everyone, OE Parts Headquarters here. We have some ACDelco ignition coils in stock for your 1999-2007 Silverados with V8 Gasoline engines. There are two different types available. One is the Mitsubishi and the other is the Delphi. The links below should take you to our site and display the parts.

The Mitsubishi coil is a D581 for $38.31
The Delphi coil is a D585 for $82.42

These are genuine ACDelco parts and have a one year warranty. Also know that orders over $75 will ship UPS ground for free. As for orders under $75 UPS ground shipping is $6.99. If you are unsure as to which igntion coil you need. Just send us a PM with your trucks vin number and we will get back to you as soon as possible.

Thanks
-OEHQ