× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: 1999 gmc c6500 fuel pump 7.4 liter
Posted to HD/Fleet Forum on 2/18/2011

If you have access to Alldata, you can get it from there. The wire colors may not match but it's basically the same system in use on the pickups.

Both tank senders need to be working. They report to the module which turns on the (relay for the) balance pump ... Login to read more.