RepairPal Certified shops can diagnose and repair your 2000 GMC Savana 1500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
With key off, remove the suspect relay , gently start it back into place,, hear or feel it click?? If it clicks it is 'CLOSING' and sending voltage to it's designated circuit! Now, your best bet is to have a parasitic load test performed!!
That's a good idea!
Damn good idea!