In underhood fusebox, what relay goes in the control loc marked- "COOL FAN"

What is your question?

In the underhood fusebox, the 3 relays for the cooling fan, one is marked "COOL FAN" (IT HAS 5 PINS) IT IS MISSING & I DO NOT KNOW WHAT RELAY TO INSTALL? THE OTHER TWO ARE "COOL FAN 1 & COOL FAN 2 ,THEY USE a 4 PIN RELAY (5510-0329) CAN ANYONE PLEASE TELL ME WHAT RELAY BELONGS IN THE SPOT MARKED "COOL FAN" ON A 2007 PONTIAC G5 OR, COBALT, OR A HHR, SATURN ION, OR ANY 2007 MODEL VEHICLE/LEXUS 300 WITH A 2.2 LITTER ENGINE????. In the cool fan 1 & cool fan 2, they both use a (4 pin) 5510-0329 relay but the one marked "cool fan" is missing & it appears to use a 5 pin relay...what relay is it??????

What makes this problem better or worse?

Car is fine at speed.when at low speed, temperature climbs, fan does not operate, a/c does not work! I tested fan & it works!

How long has your 2007 Pontiac G5 had this problem?

7-8 months since I purchased this car.