SSmokin 01

iTrader: (14)

I made a shroud to replace the single 16" fan (procharger) with dual 12" . I'm using one factory fan on the right and a slim line on the left due to clearance issues.

I want to wire the stock one as the primary and the slim line as the secondary.
Just don't know which one on the factory harness (left or right) it is. Thanks.

99LS1_TA

iTrader: (3)

There is no Primary fan. Both fans are on at the same time, just two different speeds.

SSmokin 01

iTrader: (14)

I'm talking about the one that comes on at a lower temp as being the primary. I want the stocker to run more than the aftermarket one due to durability and cfm rating.