secondary cooling fan

is the secondary cooling fan the same between towpak and non towpak cars? I need to replace my fan. It has power to the plug but the fan doesn't run.

The brackets for the fans are different on the drivers side and passenger side. The fans blades and motors are the same.

Thank you!

Secondary (passenger side) fan from a Caprice or Buick should be a clean swap. Are you near a pick-and-pull?

yes i am they show a 92 roadie in stock. unbelievably no Caprice's

So I found this chart info below, and thought it might help others that were concerned about their fans both coming on.

B/D-car LT1 (Caprice/Impala/Roadmaster/Fleetwood) Cooling Systems:

Standard equipment for all LT1 equipped B/D-cars is a dual electric fan setup with a 150-watt primary (RH) fan and a 100-watt secondary (LH) fan. The electric engine coolant fans are independently operated by the PCM (Powertrain Control Module) based on the inputs from the Engine Coolant Temperature (ECT) sensor, A/C Pressure Sensor, Vehicle Speed Sensor (VSS), and various other inputs.

The B/D-car coolant fans operate under PCM control at the following engine temperatures and A/C system pressures:

Fan Mode ... Temp ... Pressure

Primary (RH) Fan ON ... 109°C / 229°F ... 189 psi
Primary (RH) Fan OFF ... 105°C / 221°F ... 150 psi
Secondary (LH) Fan ON ... 112°C / 234°F ... 240 psi
Secondary (LH) Fan OFF ... 108°C / 227°F ... 210 psi

Additionally, the PCM will turn off the fans at higher vehicle speeds (above 48 MPH I believe) since running fans can actually impede airflow through the radiator at high speed. Each fan also has a minimum running time. Once activated, the primary fan will run for a minimum of 50 seconds, and the secondary fan for a minimum of 26 seconds. Finally, certain Diagnostic Trouble Codes (DTCs) may cause the PCM to turn on one or both fans.

Hope that helps!

-Texas Mike

There were 2 additional cooling packages beyond the standard package. Towpack cars got V08.

V03 "Extra Capacity" and V08 "Heavy Duty" cooling both increased the secondary fan motor size. In 94 and 96, I believe the secondary was 150 watts, same as the base primary. In 95 there were 2 possible secondary fan motors used: some got the same 150W as other years but some 95 cars may have been fitted with a 240 watt monster secondary.

As far as I know the V03 primary fan was the same as the standard cooling model. The V08 replaced the electric primary with an engine-driven viscous clutch mechanical fan.

So, to answer your question: it depends. Towpack cars with HD cooling got more powerful secondary fans than standard cooling cars, but the same secondary as "Extra Capacity" cooling cars.

All that said, as far as I know the actual electric fan blade wheels are all identical and the only difference is the motors.

Did you hear about the dyslexic agnostic insomniac?

He stayed awake all night worrying about whether or not there really was a Dog.

(Cue snare/cymbal crash)

Please ignore my gaff in previous posting on the position of the secondary fan.  If you are replacing the primary electric fan, or adding a primary electric fan to replace the mechanical one, you need the passenger's side fan and bracket from a donor car.  The driver's side fan is the secondary.