I'm having a problem with my 2002 Silverado Pickup with 5.3 engine. I was
wondering if anyone could helpo me out.. The problem is in the Heater / AC
control. I don't have any slow or #1 speed on the blower fan. All the other
speeds work fine. Years ago the blowers had a resistor in the circuit but if
I rememeber correctly If the resistor went you lost all the speeds but high.
I'm thinking it is the switch $145 but I dont want to replace it if in fact it
is the resistor. Does anyone know where the resistor is located on the newer
trucks? It's not on the blower box under the hood like they used to be. Yes I'm
Thanks in advance ,
Rick, sorry I can't help with the location, but I lost low speed only on
the fan in my 2002 Silverado and the dealer replaced the resistor under
warranty. It took them a couple hours to fix, but I'm not sure if they
were working on the truck the entire time. I did just replace the
resistor in a 1999 Cavalier, it was in the fan housing, accessed it from
under the dash. Took about 5 minutes to change, after looking for 15
Its your blower resistor. It is possible to lose one speed and not the
others, usually speed 1 or speed 1 and 2. Access the blower motor and trace
the wires that are plugged into the blower motor back to the resistor module
(it has an integrated relay). The resistor card of your new one might be a
different color witch is normal, they updated the part. The gold hex head
screws holding it in are 5.5 mm. Good Luck!
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