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2005 Chevrolet Trailblazer LS 4.2L Blower motor electronic resistor block
Posted to GM HVAC on 5/14/2013 19 Replies

Vehicle has been back three times now with only high speed working. Each time I have found diode on control module to have failed. Replace module and find all to work normally. I am looking for sugestions as to what to test to see what is damaging these module...

19 Replies Received (View Replies)

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Message Closed w/FIX

car Vehicle Data

2005 Chevrolet Trailblazer LS

VIN 1GNET16SX5
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedBlower Motor Electronic Resistor Block
ConditionsOnly Works on High Speed
Message Closed w/FIX

car Vehicle Data

2005 Chevrolet Trailblazer LS

VIN 1GNET16SX5
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedBlower Motor Electronic Resistor Block
ConditionsOnly Works on High Speed