How to test and replace a blower control module on a GMC Envoy.
Applies to any vehicle with digital climate control that is built on the GMT 360 platform which includes
02-09 Chevrolet Trailblazer,
02-09 Gmc Envoy,
02-04 Oldsmobile Bravada,
03-07 Isuzu Ascender,
04-07 Buick Rainier and
05-09 Saab 9-7X
Also applies to many other GM vehicles which use the same digital climate control module.
This GMC Envoy was brought to me with an inoperable HVAC blower. A few brief tests revealed the Blower Control Module had failed and was not providing power to the blower motor.
Gm vehicles with digital climate control use a Blower Control Module instead of a Blower Resistor to control power to the blower motor. Failure of this module and it’s manual HVAC counterpart the Blower resistor is common.
Post time: Jun-05-2017