AboutCAJUNSC/RAMBLER390 Expertise 1998 and NEWER questions ONLY!! I WILL REJECT QUESTIONS FROM 1998 BACK. Electrical diagnosis. Brake Diagnosis. Driveability, Service Engine Soon Lights. Some Engine mechanical. Tires and wheels. ABS. HVAC. Air Bag (SIR). Interior, seats, etc... 6.6L Duramax Diesel diagnosis. 6.5L diesel diagnosis. I WILL not answer Alignment questions OR carburetor questions. No heavy internal transmission
I need YEAR, MAKE and MODEL of vehicle, and ENGINE SIZE and TRANSMISSION type, IF applicable to the question.
I work at a Large, Busy GM Dealership
Last thing, my answers are JUST SUGGESTIONS and ADVICE and you should ALWAYS CHECK with your mechanic for proper diagnosis and repair.
Experience 18 Years GM Dealership experience as an "A" line tech. ASE MasterTechnician. 100% GM certified MTC Certified.
Education/Credentials High School graduate. No College or higher learning.
Question My vent switch (the one that changes heat / ac to floor, defrost, mix etc) makes a clicking noise when it is changed. I currently leave it in one place, because I finally got the switch from clicking non stop. I assume this is an electronic switching device and that the module or switch is bad? Any idea the level of repair to get in the dash and dx or change out the switch? Is this a common problem?
thanks,
ken
Answer Hi
The part is called the "Mode Actuator". VERY COMMON, I have one waiting for me Monday AM.
I am assuming it is the drivers side control.
If so it can be repalced without removing the Mode cam. (Large cam that operates another door higher up on HVAC case)
It CAN be done by prying the actuator off evenly with 2 screwdrivers. (I have a special tool, though to preform this job.)
You're going to have to remove the lower "knee bolster" and trim from under steering column.
I remove the upper trim (around gauges) and I also remove the IP Cluster (guages). Thats me though, some do some dont. It is not necessary to do so.
The Mode actuator is the middle one, with the large circular cam mounted to it.
Level I would guess 5 or 6 to a do it yourselfer depending on YOUR ability.
I Hope this helps
Pawl
