Ticking Under The Hood
- Thread starter Dillyo82
- Start date
Easy to turn off the AC or unplug the fan clutch to see. I'd guess the fan clutch software. Was it ever updated after the 2005 improvement?
- Aug 17, 2012
- 80
the roadie said:
Found it by searching Fan Clutch Update. It's below if anyone stumbles on this thread.
http://gmtnation.com/f24/clicking-sound-near-fan-clutch-2796/
Thanks Roadie!
Lima Tango
Member
- Dec 4, 2011
- 242
Did all 2005s have this update at birth? I have a ticking sound described exactly this same way but I have an '05 so presumably it's not the software update issue. Original fan clutch, so should I start planning for a later year style? The exact year escapes me at the moment but IIRC the later years were better...
The fan clutch hardware redesign and the PCM software update happened in calendar year 2005 sometime, but the month escapes me. 2005 MODEL vehicles could have been manufactured any time starting before 2005 calendar year, and vehicles could have been updated if you're not the original owner. GM's records might have a record of updates performed.
GM often slips in updates as the model year progresses, so there's no real way to tell other than visiting a dealer. Ick, I would so need a month of continuous showers after that process, my local dealers are such total slimes.
GM often slips in updates as the model year progresses, so there's no real way to tell other than visiting a dealer. Ick, I would so need a month of continuous showers after that process, my local dealers are such total slimes.
Lima Tango
Member
- Dec 4, 2011
- 242
the roadie said:
Ugh, not looking forward to a dealer visit. If they do show that I have the older pcm software, will updating it overwrite my PCM4L tune?
Simon01
Member
- Dec 5, 2011
- 116
the roadie said:
IIRC, all 2005 MY vehicles have the software update installed. The updated fan clutch went on 2005's built after May 2005. In my case, my TB was built in October 2004, so I had the updated software but the old design clutch. My fan clutch just went out this summer and after I replaced it with a Behr-made unit with the hardware updates and there is a big difference, especially with AC performance in hot weather.
When they install a tune do they have the capability of installing this software update or is this something that only the dealers can do with a TechII ? In my area its about $90 just to hook the truck up to the Tech II, then the clock starts for whatever they have to do.
6716
Member
- Jul 24, 2012
- 833
the roadie said:
Is the fan clutch connector of which you speak located near the top of the fan shroud on the battery side? Only one right about there?
I've got a recent, random-ish clicking-type thing near the fan area. Last fan clutch was replaced three years / 75K ago. Truck is a 09/04 build, according to the driver's door.
If I can just figure out the right connector, and how to get it undone without breaking .....