Transfer Case

By bhr
September 18, 2011 in Ask A GM Technician

Recommended Posts

bhr

Posted September 18, 2011

I have a customers 2007 GMC Youkon XL 4X4 that has the service 4X4 light on. I pulled code CO378 from the transfer case (front axle switch circut signal invalid). I need a more descriptive code info to start the repair and where to start. Any help would be appreciated. Thanks!

bhr

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

Recently Browsing 0 members
- No registered users viewing this page.
Forum Statistics

250.4k
Total Topics

2.7m
Total Posts
Member Statistics

342,840
Total Members

8,960
Most Online

Newest Member
appletrav
Joined 1 hour ago
Who's Online 6 Members, 0 Anonymous, 418 Guests (See full list)
- wardo5757
- rjgvt
- KARNUT
- Gbeaux
- cautious optimist
- PhilB

Latest Articles
- Hummer Turns 25 and GMC Brought the H2’s Yellow Back
  Wednesday at 06:04 PM
- What’s New for the 2027 GMC Yukon and Yukon XL
  July 13
- Got a “Service Door Latch” Alert? Fix It in a Minute
  July 9
- GM Recalls Cadillac VISTIQ Over Power-Folding Seats
  July 8
Posts
- Chirping/squeaking coming from under dash when driving over bumps
  
  By appletrav · Posted 1 hour ago
  
  I read that there’s a bolt on the battery brace that sometimes gets loose. I checked all the bolts around there that I could, and all were tight. This sounds more like it’s under the dash, maybe closer to the driver footwell. Anyone else have this problem, or know a possible cause? https://imgur.com/a/kaQRZZH
- Different requirements for oil filters?
  
  By glenn27 · Posted 4 hours ago
  
  Morning here- I have a 2013 GMC Sierra 1500-5.3 L engine (low mileage -two owner)--I'm retired now-so I don't drive as much--anyway-just had the oil /filter changed-I have always used Amsoil Synthetic and NAPA gold oil (#7045) filters-now i read that GM has changed the oil filter requirments for these engines- and they (GM) recommends/ want to go w/ a different filter w/ more psi rating on the relief valve (in the filter) to open like 22 psi. The above featured one I mentioned shows 12-15 PSI--which doesn't kmeet these new specs.. Wow-stuff is like getting more/more technical all the time. I think it looks like trying to avoid these sticky lifter problems. Any thoughts or recommendations here? I'm kinda confused-- Thank you- glenn
- Info on AFM/DFM delete options on 2013 GMC Sierra 1500 w/ 5.3 engine?
  
  By glenn27 · Posted 4 hours ago
  
  ///// I went ahead and bought/plugged in the new Boost brand dongle thing last week. Haven't driven it much yet-but seemed a little smoother/quicker maybe in stop and go traffic. What I did like about this brand was the reviews and made in USA> (hopefully).
- give me some tips to make my truck look better
  
  By StingerZ16 · Posted 4 hours ago
  
  Headlights look aftermarket. Now replace the grill and maybe do something with front bumper.
- give me some tips to make my truck look better
  
  By slj2008 · Posted 5 hours ago
  
  welcome - Black Rim's , But that's me
GM-Trucks.com Clubs
- Black Truck Club
  
  Open Club · 612 members
- White Truck Club
  
  Open Club · 380 members
- Canadian Owners Club
  
  Open Club · 282 members
- Red Truck Club
  
  Open Club · 157 members
- diesel 3.0
  
  Open Club · 281 members
- Texas Owner's Group
  
  Open Club · 371 members
- NorthSky Blue Club
  
  Open Club · 118 members
- Midwest Owner's Group
  
  Open Club · 213 members
- 2015 Custom Sport Club
  
  Open Club · 5 members
- GM Snow Plowing Club HD
  
  Closed Club · 14 members
Popular Contributors
- Week
- Month
- Year
- All Time
1. 1
  
  Grumpy Bear
  19
2. 2
  
  Chuck FB
  17
3. 3
  
  newdude
  13
4. 4
  
  txab
  10
5. 5
  
  CamGTP
  8
Show More