Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN









Re: 2002 GMC Sonoma 4 wheel drive


  Email This Post



Sonoma
Novice

Dec 11, 2011, 9:36 AM

Post #1 of 9 (4303 views)
Shortcut
  post locked   Re: 2002 GMC Sonoma 4 wheel drive  

OK, When it rains it pours. I just found out that the 4-wheel drive is not engaging. When I change from 2-wheel to 4-wheel drive I can hear the transfer case engage and the light on the dash comes on, but that's it, no 4-wheel drive. I am wondering if this is not related to my trouble with the heat selector switch since they both use vacuum(I believe) to change.

I used to hear a "whooooosh" sound when changing the selector for the heat and don't anymore. It seems like an awful coincidence that these two things would quite working at about the same time and NOT be related.

Would you suspect a bad vacuum line somewhere? What would be common to both problems?

Hey, at least I have heat if I get stuck.

Thanks for any help!
Gary


(This post was edited by Hammer Time on Dec 11, 2011, 9:55 AM)


Discretesignals
Veteran / Moderator
Discretesignals profile image

Dec 11, 2011, 9:52 AM

Post #2 of 9 (4294 views)
Shortcut
  post locked   Re: 2002 GMC Sonoma heating problem [In reply to]  

The HVAC mode doors and the front end actuator on the S15 with a NVG 2 speed transfer case are both vacuum operated.

Inspect the vacuum lines under the hood. You may have a rotted out or disconnected vacuum line. Pay close attention to the vacuum lines around the brake booster area. In the fender on the driver's side is the vacuum reservoir where lines rot out also.







Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Dec 11, 2011, 9:55 AM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 11, 2011, 9:57 AM

Post #3 of 9 (4280 views)
Shortcut
  post locked   Re: 2002 GMC Sonoma 4 wheel drive [In reply to]  

I detached this part of your question and started a fresh question with it as you should have. We need to keep issues separate.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Sonoma
Novice

Dec 11, 2011, 10:22 AM

Post #4 of 9 (4271 views)
Shortcut
  post locked   Re: 2002 GMC Sonoma 4 wheel drive [In reply to]  

Sorry, I just assumed that the two problems were related so I didn't need to start a new thread.

Thanks!


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 11, 2011, 10:47 AM

Post #5 of 9 (4253 views)
Shortcut
  post locked   Re: 2002 GMC Sonoma 4 wheel drive [In reply to]  

It's possible but will get more attention this way.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Sonoma
Novice

Dec 11, 2011, 5:50 PM

Post #6 of 9 (4232 views)
Shortcut
  post locked   Re: 2002 GMC Sonoma heating problem [In reply to]  


In Reply To
The HVAC mode doors and the front end actuator on the S15 with a NVG 2 speed transfer case are both vacuum operated.

Inspect the vacuum lines under the hood. You may have a rotted out or disconnected vacuum line. Pay close attention to the vacuum lines around the brake booster area. In the fender on the driver's side is the vacuum reservoir where lines rot out also.



I hope it's OK that I borrowed your graphic.
I love it when a plan comes together! Thank you so much! This is what I found........



Selector switch for heater and 4-wheel drive both work again.
Thanks again!
Gary



(This post was edited by Sonoma on Dec 11, 2011, 5:57 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 11, 2011, 5:59 PM

Post #7 of 9 (4228 views)
Shortcut
  post locked   Re: 2002 GMC Sonoma heating problem [In reply to]  

 

I guess you were right. It was related.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Dec 11, 2011, 6:00 PM)


Chuck319
New User

Sep 24, 2012, 12:05 PM

Post #8 of 9 (3109 views)
Shortcut
  post locked   Re: 2002 GMC Sonoma heating problem [In reply to]  

I am having the same problem - but it appears that what you found was removed from your post? What was the fix??


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 24, 2012, 12:09 PM

Post #9 of 9 (3105 views)
Shortcut
  post locked   Re: 2002 GMC Sonoma heating problem [In reply to]  

Please read posting rules and do not respond to old threads.

http://autoforums.carjunky.com/...ORE_POSTING_P122999/




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.





Advertising


  Email This Post
 
 






Latest Forum Post

1990 chevrolet c1500 4.3 tbi 110k recently replaced motor w/ a 93 4.6 had a fe...


I am having a random repeating problem with a 2007 Honda Civic. The fuse that op...


Hi everybody not mechanical at all PLEAE HELP I HAVE A 2000 FORD TAURUS SE,,,B...


2003 Chrysler mini van. 3.3 ltr 133600 mi while driving, engine light came on b...


driver side spark plugs was no problem-3 out and 3 new ones in,now it's time fo...


1998 Chevy 3500,6.5 diesel,automatic trans,4WD,1ton dump truck. Problem:Driving ...


Feed Button






Automotive Forum Categories
AC Auto Repair
Auto Body Repair
Auto Insurance
Automotive Repair
Automotive Wiring
Automotive World
Brake Systems
Car Care Tips
Car Racing
Car Shows and Events
Car Stereo Repair
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair
Gasoline and Motor Oils
General Discussions
Motor Vehicle Inspection
Motorcycle ATV Repairs
Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Repair
Motorcycle Seat Repair
Remote Control Cars
Steering and Suspension
The Bargin Bin
Traffic Ticket Help
Tricks of the Trade
Truck Repair
Truck Repair Advice
Truck Engine Repair
Truck Suspension Repair
Car Forum - Sitemap


Search for (options) Privacy