I HAVE NEVER USED THE 4WD, BUT THE C/D LOCK BLINKS, BUT NOT EVERYTIME. SOMETIMES IT WILL LIGHT UP AND OTHER TIMES IT DOESN'T. I WENT TO THE DEALER ABOUT THE PROBLEM BUT THEY SAID IT WAS NOTHING. WHAT'S THE PROBLEM?
I have the same problem and the dealership is saying that there is a service bulletin that this problem is with the transfer switch. They said that all 5 have to changed. Don't know if they are full of it or not. ;)
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Put back on H2 or all normal, remove both battery cables from the battery, without touching the battery, hold the positive and the negative cables together for 30 seconds, then return the cables to the proper posts on the battery. This will drain all memory at the ECU, the next 10 or so miles , under normal driving will re- teach the computer. I hope this improves the issue!
96 chevys have a ifs (independent front suspension) this give it more ground clearance but does not have lock out hubs, the cv axles go into the front differential an spin freely until you put it in 4wd, how this works is your transfercase spins the drive shaft that goes into the front differential an while you put it in 4wd it sends power to the actuator to lock the front differential. if your front end isnt pulling you either popped your 1 of your cv axles but if you did this you would know because it makes a very loud thunking noise while you're driving, my guess is you have a short thats not sending power to the actuator. check to see if the wiring harnesses are connected and check if the fuse that operates the 4wd in the cab of the truck is not blown. also actuators for these trucks are horrible they go out alot
That depends a lot on how your truck is equipped. GM uses several different 4 wheel systems including AWD, Part-Time 4WD, Full-Time 4WD, and ON-Demand AWD. Then there is another version used on some trucks that is a combination of 4WD and On Demand AWD. - it gets a little confusing but each system as slightly different charachteristics.
Genericly speaking, if you have the push-buttons on your dash that say "4-HI", "4-LO", and "2HI" and/or Auto-4WD , the transfer case has an electronicly-controlled stepper motor which shifts the transfer case into the selected mode. An electric solenoid/actuator then engages/disengages the front differential for 2-Wheel or 4-Wheel modes. One push of the button and it shifts the transfer case and engages the front differential.
That's much easier than the old days when you had to stop the truck, get out (Sometimes in the middle of a big mud hole) and lock the front hubs then get back in and play with the lever in the floor to get the transfer case to shift into the desired mode.
This is a manual center differential lock button for 4WD models. When you push this button, it manually locks the front and rear axles. An amber C DIFF LOCK light should appear on the dash board when engaged. Push it again and it will disengage. It may take a few seconds to disengage, and a beeping will be heard until the diff is unlocked.
The center differential lock is only meant to be used in emergency situations. Driving with it engaged at all times can damage your differential.