Looking for some help.
Can anyone recommend a good website/source for 4WD troubleshooting?


My 96 k1500, 5.7L, 4L60, 243C, won't engage 4WD. The 2H lite flashes then goes out.
I've checked the fuses, tried to get diagnostics from grounding pin 13 and bench tested the front axle actuator.

I've read that the switch (in the dash) can be a common problem with these trucks. How can you check the switch w/o R&R it?

Has anyone else had to deal with this? How'd you end up fixing it?

Thanks, Mike.
Puyallup Wa.
mikenallisonbrazil@msn.com

 

Mike,

I had a 97 K1500 that did the same thing... Apparently there is some sort of mechanism that heats up some wax or something to enagage the FWD. They were prone to going out. Had mine swapped out with an electric one and it worked fine.

-J Rod