I have a 2001 Chevy Blazer that will not shift into 4WD, 4HI or auto 4WD.
I've tried everything, shifting from a stop, shifting when in neutral. It
just stays in 2WD.
Does anyone have suggestions of what to check? I'm not that car savvy, I
know some women are, but I'm not. I do good to check my oil, have it
changed on a regular basis, have my tires rotated, you get the idea. But
I am a single mother tight on money and the dealership I bought it at told
me it would be $40-80 to diagnose what is wrong, then will depend on what
is wrong as to how much it would be to fix it. My car is not under
warranty so I'm sure they would charge an arm and a leg even if it is just
to reconnect a vaccuum hose that is loose or something!
If it's anything too complicated to check, I'm sure I could print it out
and find a guy friend to help me check it, so I'm open to ANY suggestions
of things to check. Thanks in advance.
Not too familiar with the Blazer. I have fixed a couple of the switches on
the Silverado's that do the same thing. GM has got some cold soldier joints
on the board connection where the wire harness plugs in. On the silverado,
resoldering it solves the problem and also fixes the service 4WD light.
Unfortunately, you really don't have much choice but to get it
scanned for ATC (automatic transfer case) codes and see what
comes up as a fault code. If you do have the (auto4hi) button, then
you can only see codes with a scanner. The other Blazer 4x4 system
without the automatic t/case can be diagnosed without using a scanner.
I would hazard a guess that you may need a software update. We
get a lot of the newer 4x4 systems in that lock up and won't do
anything....in many cases, there has been updated software released
If the lights flash when you try to engage auto4hi or 4hi, but it won't
complete the shift, then you may have a problem with the vacuum
solenoid that engages the front diff. I've seen a number of them go
south. This solenoid is actually mounted to the firewall right above
the distributor at the rear of the engine. A quick check is to disconnect
both vacuum hoses from the solenoid, verify there is vacuum on one
of them (engine running) and then manually stick them together and
see if the 4x4 completes it's shift. If so, you most likely need a new
solenoid (this assumes that this year uses this system, I can't quite
remember which years they used this, but I believe your vehicle
is in that range)
Well, after talking with a couple friends, no one felt comfortable messing
with my car. So I ended up taking it to the GM dealership my friend works
at instead of the Chevy dealership I bought it from.
But like you said Ian, I would need to take it in anyway. A few months
back I replaced my battery because it kept dying and I'd have to find
someone to jump start me. The old battery was grotesquely bulged but I
did not see the mess it had left on my battery shelf. Turns out the
battery had leaked and the acid had dripped down on to my actuator cable
and ate it up pretty good!
Helps to have connections, only had to pay the $27 for the part and the
labor is going to be covered in a purchase of a certain alcoholic
beverage, lol. Guys are so easy to please ;)
Thanks everyone for your help and suggestions!
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.