Question about 2001 Chevrolet Blazer

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When i pt it in 4wd hi it just flashes 4 times on the switch

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  • Anonymous Dec 02, 2008

    i have the same problem with my 94 blazer i never got a vacum hose diagram to trace the vacum hoses does any one no where i can get one

  • mikehumble May 11, 2010

    depending on the year you may need to reset the four wheel drive computer.

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  • 124 Answers

Reset the 4wd computer pull the ATC and courtesy lamp fuses for over 1 minute reinstall fuses cycle key on and off 5 times.

Posted on Dec 15, 2008

  • mikehumble Dec 19, 2008

    Have you fixed your problem? please rate

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  • 91 Answers

It sounds to me like a vacuum problem, or at least that is what I would check first. I don't know what year your Blazer is, but there is vacuum coming from the engine where the vacuum for the pcv valve hooks up. From there it goes to the check valve then splits to the vacuum tank and the inside for hvac vents and to the switch to the 4x4. Trace the lines, if its a vacuum leak you should be able to find it and fix it. Hope this helps, if that's not it let me know and we can go from there.


Posted on Nov 30, 2008

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GMJunkie
  • 74 Answers

SOURCE: 4wd wont switch out of 4 hi if it does goes to

Most likely the actuator motor on the transfer case or the switches in the dash,very rarely have I replaced the module under the dash!!
The switches cost around $65.00 and the actuator runs around $400.00 at the dealer for parts,Nether are a hard or complected job!
Hope this helps,Have a Nice Day!

PS From my experience it's probly the actuator motor.

Posted on Mar 10, 2010

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2 Answers

2006. How can I turn 4wd off and go back to 2wd?


how did you go to 4 wd from 2 wd . I use a switch on my dah .

Jan 11, 2016 | Suzuki XL7 Cars & Trucks

1 Answer

4 wheel drive will not switch from 4 high 4x4 to 2 wheel drive


on dirt? off road or on the road (pavement)

on ice?

do say what the tires are touching. we cant see you drive.

this car has parttime 4wd, its not AWD nor full time 4wd.

sorry, its PT. and the rules for PT always apply.



Part time is not for dry ice free pavement, at all.

if you do this, it winds up the drive line and causes the gears to lock. and worse.

the lost operators guide explained all that.



and needs to back up to unlock the front axle locks.

one more pain.

4WD S model, which used manual hubs, get out and turn dial.



so if doing all this wrong, on dry ice free pavement???

move car to shoulder that has dirt ./sand or gravel on 1 or 2 right wheels, then shift out of 4wd to 2H

or damage the transfer case you will.

like this guy did.

turn steering only slightly off center to get to curb, or it gets worse.







http://www.rubicon-trail.com/4WD101/driveline-bind.html





symptoms of bad drivers.....using 4wd, PT.

steers gard

funny sounds (of death)

gears lock up in transfer case or even in the manual trans.

or far worse.

May 10, 2015 | 1995 Isuzu Rodeo

1 Answer

99 suzuki grand vitara 4 wheel drive will clunk and pop the lever back into 2 wheel drive. Light is on when in 4x4 no flashing.there is only 56,000 miles on car. Could it need new gear oil or adjusting a...


it is part time 4wd? ? sure it is, it was for 35 years, at suz.
do not drive using part time.
on dry pavement. (it needs , ice , snow, or dirt (offroad)
it will wind up, you never said what you were driving on?
so......
AWD started in 2004, so you my guess using PT 4wd wrongly
Allwheeldrive.

http://www.fixkick.com/part-time-test.html

why
http://www.rubicon-trail.com/4WD101/driveline-bind.html

PT 4WD windup, did this, do let it happen to you
read the glove box operators guide.
it has CENTER DIFF.
25266836-rfypgoi0yo3mjxlednp3vf3v-4-0.jpg

Nov 02, 2014 | 1999 Suzuki Grand Vitara

1 Answer

My 89 jeep wrangler islander only drives in 4 Lo. If I put in 2 hi it clanks and I can hear the gears grind. First gear works decent but once you switch to second you can hear it grind again. What could my...


old dog , jeep, sure.
its a PART TIME 4wd, not AWD.
you post but forget (100s like this here) with no road surface stated.
dirt, ice, snow, off road, pavement. what??

my wild guess, is this car is new, to you,
and you never read the operators guide yet.
lost 25 years ago, but sold on fleabay
PT-4wD
do not drive on pavement dry , or you WILL wind it up.
WHEN I SAY 4wd I MEAN , the front lockers are locked AND
the transfer case is in 4wd.

Here is the best page on the net for PT-4WD
here we go , WINDUP. 101

http://www.rubicon-trail.com/4WD101/driveline-bind.html

answer, is , DONT DO That.

Mar 31, 2014 | 1988 Jeep Wrangler

1 Answer

4 wheel drive actuator


PT 4wd, or AWD?

the car if PT 4wd must not be driving on dry pavement.
only dirt, ice or snow. the reason its called Part time is that fact.
so if PT, and you are on say ice, and the lamp is out.
then the leaver is not working, the lamp does not prove 4wd.
it only proves 1 gear moved to 4wd in the transfer case.
read the FSM on you car, it has all these test.

move car to dirt. grass or ice and try one more time
is the lamp on now, good.
if lamp is on now test 4wd now, id it working for real?

for 4wd Pt to work the XFR cases need to be in 4wd
and power leaving case to front axles.
and the front axle must lock up. the fsm has the test for each step.
RTM.

alldata.com might help, login and read the 4wd sections.

Feb 13, 2014 | Toyota Cars & Trucks

1 Answer

Stuck in 4 wheel lo, how do i get it back to 2 wheel hi ?


On these issue, there are few solved help links for troubleshooting the issue easily.-------

Click the link below: ---

No 4x4 light on dash?

http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html

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4X4 Truck makes roaring noise in the front end?

http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html

-------------

Car will not go into 4WD high or 4WD low?


http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html

--------------

No 4x4 light on dash?

http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html

------------

4 wheel drive system will not disengage?

http://technoanswers.blogspot.com/2012/01/4-wheel-drive-system-will-not-disengage.html

----------

4WD light is flashing and beeping? NO 4WD high?

http://schematicsdiagram.blogspot.in/2012/02/4wd-light-is-flashing-and-beeping-no.html

----------

2002 Jeep Wrangler: 4WD Idiot Light is ON?

http://technoanswers.blogspot.in/2012/06/2002-jeep-wrangler-4wd-idiot-light-is.html

----------

Traction control switch will not engage on 4WD High or Low

http://whoisbyme.blogspot.com/2012/10/traction-control-switch-will-not-engage.html

-----------

4WD light flashing and 4WD will engage after few minutes

http://repairhelpcenter.blogspot.com/2012/10/4wd-light-flashing-and-4wd-will-engage.html

------------

2008 Toyota Tundra: 4x4 Wheel Drive Light is Flashing?

http://technoanswers.blogspot.in/2012/05/2008-toyota-tundra-4x4-wheel-drive.html

----------

4x4 front differential will not engage the axle on ford?

http://technoanswers.blogspot.in/2012/02/4x4-front-differential-will-not-engage.html

-------

4x4 will not engage on Ford F150?

http://technoanswers.blogspot.in/2012/02/4x4-will-not-engage-on-ford-f150.html

-------------

Dodge Ram 4x4 light keeps flashing

4X4 LOW LIGHT IS FLASHING ON DASH

http://technoanswers.blogspot.in/2012/09/dodge-ram-4x4-light-keeps-flashing.html

----------

Ford 4x4 front wheels will not engage?

http://technoanswers.blogspot.in/2012/02/ford-4x4-front-wheels-will-not-engage.html

-------------

These details will help.

Thanks.

Dec 09, 2012 | 1999 Chevrolet Blazer

1 Answer

4wd wont switch out of 4 hi if it does goes to


Most likely the actuator motor on the transfer case or the switches in the dash,very rarely have I replaced the module under the dash!!
The switches cost around $65.00 and the actuator runs around $400.00 at the dealer for parts,Nether are a hard or complected job!
Hope this helps,Have a Nice Day!

PS From my experience it's probly the actuator motor.

Mar 10, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

98 4runner 4wd hi wont engage


Check you fuse panel to see if you have a fuse blowed???? If not, my father have to instal a new motor that switches itno gear????

Nov 14, 2008 | 1998 Toyota 4Runner

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