Question about 1996 Chevrolet K1500

1 Answer

Chevrolet truck 4wd switch blinks

When i push the buttons for 4hi or 4lo they just blink. When i got the truck a couple months ago they would blink about 5 times then stay on and the 4wd would engage. Now they just blink. The other day i was driving home and noticed my 2wd light that is usually on wasn't lit. When i got home i tried pushing the 4hi and 4lo buttons and they wouldnt light up either. When i drove it the next day the 2wd light stayed on like normal but when i push the 4hi and 4lo buttons they just blink and never stop blinking to engage. The 4lo stopped blinking to engage once and i could hear it under the truck but would never do it again. All i get is a blinking from the 4hi and 4lo. I had the transfer case checked out by a transmission shop when my transmisson was getting rebuilt and everything was okay with the transfer case. The guy even swapped parts off of another transfer case to see if that would fix the 4wd issue but it didn't work. Could it be the actuator switch on the axle? Please Help this is frustrating.

Posted by on

  • 3 more comments 
  • spencern695 Jun 21, 2009

    i have a computer scanner at work and when i hooked it up it came back with no codes.

  • spencern695 Jun 21, 2009

    I haven't taken the actuator switch out to check i just didn't know if that would be the problem yet. I will try tapping with hammer and see if it engages.

  • jaybyrdn91 May 11, 2010

    Good luck bud and lemme know if it works... if not I will try to come up with some more information to try and help you.

  • jaybyrdn91 May 11, 2010

    Start your vehicle and place it in nuetral. Then try tapping on the actuator with a hammer while someone pushes the 4-hi button inside the vehicle. Sometimes lack of use of the 4wd system will allow for corrosion to build up inside the electrical part of the actuator. Tapping on it with a hammer can knock this corrosion loose and allow for electrical contact to be made, ultimately engaging the actuator and locking in the 4wd.

  • CarlosRPena May 11, 2010

    Have you remove the acuator and check it?



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 35 Answers

If they are blinking I believe it means that there are fault codes present in the pcm. You need to get the computer scaned to see if there are an codes present. If you live near an Autozone or Checker autoparts they can scan it for free.

Posted on Jun 21, 2009


3 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

  • 1 Answer

SOURCE: service 4wd light

what causes the 4wd to kick in when you have it in 2wd

Posted on Apr 05, 2009

  • 96 Answers

SOURCE: 04 Z71 4wd problems

can you hear the shifter motor trying 2 shift? if not its the shifter motor open the door and try 2 listen when your trying 2 shift it

Posted on Feb 13, 2010

Testimonial: "thanx"

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

My 1997 GMC Sierra lights for 4hi and 4lo blink when i push the 4hi button and then goes back into 2hi. but when i push 4lo it locks in and works fine. I tried changing the 4wd motor on the transfer c

THE TRANSFER CASE MOTOR IS ONLY FOR 4WD LOW. That would have never been the problem as soon as you confirmed it shifted into 4wd Low. 2wd and 4 Hi work off of vacuum. You may have one or two issues. A vacuum leak up by the front axle that engages the 4wd HI or the sensors on the transfer case.

Nov 22, 2013 | 1997 GMC Sierra

1 Answer

04 tahoe z71 the allwheel drive,2wheel drive,and 4hi,4lo buttons don't alwas work sometimes it's in 2wheel drive then go to 4lo and when i push the 2wheel button it just blinks and the 4lo button stays on...

Your best bet , take it to a qualified repair shop . Service 4X4 light's blinking . DTC'S - diagnostic trouble code's stored in the 4X4 control module.

Jan 22, 2018 | 2004 Chevrolet Tahoe

1 Answer

4HI and 4LO light flashing 2000 Blazer LT

it is very possible that a wheel speed sensor is open or reading erratic, causing the ECM to override the 4WD switch. Borrow/rent/buy a scanner that will tell you this info,

Jul 15, 2009 | 1997 Chevrolet Suburban

1 Answer


I dont know how familar you are with 4wd but have you tried to put it in 2wh and put the truck in reverse for about 15 to 25 feet?Try that and let me know what happens and sounds you hear.Ill also need to know if you have push button or on the floor.

Apr 27, 2009 | GMC Suburban Cars & Trucks

1 Answer

98 K1500 suburban, can not engage 4wd, HI or Lo runs otherwise

your doing it right but your accuater is bad 59.00 auto zone easy install

Feb 23, 2009 | 1998 Chevrolet Suburban

1 Answer

My 98 chevy blazer won't shift into 4wd.

Most common problem is the vacuum diaphragm that is so inconviently mounted UNDER the battery tray.The cable that locks in the front diff is attached to it and vacuum pulls it in/out.

Dec 22, 2008 | 2000 Chevrolet Blazer

1 Answer

99 Blazer-push button 4wd not working

Make sure that all 4 tires have the same tread on them, if one or more of them are different, then the 4wd may not engage. I had the same problem with my blazer, I changed only 2 tires at a time. The front tires would rotate faster than the rear ones, the gears in the transfer case won't line up right.

Dec 06, 2008 | 1999 Chevrolet Blazer

Not finding what you are looking for?
1996 Chevrolet K1500 Logo

2,205 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

81294 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides