How to check your 4WD system operation 98up Blazers?

Check all vacuum hoses from the intake to the drivers side reservoir can, then to the extra switch (99up) and down to the under battery actuator. Small hose is 5/32 and larger is 7/32”. 2. See if the actuator pulls the front axle cable to engage it. If not and all hoses are good the diaphragm may be leaking on the actuator.

How does the 4WD system work in a Blazers?

If you want 4 Lo the TCCM commands the encoder motor on the transfer case to switch a lower gear in (requires putting the shifter in Neutral and be stopped or only going 2-3mph). Note that if 4 Hi selected no action done in the transfer case.

Is there a push button 4 wheel drive switch?

On my 2000 Chevy 2500 -I have a service 4wd light on my dash and no lights on my push button four wheel drive switch. I have replaced the … read more Automotive Repair/Damage… Chevrolet Express 1500: 99 Chevy express 1500 vortec 350. Starting 99 Chevy express 1500 vortec 350. Starting problem. will start and run fine for several days.

Why are there no lights on my 4×4?

I had the same issue with my zr2 today… so it turns out that is for some reason the 4×4 switch is powered by the interior lights. The drivers door open sensor was broken out of the dash below the fuse panel and I pulled the broken assembly out and got interior lights… and the lights on my 4×4 selector came on for a minute and went back off.

Why are there no lights on the selector switch?

I know this is an old thread but still very informational. On a 99 silverado 5.3 the switch lights would not come on also it was stuck in 2wd.l I replaced the actuator on the transfer case, checked the 4wd fuse in the cab, replaced the switch and the TCCM. Still no lights and no 4wd.

Why does my blazer have a 3 button 4WD vacuum?

If you have a 3 button 4WD, there is likely a vacuum switch on top of the transfer case that is easy to replace. It often fails. Finally, a vacuum leak can be caused by a few other things but they may not be detrimental enough to cause the 4wd to not engage.

Why is my Chevy Blazer not doing 4WD?

While there are other possible reasons why a 4WD system would not engage such as the transfer case encoder motor and computer, the possible reasons I’ve pointed out in this video are quite common and easiest to diagnose. The 4wd vacuum actuator is one of the easiest ways to determine where the problem is on your vehicle.

Is the 4Lo button on a blazer working?

I also now notice (in testing it) that the Auto 4WD, 2HI, and 4HI buttons work, but that the 4LO button just blinks when pushed (in neutral). I have to push one of the other buttons to get out of it.

Is there a problem with my Chevy Blazer 4×4?

Yes my name is kyle and I have a 1999 chevy blazer 4×4 and i have the same tccm problems like everybody else but my only problem is that i need the new 32 pin femal plug and the 4pin female cause my tccm is in working condition. I can’t find then plugs and wires anyplace i know what are odds there.

When did the Chevy Blazer get a V6?

The segment-leading Ford Explorer finally got a new V6 in 1997 that is more refined and powerful than the Blazer’s V6, and it’s sister, the Mercury Mountaineer, has an available V8. That same year, Jeep updated the Cherokee, offering nearly as much interior space as the Blazer and 4WD for around $20,000.

What are the features of a 1999 Chevy Blazer?

On the safety side, the ’99 Blazer now offers a vehicle content theft alarm, flash-to-pass headlamp feature and a liftgate ajar warning lamp. What’s more, a new TrailBlazer trim package is available on four-door versions, featuring monochrome paint with gold accents, unique aluminum wheels, touring suspension and leather-lined interior.

I also now notice (in testing it) that the Auto 4WD, 2HI, and 4HI buttons work, but that the 4LO button just blinks when pushed (in neutral). I have to push one of the other buttons to get out of it.

What to do if your blazer is stuck in 4WD?

A friend of the wifes has a 92 S-10 Blazer that is stuck in 4 low and it won’t go back in to 2wd drive.. So how do you get it to disengage to go back in 2wd drive if the the button doesn’t want to cooperate

How to check your 4WD system operation 98up Blazers?