I have a 2005 Chevy tahoe z71 that has a service 4wd drive light on upon start up and my stability track system is off with the t/c light illuminated on the dash its not showing what drive it is in on the 4wd light panel and now it won't go anywhere when the accelerator is pressed unless the transmission is put into 2 or 1 gear rear wheel drive works to put not drive or gear three, how can I fix the or manually put it into drive?

SOURCE: 03 Chevy Tahoe Z71 - 4wd not functioning

my son has one and his did that and it was a fuse he put a new one in and it is working good now

Joe Lamb

• 463 Answers
• Posted on Mar 27, 2009

SOURCE: 2000 silverado z71 service 4 wheel drive light on/off

The problem is with the front actuator.Its flashing in the dash lights because is not functioning properly.Replace actuator and fix problem.Its a 4 or 3 wire screw in plug in front axle,,

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SOURCE: 2005 chevy silverado 1500, service 4 wheel drive, gears

Sounds like a bent fork in the transfer case. It is a common problem with your truck. The transfer case is a np236. If it just recently started doing this, the rebuild will cost around $800. If the 4wd has been acting up for a while, the planetary will probably need changed, which is another $200.

SOURCE: service 4WD light illuminates on the dashboard message box

this is most commonly a electrical problem, does the speedometer read out correctly? if not it may be depending on if this is a Autotrak model, one f the two speeed sensors, or the acuator on the front diff, put the truck in 4wd, check the front dirveline to make sure it is engaing, if not your problem is in the t-case, if it does then move to the tires, if they are not engaged you have a problem with the actuator.

in most cases i have found the actuall 2wd 4wd switch to be the problem if you find that the switch is acting slow or you need to select the gear a few times before it shifts, then replace it these are very faulty

SOURCE: 1992 chevy k2500 4 wheel drive not engaging

I have a 19934x4 bought it with 4 wheel drive notworking. indicator lights for 4x4 would notlight up but transfer seemed to be shiftin ok. frontaxel woul ot ingauge. I repled the front axel actuator an works fine now no problem. actuator is on the passenger sid back of the front axel pigand has a plug, mine was 2 wireroundpin plug but some have a flat pin 4 wire plug. 70 dollars at NAPA. wasa realy simple replacement didnt even need to jack up the truck. the actuator h a pin that electronically puses out engauging te front axel. a easy test is to put the truck in 4 wheel high. holdthe brak and givei little gas ad havesomeoneelse stand to the side ofthe front of the truck and see if the front axel spins. ifso th actutor is te most likely prblem. hope this helps.

Testimonial: "Ended up being the Actuator. Like you said easy fix and works great. THANK YOU"