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Tahoe troubleshooting hey have a 99 chev tohoe 4 wheel the 4 wheel was working great went in the ditch and got out then it stop working. no noice or nothing have check the fuse's and they are ok. can still drive it ok just no 4 wheel heck the codes in the on board and not showing anything, but when i pulled the fuse and put it back in it flash 3 times then nothing do you have any idea what i can check

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Look under the vehicle for any loose wires that may have ripped loose when getting out of your original predicament.. mostly near the bottom of the transmission/transfer case..

Posted on Dec 25, 2013


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

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Posted on Jan 02, 2017

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SOURCE: 4 wheel drive not working

Vacume lines or vacume switch on transfer case,or vacume pod to front axle.

Posted on Jan 07, 2009

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SOURCE: Car runs greAt BUT FLASHES LITE PO300 P1781

P0300 is a random engine misfire code. P 1781 is a transmission code, but it refers to a malfunctioning engine speed signal (crankshaft angle sensor). A bad crankshaft angle sensor or camshaft angle sensor can cause the P0300 code. A large list of items can cause a P0300 code, but since you have both, I'd be checking the crankshaft angle sensor and the related circuit. Sometimes, the mounting screws loosen up, which can cause the sensor to not function properly, all the time. Get this fixed, because over a period of 4 to 6 months, this can destroy the catalytic converter in the exhaust system ($$$$)

Posted on Jun 14, 2009

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SOURCE: My 98 s10 is stuck in 4 wheel drive low.

Pull the kick panel on the passenger side. there is a small box mounted there that is the computer that controls the actuator for the 4wd system. this is notorious for problems due in fact that the connector likes to pull out and away from the module. I had the same problem and the solution is simple.. take a long zip tie and get it between a few of the wires and around the module. tie it in and have a nice day.. it wont come off or try to pop out anymore and you should have no issues getting into 2wd, 4wd h, 4wd L.

Posted on Jun 21, 2009

  • 14445 Answers

SOURCE: Won't shift out of 4 wheel drive low

modulator stuck or damaged located at transfer case take a rubber mallet and hit around where modulator and case connect than try to shift again if nothing than un bolt and lube and move actuator rod, with out try to move electronically w/switch back to 2 wheel drive -if moves should work can replace but look for replacement as back up if happens again just change over

Posted on Oct 05, 2009

  • 750 Answers

SOURCE: Holden rodeo 99 3.2v6 4l30e code 82 and going into limp mode

the tcm may be faulty or has a loose ground, try swaping in another if you can get one borrowed or a cheap used one from a salvage unit

Posted on Oct 30, 2009

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99 chev pu failed inspeciton - mil did not come on

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1 Answer

99 tahoe stuck in 4 low. it went to 4 low by itself. tccm makes a cliking sound when truck is started.

The 4 wheel drive system has 3 main parts. The switch on the dash,the encoder motor which is on the transfer case, and the TCCM or transfer case control module. If you keep it simple, the only one of these parts that can make the transfer case do something by it's self is the TCCM. However, the most replaced part at my shop is the encoder motor.
Have someone do a diagnostic check and see what codes are present. If it is a C0327 DTC, it is the encoder motor circuit malfunction. If a C0374 code is present, it's the TCCM.

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When it shifts to third does it just feel like neutral? If yes it will need rebuilt again, you hurt the 3/4 clutch.

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i own a 1996 and it's manual says you can shift on the fly with no problem.........if there was a noise accompanying the shift to 4hi i would be concerned but if it just went in and you were able to shift it out with no problems i would not worry
hope this gives you a little peace of mind!

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