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The 4WD does not engage. the Selector switch is not
The 4WD does not engage. the Selector switch is not engaging. … read more
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Pete
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Vocational, Technical or Trade Scho
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I drove another 50 miles and all the codes came back. I am
I drove another 50 miles and all the codes came back. I am checking all the grounds and removing the frt. differential activator and see if I can push the shift fork manually.… read more
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On my 03 trailblazer the 4x4 isn't working. I got about 15
On my 03 trailblazer the 4x4 isn't working. I got about 15 codes. U1048,U1016,U1024,U1026,C0300,C0305,C0306,C0321,CC0327,C0359,C0370,B0770,B0775,B0780,B0785,B0790,B2725,U1000,P0495,P0420,P0128,P1345. … read more
Chad Farhat
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My 2004 gmc 1500 4x4 5.3 engine service 4wd light is on and
My 2004 gmc 1500 4x4 5.3 engine service 4wd light is on and the switch to select 4wd not lit up at all I have replaced Tccm and encoder motor? Nothing. Do you think the actuator on front end is bad? … read more
Reggie Whiddon
Reggie Whiddon
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Got 2003 chevy trailblazer with a ton of codes, don't even
got 2003 chevy trailblazer with a ton of codes, don't even know where to start, vehicle loses electrical power intermittently codes c0291, c0281, c0267, c0226, c0222, u1255, u1191, u1031, u1144, u1240… read more
AMEDEE
AMEDEE
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2004 chevy 2500hd 6.6 turbo diesel. 4x4 low does not work
2004 chevy 2500hd 6.6 turbo diesel. 4x4 low does not work indicator just blinks when you try to engage. 4high seems to work fine has code c0359… read more
GM Tech (Cam)
GM Tech (Cam)
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Vocational, Technical or Trade Scho
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My 2004 trailblazer has 160K miles on it. it was 90 degrees
My 2004 trailblazer has 160K miles on it. it was 90 degrees and I was waiting at a stoplight , the car car died on me , I tried to restart but it would not and it didn't sound normal , like it did not… read more
Gary
Gary
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Chevrolet Trailblazer LS: My check engine light came on today
My check engine light came on today in my 2004 Trailblazer LS. I stopped at advance auto parts to have the code read and it turns out to be 20 codes. I just bought it less then a month ago and have ar… read more
Randall
Randall
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Chevrolet Silverado 2500 HD LS: 2003 SILVERADO 2500HD. 4X4
2003 SILVERADO 2500HD. 4X4 NOT WORKING. SELECTOR SWITCH IN DASH (NO LIGHTS). NEW ENCODER MOTOR WAS NOT RECOGNIZED. CODES: U1009, U1000, U1255,U1301,C0306,C0327,C0359,C0379,C0550,B0790,B2725. ANY THOUG… read more
Gary
Gary
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Vocational, Technical or Trade Scho
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dealership..diagnostic..Ignition light/4WD Service in the dashboard
Avalanche 2006 Z71 just came from the dealership with the following error codes: P0608/P2A04 C0306/C0379/B0790/U1016/U1041/U1064/U1301 Vehicle went in for a complete diagnostic because the Ignition li… read more
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Chevrolet Tahoe 4X4: -service 4 wd light comes on randomly..lights lit
1GNEK13Z63J302169 2003 Chevrolet Tahoe 4X4 --service 4 wd light comes on randomly --last time vehicle was in Auto 4wd, it went to 2wd by itself, all lights lit up for 4wd selection at the same time, t… read more
AMEDEE
AMEDEE
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2003 Chevy S10: engage..local mechanic..4WD selector module..console
I have a 2003 Chevy S10 LS 4.3 4WD. It will not engage 4WD. I brought it to a local mechanic and he replaced the 4WD selector module (2hi, 4hi, 4lo) in the console. That did not fix the problem. Befor… read more
Eric
Eric
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2000 suburban: selector..intermittent..transfer case..light comes
I have 2000 suburban LT, 4wd: auto 4wd, 2hi, 4hi, 4lo. The indicator lights on the selector are intermittent but the transfer case evidently works since the selected mode is engaged. Once in a while t… read more
Hal
Hal
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Vocational, Technical or Trade Scho
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Transfer case ''failed to shift'' error code C0387. 4WD
Transfer case ''failed to shift'' error code C0387. 4WD started failing to work sometimes. took in to mechanic and got no error codes, replaced push button switch in dash... seems to be a common probl… read more
Tim's Auto Repair
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2001 chevy blazer: already replaced..neutral push and release..steady
2001 chevy blazer 4.3 liter 4wd won't work already replaced aculator seems to be working properly can hear it making noise like its going into 4wd but it still doesn't work the 2hi button lights up fi… read more
Dan
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2004 Chevy: DTC..The indicator lamps..control module..mount
2004 Chevy Silverado DTC C0306, C0321 & C0327 The indicator lamps on the 4x shift switch are not illuminated and do not respond. I have checked power at the control module and the encoder as well as v… read more
msarles1
msarles1
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2000 chevy: reg cab short box with a 5.3 auto w/tow option.
I have a 2000 chevy silverado ls. reg cab short box with a 5.3 auto w/tow option. it has 133000 miles. I have had the truck for about 2 years and have had a problem with the 4wd since I've owned it. t… read more
frank
frank
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2000 Chevy: Z71..it through 2wd, 4hi, 4lo, AWD..light went..next time
I have a 2000 Chevy Silverado Z71 with ATC. Recently the Service 4WD light came on so I cycled it through 2WD, 4HI, 4LO, AWD and back to 2WD and it worked fine and the light went out but only for a da… read more
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Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,659 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,642 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,884 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,953 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,836 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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