Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Chevy

2002 Chevy Trailblazer: the 4-wheel drive..engaging..dashboard..GM

Customer Question
2002 Chevy Trailblazer - we...
2002 Chevy Trailblazer - we had an issue with the 4-wheel drive not engaging, thought it was the dashboard activator switch. Took it to the dealer, it wasn''t the switch. They called GM, had to "ping" something to get it to work, advised we might need a new encoder motor. Got it back, next day we were hearing a "clicking" noise in the front end. Fooled around with the switch. As long as we ran in 4-wheel high, no noise. Mechanic friend advised to unhook the encoder motor, making sure we were in 2-wheel drive. Switched to 2-wheel drive. With some difficulty reaching the connector, got it unhooked. Took it for a drive. Now it makes noise irregardless of where the setting is and obviously no lights on switch to indicate if it''s in 2-wheel drive. Looking for some guidance.
thanks
frustrated in Vermont with no 4-wheel drive
Submitted: 9 years ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 2 hours by:
5/26/2008
Chevy Mechanic: frank, Chevrolet Technician replied 9 years ago
frank
frank, Chevrolet Technician
Category: Chevy
Satisfied Customers: 3,420
Experience: 33 years experience,24 years of Chevroler/GM experience and training .ASE Recertified Master Tech,
Verified
They transfer case module willset a code with a fault-it there is no code and the switch indicator bulbs are out,the transfer case module has a logic lock up.You pull the atc fuse under the hood for 1 minute and reinsert it.If a c0550 sets you need a transfer case module,Once you get the transfer case to shift you can diagnose the next problem,The encoder basically replaced the hand lever to shift it-the position sensors go bad in it along with the lock that holds it in a range-the front axle has a actuator that the module command s on in auto or 4x ranges.As it is you have a control issue and after disconneting and playing with things a second problem has occured that may correct itself once you get things to function correctly.
Ask Your Own Chevy Question
Customer reply replied 9 years ago
Reply to frank's Post: So, do I need to plug the encoder motor back into the system before I pull the fuse? I was trying to allow it to stay in 4-wheel drive until we could afford to have the motor replaced.
Is the motor replacement something that can be done without a diagnostics check? I don't have a unit to check codes.
Chevy Mechanic: frank, Chevrolet Technician replied 9 years ago
The most comon problem is the control module and the replacement has to be programed to you vehicle after replacement.Connect the encoder and pull the fuse-you are going to have to have acces to a scanner that can read the transfer case module codes.Doing anything with out reading codes could wind up costing you for a needless part and the encoders go for $600
frank
frank, Chevrolet Technician
Category: Chevy
Satisfied Customers: 3,420
Experience: 33 years experience,24 years of Chevroler/GM experience and training .ASE Recertified Master Tech,
Verified
frank and 87 other Chevy Specialists are ready to help you
Ask your own question now
Ask frank Your Own Question
frank
frank
frank, Chevrolet Technician
Category: Chevy
Satisfied Customers: 3,420
3,420 Satisfied Customers
Experience: 33 years experience,24 years of Chevroler/GM experience and training .ASE Recertified Master Tech,

frank is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,289 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,357 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,866 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

2,918 satisfied customers

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

Ron Z.

Ron Z.

- Chevy Tech -

2,734 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
Its odd i just pulled into a liqour store to grab some
Its odd i just pulled into a liqour store to grab some smokes and now thr car wont start it just makes like a bzzzzzzz sound with the clutch in and key turn … read more
Randall
Randall
Auto Technician / Consultant
Vocational, Technical or Trade Scho
69 satisfied customers
Is there a specific measurement from crank sensor to crank
is there a specific measurement from crank sensor to crank ring? My cover to ring measures .870 The sensor measures .715 … read more
AutoDoc
AutoDoc
Shop Owner
Bachelor's Degree
1 satisfied customers
We have a 1985 chev s 10 pick up it is not firing just
hello we have a 1985 chev s 10 pick up it is not firing just turning over .we have replaced the spark plugs and rotary button the cap and pick up motinaclure under distributor … read more
AutoDoc
AutoDoc
Shop Owner
Bachelor's Degree
1 satisfied customers
REPLACED A DAMAGED TDM (THEFT DETERRENT MODULE) IN MY 99
REPLACED A DAMAGED TDM (THEFT DETERRENT MODULE) IN MY 99 CHEVY TAHOE AND NOW MY SECURITY LIGHT IS ON SOLID. RELEARN PROCEDURE NOT WORKING, ALSO SCANNER SHOWING NO COMMUNICATION. THEFT MODULE IS USED F… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
Major oil leak from just above the axle on drivers side.
Major oil leak from just above the axle on drivers side. Can't figure out where it's commuting from … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
2013 avalanche. Metal rattling noise under engine when
2013 avalanche. Metal rattling noise under engine when starting up cold. Decreases when giving it gas or driving for a minute. … read more
roy
roy
Associate Degree
3 satisfied customers
03 duramax started missing to the point of shutting down but
39;03 duramax started missing to the point of shutting down but will start again and idle with no problem as soon as in gear and accelerator pushed it will again start missing ignition. … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
I have a 2005 Chevy 3500 Duramax. Today I cranked it then
Hello. I have a 2005 Chevy 3500 Duramax. Today I cranked it then was reaching back to grab my seatbelt and the truck died. It will turn over but will not crank. Do you think this is something with my … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
I have a 2006 Trailblazer 5.3 L as the engine is running it
I have a 2006 Trailblazer 5.3 L as the engine is running it loses oil pressure replace the oil pump o-ring on pickup tube replace sensor and Screen under sensor but it is still losing oil pressure as … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
My Engine Coolant Hot signal came on and I was checking to
Hi. My Engine Coolant Hot signal came on and I was checking to see what the problem might be. It has happened twice, but the first time, the temperature gauge went back to normal after a few minutes. … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
I just install a rebuilt BBC in my 1980 corvette. and was
I just install a rebuilt BBC in my 1980 corvette. and was wantinginfo on steps on tuning. I have a CS-1047M cam and cant find any info on it. Do I just tune it like a stock 454 … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
01 chevy Tahoe 4wd barn doors, driver side rear running
01 chevy Tahoe 4wd barn doors, driver side rear running light isn't working after attempted led conversion . Help?… read more
Mechanic01
Mechanic01
1,724 satisfied customers
I have a 2003 gmc with 4.8 engine. Codes show lean on both
I have a 2003 gmc with 4.8 engine. Codes show lean on both banks and replace mas. Have checked for leaks, smoke test intake gasket, checked fuel pressure and everything within spec. Start good on cole… read more
Gabriel Grey
Gabriel Grey
Master Service Technician
Associates
375 satisfied customers
Stalling. No light on..cars stalls after warming up. Stalls
No light on..cars stalls after warming up. Stalls at lights after idling … read more
Tim&#039;s Auto Repair
Tim's Auto Repair
mechanic
High School or GED
8,866 satisfied customers
I have a 2012 Chevy Cruze the more door actuator has went
I have a 2012 Chevy Cruze the more door actuator has went out, my heat works but it will not come out my defrost. What would be the average estimate to get this fixed? And would they have to take the … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
I change the spark plugs I change the wires I change all
I change the spark plugs I change the wires I change all three coils I changed the gas card and I still getting the same code po300 lot of people is telling me that he could be the ignition module at … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,420 satisfied customers
I have a 05 silverado I had a code for mass airflow sensor
I have a 05 silverado I had a code for mass airflow sensor so I replaced it. Also did plugs and wires had a misfire. Before I did this my truck would intermittently stall out and sometimes not start b… read more
vwtech0405
vwtech0405
VW Technician
Associate Degree
8,868 satisfied customers
It won't start on occasion. And no. We've checked the
Yes and no. We've checked the grounding wire, the purge valve, had it hooked to a computer and the only code it gave out was one for a misfire … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
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.

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.

Show MoreShow Less

Ask Your Question

x