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How do you find the problem with a 99' chevy blazer ...

Sent to Car Experts January 20 09:47 AM

How do you find the problem with a 99' chevy blazer whose 4WD engages by itself? mechanics ahve check the actuator and module and it has on occasion said "four wheel drive needs servicing" on the dash. WE just bought it with 58k miles on it and bought it thinking they had fixed the problem. it had shown up during a few days we had took it home to drive before we bought it.Optional Information: 1999 Chevrolet s-10 Blazer 4.3Already Tried: dealer, car .they the dealer have checked the actuator and module

Edited by Customer (name blocked for privacy) on January 20 2006 at 9:50 AM

Customer (name blocked for privacy)
Status:  Closed   Value: $8
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January 20 12:30 PM (2 hours and 42 minutes and 50 seconds later)
         
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Davo -- Master technician -- 99% Positive Feedback on 1943 Car Accepts
ASE Master Technician/Advanced Automotive Diagnostic Technician
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January 20 2:24 PM (1 hour and 54 minutes and 2 seconds later)
         
DO YOU ALSO KNOW IF THIS IS A COMMON PROBLEM WITH BLAZERS? THE DEALER TOLD MY WIFE THEY WOULD SPLIT THE COST, BUT THERE IS NO WAY SINCE WE BOUGHT THE VEHICLE ASSUMING THEY FIXED THAT PROBLEM. SOMETIMES YOU START IT UP AND ALL THE 4WD BUTTONS STAY LIT. IT HAS A FEW OCCASIONS STAYED IN 4WD AND MADE IT SLUGGISH AND THE TACH GOES A LITTLE CRAZY.
Customer (name blocked for privacy)
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January 20 3:13 PM (48 minutes and 42 seconds later)
         
ACCEPTEDCheck Mark

just a little input has anyone pulled codes out of it? i have seen this many times a have seen them go into 4 low on the highway from bad encoder motors stitches fail module thinks its in a different range and automatically shifts \

does it have an auto button or just 2 hi 4 hi 4 low buttons?

Dan -- Auto Service Technician -- 97% Positive Feedback on 159 Car Accepts
master tech
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January 21 7:39 AM (16 hours and 26 minutes and 12 seconds later)
         
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Davo -- Master technician -- 99% Positive Feedback on 1943 Car Accepts
ASE Master Technician/Advanced Automotive Diagnostic Technician
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