1999 Chevrolet Blazer LS 4.3L TCC Module
This Blazer will not stay in 4wd above 10 mph. Above that speed it reverts to 2wd and sets the service 4wd light. It sets speed sensor code, but all three speed sensors show good. Have replaced front speed sensor and swapped the 2 in the back with the same res...
FIX posted 12/7/2009
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Message Closed w/FIX
Vehicle Data1999 Chevrolet Blazer LS
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Message Closed w/FIX
Vehicle Data
1999 Chevrolet Blazer LS
VIN | 1GNDT13WXX |
Engine | 4.3 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI |
Affected | TCC Module |
Conditions | Will Not Stay Engaged Above 10Mph |