TrailBlazer 4WD L6-4.2L VIN S (2002)
control module damage may occur.
-
If you are performing the pass-through programming procedure using a notebook computer without the power cord, ensure that the internal battery
is fully charged.
AFTER PROGRAMMING A CONTROL MODULE
The powertrain may operate slightly different after a control module software/calibration update. Operating the powertrain through various driving
conditions allows the control module to re-learn certain values. The control module must re-learn the following after a software/calibration update:
-
Fuel trim correction
-
Idle Air Control (IAC) learned position
-
Automatic transmission shift adapts
Other learned values only re-learn by performing a service procedure.
If a control module is replaced the following service procedures may need to be performed:
-
The crankshaft variation learn procedure
-
The engine oil life reset procedure
-
The idle learn procedure
-
The inspection/maintenance complete system set procedure
-
The vehicle theft deterrent password learn procedure
-
The Throttle Position (TP) sensor learn procedure