1999 GMC Sierra 1500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 GMC Sierra 1500
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1999 GMC Sierra 1500 Problems4WD Transfer Case Position Sensor/Selector Switch May Fail
The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed.
One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.
It is common for the fuel level sensor in the fuel tank read the fuel level incorrectly. The sensor must be replaced to correct the condition. Our technicians recommend having the complete fuel pump module replaced on high mileage vehicles.
1999 GMC Sierra 1500 QuestionsMy truck will crank over but not start.And my (service engine soon) is on. (1 answer)
Stalls out immediatley dies.Wont stay running!No trouble codes!