GMC Sierra 2500 owners have reported 1 problem related to battery propulsion system (under the electrical system category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of GMC Sierra 2500 based on all problems reported for the Sierra 2500.
(electrical) as an ongoing issue, the dashboard gages/indicators (I. E. Tach, speedometer, etc. . ) will sometimes not register until several minutes after the vehicle has been running (this could be for up to miles) it has not affected vehicle performance to date. (fuel/propulsion system) I have begun having issues where it goes into "reduced engine power". Further diagnostic attempts have led me to believe that it is due to a faulty throttle position sensor (part of the throttle body), tac module, or app assembly (accelerator pedal). Most likely cause may be due to the throttle position sensor, as this issue has happened when the vehicle is on "cruise control". However, due to the inferior design of the throttle body unit itself, the manufacture has made it difficult or if designed to be impossible to replace just the tps, by riveting the tps to the throttle body, and may have to replace the whole throttle body. I am having the vehicle serviced for a complete diagnostic and repair, and will elaborate further upon successful repair if desired.
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all problems of the 2003 GMC Sierra 2500
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