Question about 2003 Chevrolet Silverado 2500HD

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03' silverado 2500hd ex. cab. DDM works speraticly given three options. Case one is D. window dead and all other switches work. Case two D.window functions normaly and locks,mirrors and pass. window dead. OR Case three d. window dead, lock work, and passenger window "DELAYED", speratic. Pulled a "communication error with DDM code". Is this a bad DDM or BCM flash issue?

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I own a 2500 hd 4 door and my windows ,mirrors,doorlocks all started working slow and sometimes not at all. I Replaced the master control switch (driver side controls) and all is fine now.

Posted on Oct 15, 2010

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Rpm gauge, speedometer, & other gauges completely erratic. 2003 Chevrolet 2500HD, Duramax engine, Allison Transmission. 4WD Crew Cab, Long Bed


This model always this problem, usually after about 90,000 miles and the other instruments will eventually follow. There are companies that will repair this for you just use google (instrumentclusters.com) to find them. I was charged 185.00 for the repair... GM wanted over 500.00!

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then it might be the motor to that window or a bad switch for that window.

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REMOVE THE DOOR PANEL TO GET TO THE WINDOW MOTOR. REMOVE THE CONNECTOR ON THE MOTOR. LOOP A TEST LIGHT FROM BOTH TERMINALS. WITH THE KEY ON AND BOTH SWITCHES IN PLACE, CHECK TO OPERATION OF THE SWITCHES. IF THE LIGHT COMES ON IN BOTH DIRECTION THE WINDOW MOTOR IS BAD.

THERE IS A CIRCUIT BREAKER BUILT INTO THE WINDOW MOTOR. SOMETIME HITTING THE MOTOR WITH MAKE THE CIRCUIT BREAKER RESET BUT THE MOTOR WONT LAST LONG DOING THAT.

ALSO TRY PULLING DOWN ON THE WINDOW WHILE TRYING THE SWITCHES. THE WINDOW COULD JUST BE STUCK. THIS HAPPENED TO ME.

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1 Answer

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You have a bad ground re test the trailer connection's

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