What parts do I need to fix my 2004 GMC Envoy XUV's tailgate door? It will not open. It opened once a month ago, at a thrift store. but not since. Window works just not the tailgate. Help! TY
The endgate uses an electrical latch system. The latch system contains 3 separate electrical latches that are located on the upper left corner, upper right corner, and lower left corner of the endgate. The latches latch when battery voltage is removed. The latches will unlatch, or release when battery voltage is applied. The latches work in conjunction with a dual pivoting hinge located on the lower right corner of the endgate to allow the endgate to swing open from the left to right for access and cargo loading, or to drop to extend cargo space.
Do you know what diagnostic trouble code's are ? An electronic control module controls the unlocking of the tail gate an when problems like not opening happen ,DTC'S set in the endgate module ,pointing to the problem . Need sophisticated diagnostic tool to check it .
The endgate control module supplies voltage for the endgate latch relay coil control circuit to the endgate latch relay. This output is used to energize the endgate latch relay when an endgate swing latch or drop latch request has been made. If the endgate module detects an open or short to ground on the endgate latch relay coil control circuit when a swing latch or drop latch request is made, a DTC is set.
Remove the endgate latch relay.
Connect a test lamp between the endgate latch relay coil control circuit of the endgate latch relay connector and a good ground.
Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, command the endgate module to swing endgate.
Does the test lamp illuminate?
The endgate module monitors the lower left endgate latch actuator and upper right endgate latch actuator circuits. When the endgate module detects an open or short to ground on the lower left endgate latch actuator and upper right endgate latch actuator circuits, a DTC is set.
You could try replacing the endgate latch relay . Do you know what a relay is ? Video's on youtube showing how they work an how to test . The only thing is , the relay is inside the endgate ,need to take trim panel off .Video's on youtube for that too , probably .
Sep 27, 2017 |
GMC Cars & Trucks