Originally Posted by mjewell
Drove the XUV, hit a few bumps and now the window is up, but the warning light and dinger goes off on most corners and a few bumps, any ideas where to start to look for the loose connection?
Also bought a new switch from the dealer for the tailgate drop down, $28.00 I guess the low price of $16 is no longer available, at least not in NY state.
Take a look at these, take them with a grain of salt as in dont just go replacing 3 latches at once...they would never all fail simultaneously. Note that my defective center switch screwed up the drop gate, window and swing gate latch functions. I replaced it and drop gate now works and window gos up and down from overhead console. I am still chasing intermittent swing gate latching ( I have a new bottom latch and relay I will be installing this weekend)
TSB #3206 -- POWER ROOF AND OR REAR ENDGATE GLASS MAY NOT OPEN CLOSE. *EH (NHTSA ID #10010598, no date provided)
#05-08-66-008: Endgate, Glass or Roof Will Not Operate Properly (Replace Endgate Latches) - (Nov 11, 2005)
Subject: Endgate, Glass Or Roof Will Not Operate Properly (Replace Endgate Latches)
Models: 2004-2005 GMC Envoy XUV
Some customers may comment on any of the following concerns:
• The endgate is hard to close.
• The endgate glass will not open or close all the way.
• The retractable roof will not close all the way.
A build up of dirt or dust on the switch inside the latch may cause this condition.
Replace all three endgate latches with a new robust latch from GMSPO. See SI Document ID # XXXXXXX, XXXXXXX and XXXXXXX for the repair.
Part Number Description
15778433 Latch E/Gate Upper Left Hand
15778434 Latch E/Gate Upper Right Hand
15778435 Latch E/Gate Lower
or this one
#PIT3651: Endgate Electrical Concerns B3966 B3967 - keywords actuator chafe code DTC glass inoperative latch lock performance rear window wire - (Jul 8, 2005)
Subject: Endgate Electrical Concerns B3966 B3967
Models: 2004-2005 GMC Envoy XUV
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
There are 3 known electrical concerns with the endgate.
An XUV may exhibit a condition of intermittent operation of the endgate drop and swing functions. If diagnosis with a scan tool reveals a DTC B3967, the condition may be occurring due to chaffing in the wire harness for the endgate latch actuators.
If a history DTC B3966 has been set, it may be due to an out-of-range condition for the endgate window position that was set during initial cycling of the glass.
If there is a loss of endgate function and loss of Class2 communication with the endgate module, it may be due to a loss of Battery power to the endgate module
Carefully inspect the harness inside the endgate for evidence of pinched or exposed wires. Pinched/chafed wires have been found inside the end gate within approximately 8 inches of the latch actuator connectors for the upper right and/or lower left latches.
This DTC should be cleared and then a Tech 2 endgate re-learn procedure should be performed with the endgate swung open. Then the gate should be closed and window full up and full down operations should be performed followed by other gate functional checks including rear wiper, and drop/swing operations to confirm that the fault condition does not return. If this procedure does not correct the condition then perform the diagnostic procedures in SI and repair as necessary.
3. Circuit 2740 should be checked to see if an open circuit condition exists at the body to endgate connector C900. Look for backed-out or poorly crimped terminals in the connector.
Lastly look at this :
Best of luck, keep us informed, PM me if you need more info. Just understand that this problem is your punishment for desireing to own the BEST of the 300 series GM SUVs---the ENVOY XUV!!!!