Subject: | Navigation Display And Hardkeys Inop/Frozen |
Models: | 2008 Chevrolet Tahoe, Silverado Suburban |
2008 GMC Sierra, Yukon, Yukon XL, Denali, Denali XL |
2008 Hummer H2 |
with Navigation Radio (RPO U3U or UVB) |
2008 SRX RPO |
with Navigation Radio (RPO U2V) |
2008 DTS |
This PI was superseded to change verbiage on concerns and recommendations and the title line. Please discard PIT4698.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Some customer may notice one or all of the following concerns:
In each case, the display will remain in this frozen mode for 3-4minutes. During this time, all audio is functional from the radio and steering wheel controls are operative. All hard buttons on the radio itself are perceived as inop and the touch screen buttons are not accessible. Once the display has "caught-up", other display screens can eventually be accessed and all touch screen functionality is possible. At this time it is possible to eject the Navigation disc.
A quality issue with the supplied map disc may cause one of the above failure modes
If an attempt is made to key off the vehicle and exit the vehicle to power down the radio when it is in its "frozen/stuck" state, the radio will remained powered up for an additional 3-4 minutes before the unit will power down.
If one of the above failure modes is detected:
Note: The disc should be charged back under warranty
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.