See also:

Footnotes — Maintenance Schedule Additional Required Services — Severe
a) Check all fuel and vapor lines and hoses for proper hook-up, routing, and condition. Check that the purge valve, if the vehicle has one, works properly. Replace as needed. b) Or every four yea ...

Unable to Connect to OnStar Message
If there is limited cellular coverage or the cellular network has reached maximum capacity, this message may come on. Push to try the call again or try again after driving a few miles into ...

Portable Audio Devices
This vehicle may have an auxiliary input, located on the audio faceplate. External devices such as iPod®, laptop computers, MP3 players, CD changers, etc. can be connected to the auxiliary port ...