Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems.
It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System.
If a diagnostics check is needed between e-mails, push 
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Advisor can run a check.
See also:
Starting the Engine Using Remote Start
To start the engine using the remote
start feature:
1. Aim the transmitter at the vehicle
and press and release on the
transmitter.
2. Press and hold for at least
four seconds or until the ...
Current and Past Models
Technical Service Bulletins and
Manuals are available for current
and past model GM vehicles.
ORDER TOLL FREE:
1-800-551-4123 Monday – Friday
8:00 AM – 6:00 PM Eastern Time
For Credit Card Or ...
Power Seat Adjustment
To adjust a power seat, if equipped:
- Move the seat forward or
rearward by sliding the
horizontal control forward or
rearward.
- Raise or lower the front or rear
part of the seat cushion ...