GMC Sierra
GMC Sierra

See also:
Tire Designations
Tire Size
The examples show a typical passenger vehicle and light truck tire size.
Passenger (P-Metric) Tire
(A) Passenger (P-Metric) Tire:
The United States version of a metric tire sizing syst ...
Tow/Haul Mode
(Tow/Haul): The vehicle may have a Tow/Haul mode.
The button is located on the instrument panel under the climate controls.
Push the button to activate the system. Push it again to deactivate the s ...
Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position.
• The ignition should turn to LOCK/OFF only when the shift lever is in P (Park).
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