Manual reads "The DRL system on U.S.
vehicles can also be turned off by using the off/on switch for one ignition cycle. ". Does anyone know what switch they are talking about and where it is?( page 3-16 ).

 

I guess there's a page missing from your owners manual.

Below is from the owners manual right before the part you quoted:

The lever on the left side of the steering column
operates the exterior lamps.
The exterior lamp switch has the following four positions:
2(Headlamps): Turns on the headlamps, parking
lamps, and taillamps.
; (Parking Lamps): Turns on the parking lamps and
taillamps only.
AUTO (Automatic Headlamp System): Automatically
turns on the Daytime Running Lamps during daytime,
and the headlamps, parking lamps, and taillamps
at night.
(Off/On):This position is the momentary Off/On
switch for the Automatic Headlamp System. In Canada,
this only works when the vehicles with an automatic
transmission are in P (Park) and vehicles with a manual
transmission have the parking brake set and the
vehicle is not moving.
When operating in AUTO, a momentary turn of the
switch to off/on will turn off the Automatic Headlamp
System. An AUTO LIGHTS OFF message displays on
the Driver Information Center (DIC) and a chime will
sound. Turning the switch to off/on again will turn
the Automatic Headlamp System back on. An AUTO
LIGHTS ON message displays on the DIC. The
Automatic Headlamp System is always turned on at the
beginning of an ignition cycle for vehicles with manual
transmission.

 

If you are like me and hate drl's, you can just unplug their fuse and be done with it - chevyhhr.net/forums/showthread.php?t=18336