GMC 2003 Sierra - Manual (Page 117)

If /our vehicle has both tow/haul arxJ overcfrive disable
lap the button once to enable or disable tow/haul,
and press and bold Ihe button to enable or disable
Overdrive disable.
Manual Transmission Operation
Five-Speed {VORTEC 6DD0 V8 Engine)
Here's how to operate your
irabsntfs&lûb.
FIRST {11 IS Indended onty for heavy loads or trailer
towing and is nol recommended for normal dnving.
During the first 500 miles {905 kin) of vehicta use, stad
your vehicle moving In FIRST {1). This allows clutch
components to hreak-in properly.
FIRST {11: Pre&a the dutch pedal and shift into
FIRST (ij. Then, slowly lei up on the clulch pedal as
you press the accaierator pedal. Shift into FIRST (T)
only when the vehicle is below 5 mph {8 kirt/h). If you fry
to shift down Into FIRST [1} at fi}(cessive vehicle
speeds, the shift lever wilt nol move into FIRST (1) until
vehicle speed is reduced.
SECOND (¿J: Press the dutoh pedal and shift into
SECOND (2). Then, slowly let up on ihe dutch pedal as
you press the accetoTStor pedal.
You can shift into SECOND {2) when youTe going less
than M mph (35 km/h). If you've come to a complete
stop and it's hard to shift into SECOND (2)„ pul Ihe shift
lever into NEUTRAL and fel up on the dutch, press
tha dutch pedal hack down. Then shift into
SECOND [2). If you Ijy to downshift into SECOND
{2} at
excessive vehicle speeds, the shift lever will not move
into the SECOND (2) position until the vehicle speed
Is reduced.
THIRD {3): Press the efutth pedal and shiff into
THIRD (3). Then, slowly let up or^ the clutch pedal as
you pres$ the accelerator pedal.
FOURTH (4) and FIFTH (5): Shift into the higher
forward gears Ihg same way you do for THIRD (3).
Slowly let up on the clutch pedal as you press tho
accelerator pedal.
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