2005 GMC SIERRA engine

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Page 384 of 574

GMC SIERRA 2005  Owners Manual If you have a 5-speed manual transmission and you are
towing a trailer, it’s better not to use FIFTH (5) gear.
Just drive in FOURTH (4) gear (or, as you need
to, a lower gear).
If you have a 6-speed

Page 385 of 574

GMC SIERRA 2005  Owners Manual 5. If you have a four-wheel-drive vehicle, be sure the
transfer case is in a drive gear and not in
NEUTRAL.
6. Release the regular brakes.
{CAUTION:
It can be dangerous to get out of your vehicle if
t

Page 386 of 574

GMC SIERRA 2005  Owners Manual Maintenance When Trailer Towing
Your vehicle will need service more often when you’re
pulling a trailer. SeeScheduled Maintenance on
page 6-4for more information. Things that are especially
importan

Page 392 of 574

GMC SIERRA 2005  Owners Manual Power Take-Off (PTO)
Before using a Power Take-Off (PTO), if equipped, refer
to the manufacturer’s or installer’s instructions.
To engage a PTO on a vehicle with a manual
transmission do the follo

Page 393 of 574

GMC SIERRA 2005  Owners Manual Preset Mode:PTO speed control mode is used for
stationary applications. (PTO will remain engaged while
mobile in the preset mode, however PTO set and
resume speed controls will be inoperative.) This m

Page 394 of 574

GMC SIERRA 2005  Owners Manual All engine speed values listed above are factory preset
values. With the exception of the TCC lockup speed
(1,100 rpm) and the “tap” increment (100 rpm), all
of these values are programmable and c

Page 395 of 574

GMC SIERRA 2005  Owners Manual Service............................................................5-4
Doing Your Own Service Work.........................5-5
Adding Equipment to the Outside
of Your Vehicle..........................

Page 398 of 574

GMC SIERRA 2005  Owners Manual Service
Your dealer knows your vehicle best and wants you to
be happy with it. We hope you will go to your dealer
for all your service needs. You will get genuine GM parts
and GM-trained and supported