Tightening Wheel Lug Nuts
{CAUTION:
Incorrect wheel nuts or improperly
tightened wheel nuts can cause the wheel
to become loose and even come off.
This could lead to a crash. Be sure to
use the correct wheel nuts. If you have
to replace them, be sure to get new GM
original equipment wheel nuts.
Notice:Improperly tightened wheel nuts can
lead to brake pulsation and rotor damage.
To avoid expensive brake repairs, evenly
tighten the wheel nuts in the proper sequence
and to the proper torque speci cation.Tighten the wheel
lug nuts rmly in a
crisscross sequence
as shown.
Used Replacement Wheels
{CAUTION:
Putting a used wheel on your vehicle is
dangerous. You cannot know how it has
been used or how far it has been driven.
It could fail suddenly and cause a crash.
If you have to replace a wheel, use a
new GM original equipment wheel.
400
ApplicationCapacities
English Metric
Manual Transmission – Z51 4.2 qt 4.0 L
Manual Transmission – Z06 4.5 qt 4.3 L
Wheel Nut Torque 100 lb ft
140Y
All capacities are approximate. When adding, be sure to ll to the appropriate level, as recommended
in this manual. Recheck uid level after lling
Engine Speci cations
Engine VIN Code Transmission Spark Plug Gap Firing Order
6.0 L V8 (LS2) UAutomatic
Manual0.040 inch
(1.016 mm)1–8–7–2–6–5–4–3
7.0 L V8 (LS7) E Manual0.040 inch
(1.016 mm)1–8–7–2–6–5–4–3
Engine Data
Engine Horsepower Torque Displacement Compression Ratio
6.0 L V8 (LS2) 400 @ 6000 rpm 400 lb ft @ 4400 rpm 6.0 L 10.9:1
7.0 L V8 (LS7) 505 @ 6300 rpm 470 lb ft @ 4800 rpm 7.0 L 11.0:1
427
