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SILVERADO
ENGINE/SUSPENSION AVAILABILITY
Autotrac 4x4 System
The available Autotrac 4-wheel-drive system on 1500 and 1500HD models allows you to
choose an automatically controlled 4-wheel-drive mode, or traditional 2HI, 4HI, Neutral and
4LO
functions – all at the touch of a button. This is the only automatic 4-wheel-drive system
available
in full-size pickups today.*
AUTOTRAC 4X4 SYSTEM OPERATION
• AUTO 4WD detects rear-wheel slippage
and automatically engages 4WD as road
conditions dictate.
• 2HI is the 2WD setting for most driving conditions and optimal fuel economy.
• 4HI is a full-time 4WD mode for snow, ice, rain and most off-road conditions.
• 4LO is the low-speed 4WD setting for extreme conditions, such as steep hills,
deep sand, mud or snow.
• NEUTRAL is also provided with the Autotrac system, permitting flat towing.
*Based on 2005 Model Year data for GM Large Pickup segment and latest available competitive information
at time of printing. Excludes other GM vehicles.
Suspension Packages
A variety of suspension packages are available on Silverados, providing ride characteristics tailored to your
particular needs.
1500 MODELS
• Standard Suspension (Z83) – 35 mm Twintube shock absorbers on 2WD models except LT Extended Cabs.
• Heavy-Duty Suspension (Z85) – Standard on all 4x4s and LT Extended Cabs with Monotube
36 mm shocks for increased damping to improve handling and trailering.
• Ride Control (ZX3) – Optional on LS and LT 2WD and 4x4s. Manually adjusts the amount
of shock absorber
damping using a two-position
switch for smooth road or increased control and
trailering.
• Off-Road (Z71) – Includes 46 mm shock
absorbers, special jounce bumpers and stabilizer bars, skid plates,
high-capacity air cleaner and
Z71 decals. Available on LS and LT 4x4s only.
1500HD, 2500HD AND 3500 MODELS
• Heavy-Duty Suspension (Z85) – Provides good carrying and trailering capabilities. Standard on these models.
STANDARD & OPTIONAL ENGINES
Series Cab Type Model Vortec 4300 V6
1
Vortec 4800 V8
2
Vortec 5300 V8
3
Vortec 6000 V8
4
VortecMAX V8
4
Vortec 8100 V8
5
Duramax 6600 V8
5
Number 195 hp @ 4600 rpm 285 hp @ 5200 rpm 295 hp @ 5200 rpm 300 hp @ 4400 rpm 345 hp @ 5200 rpm 330 hp @ 4200 rpm Turbo Diesel
260 lb.-ft. torque 295 lb.-ft. torque 335 lb.-ft. torque 360 lb.-ft. torque 380 lb.-ft. torque 450 lb.-ft. torque 360 hp @ 3200 rpm
@ 2800 rpm @ 4000 rpm @ 4000 rpm @ 4000 rpm @4000 rpm @ 3200 rpm 650 lb.-ft. torque
@ 1600 rpm
1500 Regular Cab C15703 S O O – – – –
C15903 S O O – – – –
K15703 S O O – – – –
K15903 S O O – – – –
Extended Cab C15553 – – S – – – –
C15753 S O O – O
6
––
C15953 – S O – – – –
C15753/SS – – – _ S – –
K15553 – – S – – – –
K15753 – S O – O
6
––
K15953 – – S – – – –
Crew Cab C15543 – – S – O
6
––
C15543/Cheyenne – S – – – – –
K15543 – – S – O
6
––
K15543/Cheyenne – S – – – – –
1500HD Crew Cab C15743 – – – S – – –
K15743 – – – S – – –
2500HD Regular Cab C25903 – – – S – O O
K25903 – – – S – O O
Extended Cab C25753 – – – S – O O
C25953 – – – S – O O
K25753 – – – S – O O
K25953 – – – S – O O
Crew Cab C25743 – – – S – O O
C25943 – – – S – O O
K25743 – – – S – O O
K25943 – – – S – O O
3500 Regular Cab K35903 – – – S – O O
Extended Cab C35953 – – – S – O O
K35953 – – – S – O O
Crew Cab C35943 – – – S – O O
K35943 – – – S – O O
1 – A 5-speed manual transmission is standard in Regular Cabs. A 4-speed automatic transmission is optional. 2 – A 5-speed manual transmission is standard. A 4-speed automatic transmission is optional in most models, standard
in models indicated with (S).
3 – A 4-speed automatic transmission is required and is standard in 1500 Crew Cabs.
Aluminum block 5300 V8, available on 1500 Extended Cab 4x4s, produces 310 hp @ 5200 rpm.
4 – In models equipped with a Vortec 6000 V8, a heavy-duty 5-speed manual
transmission is
standard. A heavy-duty 4-speed automatic transmission is optional. 5 – A 6-speed ZF manual transmission is standard. A 6-speed Allison 1000 automatic transmission is optional. Duramax 6600 V8 Turbo Diesel with 6-speed manual transmission
produces 300 hp @ 3000 rpm and 520 lb.-ft. of torque @ 1600 rpm.
6 – Available with VortecMAX Performance Package or Silverado Performance Edition (on Ext. Cab 2WD model only). NOTE: Some models
with up-level trims and the 1500 and 1500HD
Crew Cabs include a 4-speed automatic transmission. Some up-level series include a larger engine than those indicated on this chart. Ask your Sales Consultant for details.
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