Alpine SPT-31GM User Manual
SPT-31GM
Speaker System for
Chevrolet/GMC
Installation Manual
Model: Select GM Trucks and SUVs
Model Year: 2014-up Trucks
Compatible Vehicles*
Year Model Configuration Trim
Chevrolet
2014-up Silverado 1500
Silverado 2500HD Double/Crew Cab WT, LT, LTZ
Silverado 3500HD Double/Crew Cab WT, LT, LTZ
Double Cab WT, LS, Custom, LT, LTZ
Crew Cab WT, LS, LT, LT Z71, LTZ, LTZ Z71
Chevrolet/GMC
FULL SIZE TRUCK 1/14
GMC
* The specified vehicles have been tested and have met compatibility specifications at the time of testing.
Compatibility is not guaranteed if the manufacturer has made production changes to the vehicles listed above.
Factory systems equipped with Bose are not compatible with this system.
2014-up
Sierra 1500 Double/Crew Cab Sierra, SLE, SLT
Sierra 2500HD Double/Crew Cab Sierra, SLE, SLT
Sierra 3500HD Double/Crew Cab Sierra, SLE, SLT
Introduction
Design and specifications are subject to change without notice for improvement.
To Ensure Safe Use, Always Follow These Precautions
The installation of this product requires specialized skills and experience. We recommend that you have the
product installed by an authorized Alpine dealer.
Before you use this product, be sure to carefully read this installation manual and the separate user's manual
so that you can use the product correctly. Alpine Electronics bears no responsibility for problems that arise as
a result of failure to follow the instructions in the manuals.
This manual includes a number of symbols that are intended to help you use the product safely, to prevent
harm to you and others, and to protect against damage to property. These symbols and their meanings are
listed below. Make sure you fully understand these symbols before you begin reading the main text.
Explanations of Injury and Damage That May Result from Incorrect Use
Warning
Caution
Ignoring the content marked by this indication and using the product incorrectly is
expected to lead to death or serious injury.
Ignoring the content marked by this indication and using the product incorrectly is only
expected to lead to injury or property damage.
Types of Precautions
Chevrolet/GMC
FULL SIZE TRUCK 2/14
Forbidden
Forbidden
Indicates actions that are forbidden
(must not be performed)
Mandatory
Indicates that disassembly is
forbidden.
Indicates actions that are
mandatory (must be performed)
Marks content that should receive
your full attention.
Warning
Do not disassemble or modify the product. Doing so could lead to an accident, re,
or electric shock.
Forbidden
Store screws and other small objects where small children cannot reach them. If one of these
small objects is swallowed, consult with a doctor immediately.
When replacing fuses, be sure to use fuses with the specied current rating. Failing to do so could
lead to an accident or re.
Forbidden
Mandatory
Only connect the product to a 12 VDC negative ground car. Failing to do so could lead to
an accident or re.
Before you begin wiring, remove the ground wire from the negative terminal of the battery.
Failing to do so could lead to electric shock or injury.
Do not cut the insulation on a cord and take power from another device. Doing so could
lead to re or electric shock.
Do not install the product in a location where it will obstruct the driver’s forward view;
interfere with the operation of the steering wheel, gearshift, or the like; or pose a
threat to passengers. Doing so could lead to an accident or injury.
Mandatory
Forbidden
Forbidden
Chevrolet/GMC
FULL SIZE TRUCK 3/14
When making a hole in the vehicle body, be careful to avoid damaging pipes, the fuel tank,
electrical wiring, and the like. This kind of damage could lead to an accident or re.
When installing and grounding the product, do not use any of the bolts or nuts of the
steering wheel, brakes, fuel tank, or the like. Doing so could make the brakes stop working
or lead to re.
Do not install the product near the passenger-side airbag. Doing so could interfere with the
operation of the airbag and lead to an accident or injury.
Bundle cords so that they don’t interfere with driving. Wrapping cords around the steering
wheel, gearshift, brake pedal, or the like, could lead to an accident or damage equipment.
Forbidden
Forbidden
Caution
Connect the product properly according to the instructions. Failing to do so could lead
to re or an accident.
Do not sandwich cords between the seat railing or allow them to touch protrusions.
Resulting breaks or shorts could lead to electric shock or re.
Do not block vents or heat sinks. Doing so could lead to re or damage equipment.
Use the accessories according to the instructions, and attach them securely.
Failing to do so could lead to an accident or damage equipment.
Do not install the product where it may be exposed to water or in a place with high levels
of humidity or dust. Doing so could lead to re or damage equipment.
Forbidden
Forbidden
Forbidden
The installation and wiring of this product requires specialized skills and experience.
Have the product installed and wired by an authorized Alpine dealer.
Accessory List
SPT-10T (Front Speaker Kit)
1” Tweeter (2 pcs)
SPT-30M (Front Speaker Kit)
3” Midrange (2 pcs)
Chevrolet/GMC
FULL SIZE TRUCK 4/14
SPT-80W (Front Speaker Kit)
8” Woofer (2 pcs) Foam Gasket (2 pcs)
SPT-70 (Rear Speaker Kit)
6-1/2” Coaxial Speakers (2 pcs) 4 x 30mm Screws (8 pcs)
ALP-31GM-POD (Front Dash Pod Kit)
Tweeter Pod Assembly
(2 pcs)
Tweeter Pod Template
(1 pc)
8-16 x 3/8” Screws
(10 pcs)
Washers (10 pcs)
Chevrolet/GMC
FULL SIZE TRUCK 5/14
ALP-31GM-MBKT (Front Dashboard Speaker Bracket Kit)
Midrange Speaker Adapters (2 pcs) #4 x ½” Screws (8 pcs)
ALP-31GM-SB-SP (Speaker Wire Harness Adapters and Rear Door Speaker Bracket Kit)
Rear Speaker Adapters (2 pcs) Harness Adapters (6 pcs) Cable Ties (8 pcs)
ALP-31GM-WBKT (Front Door Speaker Bracket Kit)
Woofer Speaker Adapters (2 pcs) #10 x 1” Screws (8 pcs)
RL
ALP-31GM-NW (3-Way Speaker Crossover GM)
Woofer Crossover (2 pcs) Tweeter and Midrange
Crossover (2 pcs)
Installation Manual & Warranty
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