Chevrolet vehicles are among the most popular platforms for aftermarket push button start upgrades in North America. Whether you own a Silverado, Tahoe, Suburban, Colorado, Malibu, Impala, Equinox, Traverse, Express, or another mechanical-key Chevrolet, the EFHIPS Push Button Start System can modernize your vehicle by adding push button ignition, keyless entry, remote start, and enhanced anti-theft protection.
Because Chevrolet vehicles use several different ignition and security system designs depending on model year, engine, and trim level, understanding the factory ignition system before installation is essential.
This guide explains the installation principles, common Chevrolet wiring characteristics, troubleshooting procedures, and frequently asked questions to help you complete a successful installation.
⚠️ Important: Always identify vehicle wiring by function using a digital multimeter. Do not rely solely on wire colors, as they may vary by model year, trim level, or market.
Chevrolet Models Commonly Installed
The EFHIPS Push Button Start System is commonly installed on:
Vehicle wiring may vary by model year. Always identify circuits by function rather than by wire color.
Before Installation
Before beginning installation:
✅ Vehicle starts normally using the factory key.
✅ Battery voltage is above 12V.
✅ Factory electrical system operates normally.
✅ Use a digital multimeter.
⚠️ Never identify ignition wires using color alone.
Understanding Chevrolet Ignition Circuits
Most mechanical-key Chevrolet vehicles include:
Constant Battery
ACC
IGN1
IGN2
Starter
Some GM vehicles include additional ignition circuits controlled by the Body Control Module (BCM). Always identify each ignition output before making permanent connections.
Brake Input (Most Important Connection)
The brake input wire allows the EFHIPS module to enter ENGINE START mode.
If the brake input signal is missing: The START button will only switch between ACC → IGN1 → IGN2. The starter motor will never engage.
Most Chevrolet vehicles provide a positive (+12V) brake signal when the brake pedal is pressed. Always verify the signal using a digital multimeter.
ACC Output (Blue Wire)
The ACC output powers:
Radio
Multimedia
Navigation
Accessory circuits
If connected incorrectly: The engine may still start normally. However, accessory functions may not operate correctly.
IGN1 Output (White Wire)
IGN1 supplies power to:
Dashboard
ECM / PCM
Engine management
IGN1 must remain powered during engine cranking.
Incorrect wiring may cause:
Dashboard remains dark
Ignition does not activate
Engine fails to start
IGN2 Output (Brown Wire)
IGN2 typically powers:
HVAC
Climate Control
Additional electrical accessories
Some Chevrolet vehicles remove IGN2 power during engine cranking. Others require IGN2 to remain powered. Always verify before connecting.
Starter Output (Yellow Wire)
The starter output activates the starter relay. If connected incorrectly: The starter motor will not crank. Some Chevrolet trucks may contain additional ignition or starter-related circuits. Always verify using a multimeter.
Chevrolet Passlock / Passkey Security System
Many Chevrolet vehicles use one of several factory anti-theft systems, including Passlock, Passkey, or PassKey III.
Typical symptoms include:
Dashboard powers normally.
Starter motor cranks.
Engine immediately stalls or fails to continue running.
⚠️ If these symptoms occur, inspect the factory security system before modifying ignition wiring. Depending on the vehicle, a compatible bypass solution may be required.
BCM (Body Control Module)
Many late-model Chevrolet vehicles route security and convenience functions through the Body Control Module (BCM).
Incorrect wiring around BCM-controlled circuits may affect:
Door locks
Security functions
Remote entry
Vehicle communication
💡 Always identify circuits carefully before making permanent connections. BCM-controlled circuits may behave differently than traditional ignition circuits.
Bench Testing Before Installation
Before connecting the system to the vehicle:
Connect:
Constant Battery Power
Ground
START Button
Press the START button. The internal relays inside the EFHIPS module should click. This confirms:
CPU operation
Relay operation
START button communication
Blue Status LED
The small blue LED is not a power indicator. It indicates only the security status.
System Disarmed → LED OFF
System Armed → Slow Flash
Alarm Triggered → Rapid Flash
LED OFF during installation is completely normal.
Remote Start Requirements
Remote Start requires:
✅ Parking Brake Input
✅ Fuel Pump Detection
✅ Vehicle Locked
✅ Security Mode Armed
⚠️ If any requirement is missing, Remote Start will not operate.
Fuel Pump Detection
The fuel pump detection wire allows the module to determine whether the engine has started successfully. If connected incorrectly: The system may attempt three automatic starts before stopping.
Common Chevrolet Installation Problems
Button Only Cycles ACC → IGN
Brake input not detected.
Dashboard Does Not Turn On
IGN1 wiring.
Radio Does Not Work
ACC wiring.
Starter Does Not Crank
Starter output, brake input, or ignition wiring.
Engine Cranks But Will Not Start
Passlock, Passkey, factory immobilizer, incorrect bypass, or security system not recognizing the key.
Do all Chevrolet vehicles require a bypass module?
No. Requirements vary depending on the factory anti-theft system. Some vehicles may require a compatible bypass solution, while others may not.
Why does my Chevrolet crank but not start?
If the starter motor operates normally but the engine will not continue running, inspect the factory Passlock / Passkey system before modifying ignition wiring.
Why doesn't my dashboard turn on?
Check the White IGN1 output.
Can I bench test the module before installation?
Yes. Bench testing is recommended before connecting the module to the vehicle.
Why doesn't the blue LED light up?
The blue LED is a security indicator only. It is not designed to indicate module power.
Disconnect the battery before cutting ignition wires.
Verify every ignition circuit using a digital multimeter.
Complete a bench test before installation.
Verify the brake input before diagnosing ignition outputs.
If the engine cranks but does not continue running, inspect the factory Passlock or Passkey system before modifying ignition wiring.
Never rely solely on wire colors.
Chevrolet Installation Assistant
Select your Chevrolet model and installation issue. The EFHIPS Assistant will suggest the most likely troubleshooting direction.
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EFHIPS Installation Center
Official installation guide for EFHIPS Universal Push Button Start System on Chevrolet vehicles. Professional installation recommended. Always verify wires with a digital multimeter.