Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1999ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISBODY AND FRAMELOCKSKEYLESS ENTRYDESCRIPTION AND OPERATIONREMOTE KEYLESS ENTRY SYSTEM CIRCUIT DESCRIPTIONUNLOCK
1999 Chevrolet Astro Van 2WD V6-4.3L VIN W
Unlock
1999 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Unlock
The UNLOCK function separates into 2 operations. The separation depends on how you press the UNLOCK button on the transmitter. If you press the UNLOCK button once, the left front door unlocks. If you press the UNLOCK button twice within 1-5 seconds, all of the doors will UNLOCK, including the rear door.
The remote control door lock receiver unlock function sequence performs when the following conditions occur:
1. The remote control door lock receiver receives a valid VAC.
2. You press the UNLOCK button once on the transmitter.
3. You press twice within 1-5 seconds on the unlock button on the transmitter.
The remote control door lock receiver unlock function sequence performs when the following conditions occur:
1. The remote control door lock receiver receives a valid VAC.
2. You press the UNLOCK button once on the transmitter.
3. You press twice within 1-5 seconds on the unlock button on the transmitter.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.