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.
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HOMESERVICE MANUALSGMC1995SUBURBAN C1500, 6.5 FREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSKEYLESS ENTRY SYSTEM - REMOTESYSTEM TESTSTEST E: TRANSMITTER FUNCTIONS DO NOT OPERATE
1995 GMC Suburban C1500, 6.5 F
Test E: Transmitter Functions Do Not Operate
1995 GMC Suburban C1500, 6.5 FSECTION Test E: Transmitter Functions Do Not Operate
- Replace transmitter batteries, if condition of batteries are unknown. If transmitter now operates functionally, return vehicle to customer. If remote does not function, go to the next step.
- Jumper remote keyless entry BLK/WHT (1455) program wire to ground BLK (150) wire at keyless entry programming connector. If all power doors lock and unlock, go to the next step. If all doors do not lock and unlock, go to step 4 .
- Leave jumper connected. Obtain known good transmitter. Operate transmitter by pressing a single button once. Disconnect jumper from program connector. If transmitter operates all functions, replace inoperative transmitter and reprogram keyless entry module to replacement transmitter. See PROGRAMMING . If transmitter does not operate all functions, replace keyless entry module and reprogram replacement keyless entry module to transmitter. See CONTROL MODULE under REMOVAL & INSTALLATION and PROGRAMMING .
- Disconnect program connector jumper. Check BLK/WHT (1455) wire for short to ground. If wire is shorted to ground, repair the BLK/WHT (1455) wire and reprogram keyless entry module. See PROGRAMMING . If the wire is not shorted to ground, go to the next step.
- Measure voltage at keyless entry module connector C1 terminal "A" ORN wire (540). If battery voltage is present, repair ORN (540) wire and reprogram keyless entry module. See PROGRAMMING . If battery voltage is not present, replace keyless entry module and reprogram replacement keyless entry module to transmitter. See CONTROL MODULE under REMOVAL & INSTALLATION and PROGRAMMING .
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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.