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.
1996 GMC Yukon 2WD V8-5.7L VIN RFACTORY OEM SERVICE PROCEDURE
Manual Transmission Shift Light
Manual Transmission Shift Light:
Manual Transmission Shift Light (Cont):
Manual Transmission Shift Light Wiring Diagram:
Circuit Description
The control module controls the shift lamp using the following inputs:
^ Engine Coolant Temperature (ECT) sensor.
^ Throttle Position (TP) sensor.
^ Vehicle Speed sensor (VSS).
^ Engine RPM.
The control module uses the measured RPM and the vehicle speed to calculate what gear the vehicle is in. It is this calculation that determines when the shift lamp should be turned ON.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
1. This step checks the control module's ability to control the shift lamp.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no 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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.