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.
Enhanced/High Value Ignition System (OBD-II): Spark
1995 GMC Suburban K2500, 6.5 FSECTION Spark
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 1996 Chevrolet Chevy Van, 1995 GMC Vandura, 1995 GMC Sonoma, 1995 GMC Safari, and 1995 GMC Rally. However, it is still accessible from the selected car via links, so may be relevant.
- If equipped with factory tachometer, disconnect tachometer terminal before performing tests. To disconnect tachometer lead, it is necessary to disconnect the Gray ignition coil connector from ignition coil. Using a fused jumper wire, jumper connector terminal "B" of ignition coil and Terminal Test Adapter Kit (J 35616-A).
- Using Spark Tester (ST-125), crank engine and check for spark at coil wire and at each spark plug wire. If spark is not present or intermittent, go to next step. If spark is present, check spark plugs and fuel system.
- Check coil wire or spark plug wire resistance on suspect wire. Resistance should be about 1000 ohms per inch.
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.