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 MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 234 (ENGINE CONTROLS - REMOVAL & INSTALLATION)IGNITION SYSTEMSIGNITION COIL(S)REMOVAL (BANK 1)
1999 GMC Forward Control 5.7 R, Automatic
Removal (Bank 1)
1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal (Bank 1)
WARNING: This page is about a different car, the 2003 Cadillac Seville and 2003 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
- Bank 1 is the cylinder head that is closest to the rear of engine compartment. Turn ignition off. Remove mounting the 2 mounting nuts from the injector sight shield (top engine cover). Lift the injector sight shield off the mounting studs by lifting at the front of the cover. Disconnect the Ignition Control Module (ICM) electrical connector.
- Disconnect the AIR vent solenoid harness connector. Remove the bank 1 AIR shut-off valve. See SECONDARY AIR INJECTION SHUT-OFF VALVE under EMISSION SYSTEMS & SUB-SYSTEMS.
- Using the removal sequence, remove the ignition cassette retaining bolts. See Figure. Carefully remove the ignition cassette. Remove ignition coil(s) from ignition cassette as necessary.
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.