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 MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 169 (ENGINE CONTROLS REMOVAL & INSTALLATION)COMPUTERIZED ENGINE CONTROLSALTERNATIVE FUEL ENGINE CONTROL MODULEREMOVAL & INSTALLATION (2.2L - CAVALIER CNG)
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Removal & Installation (2.2L - Cavalier CNG)
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Removal & Installation (2.2L - Cavalier CNG)
WARNING: This page is about a different car, the 2002 Pontiac Sunfire and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
- Alternative Fuel Engine Control Module (AF ECM), also referred to as Alternative Fuel Engine Control Unit (AF ECU), is located behind left front headlight. See Fig 1. Disconnect negative battery cable. Remove front fender liner as required to access bolts from front fascia to fender. Remove front fascia to fender bolts. Remove push-in retainers from top and center of fascia. Remove push-in retainers from bottom of fascia. Remove front bumper fascia from vehicle.
- Remove AF ECM relay bracket bolt and relay bracket. Remove AF ECM. Disconnect electrical connectors from AF ECM. Remove nuts from ECU bracket studs and remove bracket.
- Install AF ECM mounting bracket to mounting studs using stud nuts. Tighten mounting stud nuts and AF ECM relay bracket bolts to specification. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure.
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.