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.
1988 GMC Forward Control 6.2 J, StandardFACTORY OEM SERVICE PROCEDURE
Torque Specifications
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| Fuel Inlet Nut | 30 (41) | |
| Fuel Outlet Nut | 21 (28) | |
| Idle Air Control Valve (Threaded) | 13 (18) | |
| Throttle Body-to-Manifold Bolts | ||
| 2.8L | 18 (24) | |
| All Other Engines | 12 (16) | |
| INCH Lbs. (N.m) | ||
| Fuel Meter Body Screws | ||
| Model 220 | 30 (3) | |
| Model 700 | 53 (6) | |
| Fuel Meter Cover Screws (Model 220 Only) | 28 (3) | |
| Fuel Pressure Regulator Screws (Model 700 Only) | 22 (2.5) | |
| Idle Air Control Valve Screws (Flange Mounted) | 28 (3) | |
Factory Service Tools
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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.
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